Nothing Up My Sleeve
Motorhead渀 Lyrics

We have lyrics for 'Nothing Up My Sleeve' by these artists:

Motörhead You're playing tricks babe, and that's a fact Your magic cir…
Motorhead - Orgasmatron You're playing tricks babe, and that's a fact Your magic cir…
Motorhead/Motцrhead You're playing tricks babe, and that's a fact Your magic cir…
Motörhead You're playing tricks, babe and that's a fact Your magic cir…
Wilco I won't ever cry for you And you won't ever shed…

We have lyrics for these tracks by Motorhead渀:

Ace of Spades If you like to gamble, I tell you I´m you´re…
Angel City Come on I wanna grow my hair, live in Bel Air Lose…

Back On The Chain Don't be bitchin' honey 'Cause you're holding all the money…
Broken You don't know the trouble you're in Linvin' in paradise, li…
Civil War White noise is coming The wolf at your door Do you hear…
Claw Watching you watching me I was hoping you'd be here tonight…
Damage Case Hey babe, don't act so scared All I want is some…
Dead Men Tell No Tales This is it! Breaking up or breaking through Breaking someth…
Hellraiser I'm living on an endless road Around the world for rock…
I Got Mine Here's the story, there's only me, No other place for you…
I Know What You Need You better turn me loose, I got a trick up…
Jailbait Hey baby youÂ´re a sweet young thing, Still tied to mommyÂ´…
Life's a Bitch I don't know who you are, I don't know your name, But…
Love Me Like A Reptile Knew I had to bite you, baby, when I first…
March or Die The beast behind our eyes is loose, The day has come,…
Mean Machine Midnight runaway, know you're running scared Bright lights,…
Metropolis Metropolis, the worlds collide Ain't nobody could be on you…
On Parole They locked me up, put me away, Said "you're gonna get…
One More Fucking Time All life is a mystery, All things come to he who…
Shake The World Save me from this cold embrace Hide me from the man…
Shine Hard time getting to ya babe, Double take, figure real roug…
The Wolf We never see the evil deed, Nobody cares as long as…
White Line Fever We can move around now You know it's so good But I…
Whorehouse Blues Only way to feel the noise is when it's good…

You Better Run I got no reason, to lie to you What's in the…

The lyrics are frequently found in the comments by searching or by filtering for lyric videos

TRACKS

No Related Genres

More Genres

No Artists Found

More Artists Load All

No Albums Found

More Albums Load All

No Tracks Found

Genre not found

Artist not found

Album not found

Search results not found

Song not found

Comments from YouTube:

IceMetalPunk

7y↑45

However, there's still the issue of "did they design a backdoor in the algorithm specifically to take advantage of this number that otherwise would seem innocuous?"

Mike Hibbett

That is much harder.

JustGame

3y↑4

Yea, but the entire algorithm is public knowledge, it’s not like they can sneak in some extra bit that no one knows about because it has to be implemented in encryption libraries. The devs of the libraries probably could, but again these things will be checked by again and again by different people and agencies, it would take a large conspiracy across a range of people to get away with something like that. Not impossible, but improbable

MattyFez

7y↑258

You should do a video on the fast inverse square root function

Twisted Code

4y↑1

@IceMetalPunk FYI you are correct about random.org. They have three radio antennae set up in remote locations from one another and use some sort of obscure function to combine the three inputs. As I recall, they have 3 in part because it decreases the chance of one having some sort of bias, whether accidental or from deliberate RF interference.

UnAdministrator

7y↑2

Math or Game Developers - Fast Inverse Square Root
by Jorge Rodriguez

Check it out.

Frank Harwald

7y↑2

& the fast reciprocal as well

IceMetalPunk

7y↑1

+Nathan Dehnel Lawl. I love evolutionary programming (and machine learning in general), but... well, you already know :P

Nathan Dehnel

7y↑4

that's easy, just write a genetic algorithm to solve it /s

8 More Replies...

Dion

7y↑178

Dr Mike always entertaining

Kenneth

6y↑3

He is my favorite on this channel!

Jean-Pierre Coffe

7y↑10

He is absolutely awesome

Christian

7y↑24

It would be interesting to see a video on how backdoors work!

Jan Sten Adámek

7y↑1

Backdoor for hashes: because hashes are iterative (you add a block, jumble it, add another block, jumble it again and so on), a backdoor would be a “magic” block that when added to existing hash (note: oversimplification, it's not easy to add another block to a generated hash but it's still much easier than brute-forcing it) would after jumbling get an output hash that will make it easy to get the original block - e.g. your password (it can be the original block directly but that would be too obvious that someone will probably notice just by random chance). To get this “magic” block, you have to either bend the initial state or the algorithm (or both). Bending the initial state is easy which is the reason for nothing-up-my-sleeve numbers (sequences or digits of pi are highly unlikely to fit). Compared to that, bending the algorighm is very hard, especially if you want to keep the algorithm simple so that it won't look suspicious to have backdoors.

MelBrooksKA

7y↑4

Simple, you sneak out the back so no one knows you were there

JustGame

3y↑13

“How far can you go with pi”
“Well I can do better than that, because that’s wrong”😂😂

Nerdnumberone

7y↑18

Are there any famous examples of a contrived number that WAS used to put a backdoor in encryption?

MrHatoi

4y↑11

NIST's recommended constants for dual elliptic curve RNG are highly suspected to have a backdoor in them but I'm not sure if that's been proven.

alialgeneidy

7y↑7

I am a big fan of the channel & I like the idea of it so much as it widens the vision of an IT student (let alone other people) by providing a wide variety of topics which are being talked about from early computation which was demonstrated by Charles Babage's Integrated Calculator to Deep Learning algorithms, also covering topics in between such as Hashing Algorithms & Computer Security.
Love to watch more vids & topics explanation on the channel generally & by Dr. Mike Pound particularly.

AlucardNoir

7y↑440

Think the worse of you? In a world where Matt Parker keeps on giving us Parker squares? nah, you'll be fine.

Tomewyrm Draconus

7y↑1

I was about to comment on the pi mistake until the credits hit.
3.141592653589793 is as far as I can go from memory. But I've had that confidently memorized for over a decade.

Y F-N

7y↑1

Not me, I've known pi to 260 digits for at least a year and was fairly confident that I got it right. (Because whenever I say that people want to check me against the internet)

Matthew Maylin

7y↑4

He made me doubt what I had learnt pi as until the end

AlucardNoir

7y↑4

As long as he's not trying to redefine pi as 3 we're all good. I mean can you imagine the lawsuit that would ensue between him and the Bloody stupid Johnson estate? Or does the Ankh-morpork postal service own that patent?

Someone In The Chat

7y↑9

Mike was attempting to Parker Square the circle…

5 More Replies...

Levi Starrett

Another reason to pick specific numbers is that some numbers can lead to better performance of the algorithm without compromising the strength

M H

7y↑36

he's my fav computerphile guy

Nad G

7y↑1

I love the way he explaines things

B Bowling

3y↑5

It is truly sad that the NSA went from making standards stronger (DES/Differential Cryptanalysis) to making them weaker (NIST P-256).

MD Tanveer Hasan

Sad

Squelched Otter

7y↑31

I wonder why he didn't go into the Dual EC PRNG, where the constants were not Nothing-up-my-sleeve numbers and indeed were botched to make the algorithm weaker.

MyName

6y↑2

He made a video about it today, it's on this channel!

Mike Trieu

7y↑3

Of all the mindless trolls whinging about the Pi number error, you were the only one to acknowledge the N.U.M.S. controversy surrounding the NIST P-256 standard. Kudos to you, sir! It's also a painful reminder that Yubico chose to implement P-256/384 in hardware instead of a Safe Curve like Curve25519, even though it also has several well-known, open-source hardware implementations that run on commodity micro-controllers. I get the desire to bow to the corporate/government pressure of FIPS-140 compliance, but doing so means choosing to side with tyranny and I expected better from Stina Ehrensvard.

Ewan Marshall

7y↑2

Yep, which is why I attempt to avoid NIST p256 too. Using Curve25519 where possible as it is clear exactly how it is generated by someone not half as untrustworthy as the NSA.

Squelched Otter

7y↑7

it's a bit of a shame Micheal didn't go into the reason for the DES magic number too. It was because the NSA actually knew about differential cryptanalysis before it was known to the public so they tried to keep the origin of the constant as secret as possible to keep the technique secret.

mrlithium

7y↑1

I was hoping for not only this, (which i knew of) but other examples as well.

2 More Replies...

Robin Nixon

7y↑33

Couldn't a smart enough programmer realise a few different properties of seemingly innocent numbers, and choose the right combination of them that could give an edge later in cracking an encoded message?

Wuff Twenty-sixteen

@BP "Their own operational policy is to assume security is compromised at all times" Isn't that just SOP everywhere, which is why we have security in layers?

Pro Era

7y↑3

It's not telling at all to assume security is compromised at all times. EVERYBODY should assume security is compromised at all times regardless of the context.

hanelyp1

7y↑3

Yes an algorithm might be designed to have a hidden weakness with specific innocent numbers. But knowing where the numbers came from should make it a lot easier to find such a weakness.

Mike Trieu

7y↑3

But that's the point, isn't it? If a malicious actor wanted to hide a vulnerability in plain sight, it wouldn't do to risk any sufficiently knowledgeable third-party stumbling across that same vulnerability and calling them out on it publicly, thus irreparably damaging that actor's reputation. They need to engineer the vuln to be difficult to discover within a reasonably long operational timeframe. A.K.A. the Nobody But Us (NOBUS) principle.

Phillip Bradbury

7y↑9

It's the same principle that allows, say, public-key crypto to work. You take some random numbers, run them through some formulas, and you get answer out. But given the answer, it's real hard to figure out what numbers you started with. But if you know those starting numbers, that lets you undo some of the hard work of the crypto. For public-key cryptography, knowing the private key lets you easily decrypt messages encrypted using the public key. For a hash function, if there's a potential weakness in the algorithm you can exploit with a specially-crafted constant in the right place, then knowing how it was specially-crafted might let you create hash collisions more easily, or somesuch.

Now, sure, you can say "could someone sufficiently clever just pick random constants and then reverse-engineer a backdoor from it" but then you can also say "could someone sufficiently clever just take a public key and reverse-engineer the private key from it". In theory, mathematically speaking, yes, but practically speaking, not really. There isn't sufficient cleverness in the world, unless the crypto is real broken, in which case it's not going to survive the scrutiny of the world for long. The whole point of these things is that they're supposed to be infeasibly difficult to reverse-engineer.

2 More Replies...

Joe Strother

"suspicious numbers" , that's funny but true enough with untrusting human nature being what it is. There's always a gimmick, right lol No doubt aided by the temporary nature of 'encryption looking back on the 70's, 80's, & 90's. Always interesting to watch complexity try to keep pace with processing power. Thanks for the video's

BattleRapRuinedMyLife

7y↑22

I did spot you got pi wrong but your correction at the end helped me remember the next four digits (8979) so props for that

Justin c

@Inferno Captures ok

Inferno Captures

5y↑2

Not long ago I still had 3832 as my lockscreen code, haha

paul zapodeanu

For example is I used sha256(random_string), or the first however many bits I need from it? It'd be pretty damn hard to chose the random string such that it hash comes up to be something useful.

Kaweewat Hantrakool

7y↑7

Back in my 4-5th grade my brother buffed me with 50 digits of pi so I started remembering them. Now 20 years later I still can remember that.

Deep Joshi

DJB hash function uses 5381 as initial value which 1st primth primth primth primth primth primth primth prime number. But it was chosen due to good avalanching was achieved with that vaule. That kind of constant has to do something with prime number (as like many other things in cryptography) & we may understand that all better when we get a good understanding of primes.

Victor Vernalha

7y↑198

"Differencial cryptanalisys" come on, you can't just say that and not make a followup video about it!

sundhaug92

3y↑1

@Twisted Code Yeah it's "cryptOanalysis" (capital O for emphasis), because you're analysing crypto not crypts

Twisted Code

@Samuel Prevost actually I, speaking as an American, believe differential is correct. Not sure whether it should be cryptanalysis or cryptoanalysis, however
(Though cryptanalisys definitely looks like a typo mixing up the y and the i)

Samuel Prevost

5y↑3

@AlchemistOfNirnroot (sssshhhh, it might be the american spelling !)

AlchemistOfNirnroot

5y↑11

Differential cryptoanalysis?

1 More Replies...

Electric Spider

Pi is so weird. It has a point on our number system. Like it's there and doesnt move but because our number system has flaws (ie: it's impossible to accurately depict a 3rd as a decimal even though it exists on the number line) we'll never know the final digit of pi because it just cannot be fully written. If it could then that means that you will be able to fully fill a circle with triangles with no parts of a triangle going out of the circle. There will always be a part of the curve that lies out of bounds of a straight line.

Samboy Chips

Can you do an episode on how keys are exchanged in end-to-end encryption?

tommy karrick

4y↑4

“These numbers were chosen by the NSA-“
Okay so, you’ve already screwed yourself

Adrian Schmidt

I wasn't thinking worse of you. I was pretty impressed at 10 digits

notaseagull

It would be nice to see how one of these back doors would work. Like, has anyone shown that if you pick special numbers for SHA that it allows back doors?

schogaia

This guy rocks!

methodic onion

2y↑1

4:29 How could you do this to us? You went from 265 straight to 8 without the 35!

Edit: that's what I get for commenting before the video ends.

Flankymanga

7y↑3

I have to say that when NSA makes an encryption algorithm - ok thats perfectly fine, they need it themselves for defending against Russian Bear.... but when they release the same algorithm they made to public consumption its starts to sound fishy and when people find out that there are inside constant literals used in hashing... im not convinced that these are not used as backdoors...

Flankymanga

7y↑1

I would not be surprised.... they have the capacity to throw time and money on this kind of research....

Suave

7y↑1

I believe there was a leak some time ago on the nsa. It said something like there being 2 random large primes in some algorithm that were specifically designed to create a backdoor.

Attila Tóth

6y↑13

“Adjusted by NSA”? Nah mate, cannot be a coincidence, 100% sure its for making it weaker😂😂

zwz • zdenek

6y↑2

I wouldn't trust NSA if they told me water was wet. We really need to find a more trustworthy authority for our cryptography needs.

chiefjoboo

7y↑56

please make a video about how "estimated time remaining" for file transfers is almost always wrong.

Simon Multiverse

...and what is the estimated time to make that video and will the estimate be wrong ?? :) :) :)

Jack FierceTree

5y↑2

@Jacob Stewart your info doesn't stream through a server intact. A router breaks network info into packets that are sent through the system on a timeshare with other random packets... I think, or something close to that, it is all quite mindboggling to me.

Jacob Stewart

5y↑3

@Seraphina Joyce Why does the transfer rate have random fluctuations?

Seraphina Joyce

6y↑2

Ultimately it mostly comes down to how well (or badly) you smooth the inherently random data that is the random fluctuations in the transfer rate.

Amir Abudubai

7y↑20

Only if you use windows.

Bersl

7y↑2

I would have brought up Dual_EC_DBRG and the alleged backdoor in that PRNG.

Dustin Rodriguez

7y↑3

Perhaps they're considering a video on that later? Or perhaps they consider such a thing 'controversial'? I suppose there are some terrible human beings out there that would defend the actions of the scumbags at the NSA out of a combination of ignorance and unquestioning adoration of authority.

Poo2uhaha

6y↑2

nobody else noticed that he got the digits of pi wrong at 4:28 ? he missed out a 35

Phantomagic

So showing you the casual object doesn't mean one can't do magic with it.... but you were still held at a point where you might believe it's simple but not too simple to do the trick?

tehlaser

At the time that DES was designed, differential cryptanalysis was not public knowledge. The fact that the designers chose magic numbers resistant to it suggests that they already had knowledge of differential cryptanalysis--or something similar--up their sleeve, as it were.

Amir Abudubai

The NSA was probably using it on other people. Remember at the time cold war was still going on; it would make sense that the NSA would want to protect US business secrets(by extension the US's technological dominance) in case the Soviets know about differential cryptanalysis, but not let them know it exist if they haven't found it themself.

THE Mithrandir09

5y↑1

Do an episode about "OrpheanBeholderScryDoubt" :)

Kyle Amoroso

I've always heard them called magic numbers, never "nothing-up-my-sleeve" numbers 😕

E M

3y↑1

Magic numbers are more commonly used in file headers to make it clear what the file type is

yondaime500

7y↑4

I've always heard the term "magic numbers" to describe numbers people put in their code without explaining what they are (instead of declaring them are constants), so that eventually the program breaks down and no one (including the author) has any idea how to fix it because no one knows what those numbers are there for.

antoine savage

6y↑48

4:31 where's the 35?
Are you trying to backdoor us? :O

Doug Coulter

Of course, using simple counts could just as easily be creating a backdoor as any other without rigorous proof to the contrary. That argument is utterly specious. Just having seen that number before doesn't mean anything except to human bias, has nothing to do with math, reverse-ability and so on.

Nick Oldham

Commenting here to get more attention, couldn't you have a better version of Asimov's Laws by making "increase the human population" the goal? The main problem I've found so far is if it thinks too short term and, say, makes humanity force grow outside their food production, leading to a cascading falure when the system collapses. This could be solved with a "sustainable population" requirement, but there could be other problems.

Trevtao

Love me some Dr Pound!

steven lee

What is the constant number in the original code?

dust hill resident

7y↑1

Dr. Mike is the best

Wilco Verhoef

3y↑1

"just counting cannot create a backdoor"
How is this so certain? Is it impossible to create a backdoored algo specifically tuned to a set of magic counting numbers?

Wilco Verhoef

@HiIm Delta I was talking about introducing a new algorithm that seems to have straightforward magic numbers.

HiIm Delta

3y↑1

Is it theoretically possible? Yes. Is is probable that they've done that? No. How do we know? Because nobody else has found it.

That's why these numbers work for this. Everyone knows where these numbers came from, and every crpyto programmer is gonna be well-versed in them because Sha is the standard. So i imagine pretty much every crypto programmer has, at some point, tried to see if they could use one or more of those numbers to form a back door, cause they know how each is special and if there is some way to exploit it, then they will have just hacked the nsa, immortalizing them. I imagine it's probably one of those problems, like recognizing handwriting is for the nerual network crowd, where it's something they all try, and some probably come back to with more experience and try some more. Heck, I wouldn't be surprised if trying to find that backdoor is an assignment they give freshman in cyber security majors.

Tl;Dr, these numbers will have been analyzed and tested and squeezed constantly and consistently for however long they've existed, from every angle, simple and complex. If there was a possible backdoor, it would have been found. And maybe one was, not sure, but if so, all they'd need to do is replace it with avagadros number or whatever, ain't no big real

bloody_albatross

7y↑2

Why not use all zeros?

Jin

7y↑7

Nothing quite like commenting on the immutability of pi right after writing the wrong digits. No worries tho, it was cute.

mrlithium

7y↑2

LOL i spotted the pi error and spent the next few minutes thinking about what went wrong, then you told us at the end :P

Adam

6y↑1

I didn't understand where he was coming from about using numbers that are proven to be random nonsense until he used the magician picking the number '24' and then doing a trick with it.

Jia Ming

7y↑1

can we make a random backdoor number, and find unique aspects of it then show it's worthy of being a constant?

Fejfo

7y↑7

If the unique aspect is to complex people will trust it less.
if the unique aspect isn't complex it's unlikely to exist.

Furrane

Good video =)

Sam Auciello

7y↑1

But like.. why does the SHA algorithm require initial state in the first place. I'm not an expert but I feel like I could come up with a secure hashing algorithm without any hard coded seemingly arbitrary numbers.

Sam Auciello

I guess I don't know enough about differential cryptoanalysis to dispute this. It's just like.. before I watched this video I was not concerned that the NSA had a back-door for the SHA algorithm. After watching the video I'm not convinced. So.. the video failed to make the point it was trying to make..

Matti Sironen

7y↑3

Well you have to start somewhere, so your "numberless" algorithm would then presumable just use zeros instead of these random-ish but hard coded ones. This would not only be more obscure from coding point of view but probably a lot less secure.

The only really differing case would be to use (pseudo) random numbers but then the algorithm would no longer be deterministic and fit for purpose.

Punkkap

7y↑1

Sam Auciello he said they make the algorithm resistant to differential cryptoanalysis

Ŕųśhî Śçöřpîøñ

5y↑2

I was shocked when u mentioned 26589 , in pi how and when pi was changed

Then realized u were carried away by topic , and messed up with the pi

John Blake

You are wrong about the first digits of PI, you missed a 35. They are: 3.14159265 35 8979

John Blake

@Computerphile You're right :)) I posted this too early

Computerphile

Watch to the end.... >Sean

starttimartti

Eek! The dark colours on this video are crushed. You can't see any details on Mike's shirt for example. I hope that it's a mistake and not something intentionally put in during the editing.

Toboter XP

7y↑47

How do you call the number of times pi has been written in the carribean divided by the time in wich this occured?pi-rate of the carribean!

Kyle Amoroso

7y↑3

KlaxonCow Your version is more clever.

KlaxonCow

7y↑11

How often do they use pi in the West Indies?

Why, that would be the "pi rate of the Carribean"!

What The Function

7y↑3

Did you explain what these numbers do?

Kaitlyn L

but stage magicians do pick the number! very often! they just use sleight of hand to hide that they have, and put on a show of the person supposedly picking their own.

Treble Clef

7y↑1

I came to the comments to see everyone telling him off. Then he corrected himself.

Sara Perestrelo

What is a mathematical back door?

Iykury

7y↑4

Some magic numbers are words, like 0xDEADBEEF.

Mal-2 KSC

6y↑1

DEADBEEF is a serviceable media player, but I still prefer Audacious when booted into my Linux partition (which is admittedly almost never).

1 More Replies...

Julian Mahler

I can't believe nobody left a comment on how he got Pi wrong

J4J0

I would have, but he corrected himself in the outro.

Funny Geeks

7y↑31

4:26 RIP 3.5E-9

Sponge .

6y↑2

I was looking for this comment :D Glad I'm not the only nerd that noticed that.

Someone In The Chat

7y↑1

Lεst wε forgεt.

See Jian Shin

the thumbnail is the best

Kenichi Mori

Proof of the number.

Gregory Fenn

7y↑1

I thought there would be some mathematical definition or metric that says how a given number is "not up my sleeve" :/ Little disappointed tbh.

parkamark

I think my favourite "Nothing Up My Sleeve" number is 0xF5B3669E

Jacob Stewart

5y↑6

"mathematical numbers"
So, just numbers then?

mezza205

7y↑3

you want random numbers buy a gaxio.

Op Op

at 04:29 - those where not the correct first digits of pi, they are: 314159265358

NoriMori

Op Op Watch the end of the video.

Peter Velzen

7y↑1

Sorry, but nobody "knows" the squareroot of two!

Nerd Alert

… which is irrelevant because in this context, only the first N digits are required (e.g. 2^30 * sqrt(2) rounded to the nearest integer). The first ten trillion decimal digits of sqrt(2) have been calculated, BTW.

Y F-N

7y↑1

Peter Velzen it was a joke

Peter Velzen

So what do you know about it? You just gave the definition, but you did noet tell us how big it is in de base of the unit square. That would be informative. Saying it is itself does not tell you anything.

Garry Iglesias

7y↑1

+Y F-N ... True, I wrote this comment too close from my waking time :).

Y F-N

7y↑6

Garry Iglesias no, in base "square root of two" it's exactly one zero.

1 More Replies...

Oliver Dunk

This may be a silly question, but why 0x67452801? To me, 0x12345678 would have been the 'less fishy' number to use.

Jither

TG MrNacknime is right. The constants (in principle) are 0x01234567, 0x89abcdef, 0xfedcba98 and 0x76543210 (and the fifth, 0x0f1e2d3c). The NSA didn't dream up these nothing-up-my-sleeve-numbers for SHA-1. They just reused the constants Rivest used in MD4 and MD5 (except that they needed a fifth constant, so they took the concept just a bit further). MD4 and MD5 both assume little endian in their specifications. In this case, little endian vs big endian doesn't really make a difference, since inside the hash function, the numbers have little meaning as numbers anyway. But it means that when we deal in big endian, they'll look reversed.

The square root based constants are also taken from MD4.

Chill Bro

7y↑1

0110 0111 0100 0101 0010 1000 0000 0001
VS
0000 0001 0010 0011 0100 0101 0110 0111

As you can see, the jumbled version has a more "random" set of 1's an 0's that you need for your program to work in the way you want it to.

So 0x67452801 is a good middle ground between "random enough to make the program work" and "You know where the number comes from."

Nacknime

It might also just be little-endian (the order of the bytes is reversed), thus 0x67452301 is 0x01234567

walmartsuxhard

This guy looks like gabe from the office.

Dan

In iOS10.3.2 they stop using SHA-1 :P

WPF in C#, did that for my A-Level Computing haha :p

Nothing Nothing

SHA-1 has been cracked, it takes allot of processing power but is feasible to do thats why it was removed

Endie

MY TERRACOTTA ARMY

Czeckie

6y↑5

I've spotted the mistake in pi and I think worse of you

Y F-N

Actually its 314159265358979, what he
said was 314159265 8979
at 4:23

Y F-N

7y↑1

Oh wait he corrected it at the end never mind

not disclosed

I don't trust AES S-box values.

Anndrei02

I knew Mike reminded me of someone,Toby Maguire ,ah!:D

Snatch n Grab

7y↑1

Don't worry... any and all approximations of π are wrong.

Nerd Alert

That obviously depends on the requirements … or the definition of wrong. For example, IEEE 754 requires that the result of dividing two floating-point numbers a/b, assuming it is within range, must be exact to representable precision. As a human readable example, this could look like: 10.0 / 3.00 -> 0.333, all with 3 digits of precision. While this number is obviously not the true result of 10/3, it is in fact the (only) correct approximation of 10/3 to 3 decimal digits. IOW, it is the least wrong approximation to 3 digits.

Sebastian Mora Taboada

3:43 frigg it

Magic Mike

wolvenar

Fun

darksteam999

PI = 3.14159265358979.....

João Vitor Matos

You should subtitle all your videos. For the non-English-speaking world, it's kind of hard to understand British English

LivingLegacy7

7y↑9

I still don't really get it.

Yazan Alaboudi

7y↑2

All that he is saying is that you need some initial number to start the sha1 function. What the initial number is, doesnt matter. That's the main takeaway. In most sha1 implementations, the initial numbers are made public and dont hold any specific meaning. If a library just used '123456789' as the inital numbers, everyone understands its just someone using 1 to 10 as a starting point to kickoff the algorithm. It's highly unlikely that 1 to 10 will be break the sha1 function or provide a backdoor mechanism. But, if you saw some mysterious numbers as the starting point like '830458746698', you'd just be a little worried what implications these numbers have and wonder if the library uses this particular number for any backdoor reasons..... or at least that's the rational that most people have.

Calle Silver-Granhall

I think they are generally used to seed the pseudo-random generating algorithms. You mix them into the data to create hashes. Correct me if I'm mistaken, I have never implemented cryptography or hashing in general.

LivingLegacy7

Okay but what are the numbers used for? Why do they exist at all if they don't mean anything?

Massimo

7y↑6

Let's say in a movie scene you see the main character dial a phone number which you can clearly see it's 555-123456 you won't think much of that number and continue watching the movie.
What if the number was something else like 406-22786 (I made it up) maybe you still won't think much of it but if you are a bit savvy you might notice that's not the usual holliwood 555 number and might decide to investigate further or just straight up pause the movie and call it. And you find out it's an easter egg that relates to the movie somehow (let's say the answering machine of a famous pizzeria in the movie universe).

That's the same deal with the magic numbers used in cryptographic algorithms, they are chosen to be like 555 numbers: obviously not with any kind of ulterior motive to be as they are.

Lee Mac

7y↑3

The chosen numbers are to demonstrate that the constants are essentially arbitrary, and are used with no hidden agenda. Any constants could be used to salt the hash, provided that the constants are agreed upon by everyone using the algorithm. Constants which follow an obvious pattern (such as counting up & down) are easily seen as being arbitrary.

1 More Replies...

MrReality473

He wrote pi wrong 😒😒

MrReality473

I know but he should've gotten it right the FIRST time

NoriMori

Reality Channel Watch the end of the video.

pillukana

up my sleeves

kstringer24

0:30 fervour?

kstringer24

That's my point. His speech impediment makes him difficult to understand because his poor pronunciation produces other genuine words, but said out of context.

NoriMori

kstringer24 Not a speech impediment, just an accent.

FriedEgg

7y↑1

Further. He pronounces 'th' as 'v', probably a mostly british speech impediment.

Joseph Peters

He loves to rip off people

Roger Keulen

SAY WHAT !?
I can't roll my own encryption using Computerphile vids..... (unsubscribed)

Conall Kingshott

messed up pi!

》《

he says so at the end.

Peter Rafeiner

Pi is wrong... :-)

Машин Иван

I’ve spotted it. How could you?! Unsubscribed.

Load More Comments...

More Comments

just now