RSA-129 - Numberphile
Vložit
- čas přidán 1. 02. 2017
- The large number "RSA-129" posed a challenge experts said would take 40 quadrillion years to solve - but took 17.
Featuring Ron Rivest, co-inventor of RSA... More links below...
Our original RSA video (how it all works): • Encryption and HUGE nu...
More from Ron from this interview (quantum computing): • Quantum Computing and ...
More Ron Rivest on Numberphile: bit.ly/RonRivest
Ron Rivest's own website: people.csail.mit.edu/rivest/
Public Key Cryptography on our sister channel, Computerphile: • Public Key Cryptograph...
RSA-129: 114381625757888867669235779976146612010218296721242362562561842935706935245733897830597123563958705058989075147599290026879543541
Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumberphile
We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science.
NUMBERPHILE
Website: www.numberphile.com/
Numberphile on Facebook: / numberphile
Numberphile tweets: / numberphile
Subscribe: bit.ly/Numberphile_Sub
Videos by Brady Haran
Patreon: / numberphile
Brady's videos subreddit: / bradyharan
Brady's latest videos across all channels: www.bradyharanblog.com/
Sign up for (occasional) emails: eepurl.com/YdjL9 - Věda a technologie
This man is "R" in "RSA"? Wow, thank you, numberphile!
Антоша Пушкин Finally! No one in the contents seems to be appreciating what an honor this is!
When they said who he was I was like "holy sh*t!"
same
+Chris Knowles I totally do, this is amazing. I work with RSA daily.
Привет соотечественникам, если ты из России, конечно)
$100 for 40 quadrillion years' work. Flipping heck, that's nowhere near a living wage.
I like how the final payment didn't account for inflation. Let alone did the reward have enough years for inflation to have had a significant effect anyways.
🤣
It's worth mentioning that the RSA algorithm (under a different name) was known to the US/UK governments close to 10 years before RSA discovered it. Cliff Cocks was technically the "first" person to discover public key using prime numbers (though RSA discovered it independently as well).
Super. Do you have a link or the name of the algorithm to read about it ?
When you learn about these guys in books and powerpoints in uni, which you pay a shitload for, and then get a lecture by the guy himself for free on the Internet.
Praise kek
*PRAISE KEK* 🐸🐸🐸
Key Encryption Key?
oh my goodness this is the first time I've seen a live video from "the R" from "RSA"... every student or former student of computer science has run into RSA sooner or later. This is just great. Thank you!
Hey random people reading comments, have a great day!
I'm not random, I'm specific and I specifically hope your day is at least satisfactory.
Junior Matsuda thanks, you too!
Junior Matsuda You too!
You too!
Happy birthday, Tim!
Who else imediately spotted the P = NP on the blackboard at 1:20?
Be sure to check out the extra footage at Numberphile2
czcams.com/video/tX7e7CgWrvM/video.html
Numberphile notice me senpai
Numberphile Good video :)
P vs NP I declare genocide
It's P=NP, and this is one of the major unsolved problems in mathematics. Wikipedia has a short introduction to this concept.
"$100 for that much computer time was really quite a coup" That gave me a good laugh haha
1:19 The famous RSA trio had already proven P = NP on a classroom chalkboard decades before it became a millennium prize problem.
1 = 1 * 1
0 = 0 * 0
Look mom I solved it!
P=NP
P/P=N
P/P=1
N=1
Thanks Brady for once again getting a great interview with yet another legend!
Typo at 5:24 - unless ScienTITific American is a real journal?
oops, can get a 129-digit number right, but not the word Scientific...
Alex Evans That was just their Swimsuit Edition.
Numberphile You just have to release a risqué reproductive biology edition…
Numberphile Welcome to the Nerd Internet.
The official misspelling of the Numberphile CZcams channel
I grew up playing with this guy's RC4 algorithm. Neat to see him interviewed. Thank you Numberphile!
This Channel is gold for CS and Math Students. Lots of love from India
Thanks for returning to Numberphile Ron! Please come back! We want to know more about the other mathematics you do!
114381625757888867669235779976146612010218296721242362562561842935706935245733897830597123563958705058989075147599290026879543541st
something is wrong with youtube. How can you be 114381625757888867669235779976146612010218296721242362562561842935706935245733897830597123563958705058989075147599290026879543541st when the video only has 3.325 views
Wow! The video has apparently gotten 5148.675 more views in 3 minutes
Well copied! thanks
I totally didn't post that earlier or so
+TheBodyOnPC How can it have 3·325 views? Surely a video has either been watched, or has not been watched... so where does the 0·325 of a view come from?
+Inky Scrolls Are you actually serious?
Back in the day in university learning about cryptography I would never have dreamed about one day seeing the 'R' in RSA talking in a youtube video about how they came up with those famous numbers.
It feels like witnessing an important part of computing history.
I'm so excited about this, thank you very much for doing this, I love your video 💙😭
I have seen this man in previous Numberphile videos but had no idea he was Ron Rivest from RSA! Amazing!
I believe there's already a number called "one twenty nine"! I can't remember which one though...
Brady: How much prep do you do before interviewing people like Professor Ron Rivest?
I enjoy how you ask "simple" questions to get things rolling, then dive in a bit deeper on the follow-up. Well done!
Some years ago I wrote a novel based on the idea that in the 13th Century, Roger Bacon devised a method for quick factorization, and when this method was rediscovered in the present day, it threatened to break RSA. Couldn't sell it to a publisher though. Too much maths :(
Watching this exactly a year after it was posted! Clicked on it out of pure interest!
A. Lenstra is actually one of my professor
what's the feeling of attending his lecture?
@@andeslam7370 He's a brilliant person, and an excellent teacher; I only had one class with him but his lectures were really a lot of fun to attend.
Arjen Lenstra was my professor at EPFL, it was such an honour to attend his lectures!
11438(etc) : Number of tweets using the word "tremendous".
There also a sum who caracterise this number, rsa-129= a+2sqrt(ab+1)+b with ab+1 is a perfect square and 0
The legends! Learnt these guys from my cryptography course!
I'm watching this with spare time in my math class haha
one of the better numberphile videos in recent history
I'm happy because for once I realized that I already knew something.
Oh one of the RSA here !! Mr. Rivest ! :)
I always was fascinated by his team's work !
very interesting topic ... then would such algorithm in the few coming years be substituted ?!
technology actually advances in a way totally unexpected and unpredictable @_@
great lecture!
Hi Numberphile, french fan here! I wondered if you guys would be interested in having someone to translate some of your subtitles in french (particularely this one, but others too). You have a lot of interesting videos I'd love to share with my high school students, unfortunately their english level isn't always enough to understand everything (or anything for some ^^). Thanks for reading me, I hope to hear from you soon. Bye!
Wow, this is one of the people who I can thank for RSA keys for my frequent SSH work! I knew the very basics of the RSA keys, but this is a great background. Thank you for this video.
How long would it take to factor RSA129 with a modern top of the line single system? would AVX 2.0 make this far easier?
what a warm and smiley cryptographer
what a great insight into the early development of a method almost everybody uses when connecting to the internet today! Do more on cryptography :)
This guy is Ron Rivest. The R in RSA. Wow. This is such an honor.
I'm studying at infosec faculty and I'm pretty sure we actually were told about this number and people and story behind it.
Awesome.
Excellent video from the creator!
Intriguing way of attracting people's minds towards maths reality
i remember the part of the challenge that had integer partition generated numbers, hundreds of them i believe from 100 digits to 1000 digits. I was someone that even got published for factoring one of those, a really small number times a really large one.
Just read the description... You reckon it took 17 quadrillion years to solve?
doubt it, Earth is only 6000 years old.
Nik Conlon a joke?
Harry Ward facts, read your bible dude
That joke went over about as well as a brick of lead.
Phoe Nix I know in the bible it says that the earth is 6000 years old but I wasn't sure if it was a sarcastic comment on that, or if it's about the fact that the description makes it seem as though it was 17 quadrillion years as opposed to the 17 that it's implied to be.
Phoe Nix I don't have one
Oh my goodness, an inventor of RSA, RC*, MD* and randomised partial checking? This man is a god!
What a humble genius!
Awesome Video!!
Please more videos on cryptography! !!!!!! encryption, etc! Thanks. He puts the R in RSA.
I love how happy he is talking about this =P
If you're reading this, have a Great day! 😄😄😄
Thanks, have a great life!
CyanGaming | ᴹᶦᶰᵉᶜʳᵃᶠᵗ ⁻ ᴳᵃᵐᵉᴾᶫᵃʸ you forgot "- from small youtuber"
OML the cancer has spread from Mumbo Jumbo
oml not here too
I have one of this guy's textbooks on my desk right now :)
Fermat's method of factorization generalizes to all figurate numbers.
Fantastic content thanks for sharing . What does he mean by 'rolling the dice' ? Obviously it's a metaphor but I'd like to understand what they did exactly .
read the girl with the dragon tattoo!! They're 4 awesome books involving this
I remember stumbling on an article by Helleman in the August 1979 issue of Scientific American called "The Mathematics of Public-Key Cryptography" as a young trainee programmer in the early 1980's. I used that article to implement a (fairly amateurish) public key encryption system in IBM Basic Assembler Language that ran (really slowly!) on an IBM 3031 mainframe. I still have the source code, but unfortunately it is on 9-track 6250 bpi round magnetic tape - and I have no way to read it to find out just how amateurish my effort was! Of course, at the time I had no idea how important public key cryptography would become, and so it is kind of annoying to not have proof that I once dabbled in leading edge technology
Second question: Can we use Dr. Tokieda's ruler-method to generate factor pairs?
Find the square root of your large product of primes. Find the primes to either side, multiply. If too big, move the smaller one down the list of primes. If too small, move the larger up the list of primes...
I don't know what to think about the P = NP in the background at 1:18
Justifer14 P =N...ot P
Nice Mighty Black Stump cameo
This guy is a legend.
this guy is a legend
u should touch on digital rooting and the vedic square. 9!!
nice video
Brady, you really need a mic on you, if you are to be heard when asking questions from behind the camera.
Apart from that, another really interesting video.
You independently reinvented the algorithm. It was developed at GCHQ by Clifford Cocks. Deleting if mentioned later.
It has been said that HP-50g is a computer as it can handle as large number as the memory can hold. But on the other hand it is a calculator as it is allowed to be used in school tests.
I learned a lot just now
Ron Rivest is a genius.
Nice channel
Since the primes become significantly less densely represented the larger integers get, doesn't that directly act to reduce the difficulty of finding p and q as the final number gets larger and larger? Are p and q supposed to be very close to each other in length? If so, doesn't that make it much easier to find them as you can just start with the square root and test around there? If they can differ substantially in length, are there advised minimums for each?
I'm 6 years late, but you shouldn't start at the square root at search close to there. See Computerphile's more recent "breaking RSA" video for the explanation - basically that an attacker could do the same thing
Can we create a candidate list of all likely primes (with a certain number of digits), and then just multiply the last few (3-ish) digits until a combination works to find the last few digits of the target number?
Then once the candidate list is complete, double the number of digits that we care about, and rinse & repeat until there is only one possible combination? It seems like this would be much faster than trying to multiply out the whole prime values...
That list would be larger than the observable universe
I wrote a little prime factoring program back in the 90’s. You put in the number of your choice and it spits out a list of the prime factors. So in essence that is what is needed to find the factors of your number. The program couldn't digest that many digits though.
Fun! I'm nowhere to being in your league though. Of course.
I wonder how many viewers have never actually heard hardware making the modem sound that starts around 4:20 into the video.
Ahh, the joys of dial-up connections. Those were the good-old days ... NOT!
in 100 years viewers will assume it was an Enigma cipher machine warming up 🤣
Nice
I KNOW I KNEW THAT PHOTO WITH 3 GUYS AND "P = NP"! IT IS RSA!! How could I not have noticed? An absurdly large integer as the product of two huge primes together with a smaller number...
Are Shamir or Adleman still working in the industry?
In case anyone's curious, here's the message that RSA-129 encrypted: "The magic words are squeamish ossifrage."
Also, Brady et al. -- have you ever touched on the seeming paradox of one to the power of infinity being undefined? Logically it should be 1, but...
But what?
But 1^infinity is undefined, much as 1/infinity is.
Infinity is not a number, so no numerical operation on infinity is defined. Infinity implies the absence of a limit to a process. Saying that "the sum of (1/2)^n for n from 1 to infinity = 1" simply says that as n increases without limit the sum becomes arbitrarily close to 1.
The indeterminate form 1^infinity is actually to represent functions such as (1+1/t)^t as lim t -> infinity. Technically speaking in that function, where the limit approaches depends on if 1+1/t gets to 1 faster than it being multiplied by itself infinitely many times.
Was the cheque ever cashed? or kept for sentimental reasons?
for all primes numbers p above 1 and below RSA-129(r), if r/p is in primes: return (r,p)
it should take around number of primes*n time to work, which is very fast.
AP gonna try that.. don't think it's gonna be that fast.. plus you only need to check till sqrt(RSA129)
AP But now you need to find all the 64 digit prime numbers, which is even more difficult.
RSA-129 = 3490529510847650949147849619903898133417764638493387843990820577
× 32769132993266709549961988190834461413177642967992942539798288533
It was factored in 1994 using ~1600 computers
but easier than random chance by far :)
Numberphile is poaching from computerphile now.
both are directed by the same guy, so yeah
Without seeing the answer Id solve by using a computer to iteratively converge down to the solution, i.e. multiply large primes if the product is too small try larger ones, if the product is too large then try smaller, basically it would require some computer programming skills to write the correct program
Why is it easy to determine that p and q are prime but difficult to find the factors of pq? Seems like you would need to find the factors of p and q individually to know whether they are prime... Is it just that pq is much bigger?
Wait, so i can just create a 300 digit P and Q number by adding 1 or other tests to find the closest prime number and then multiply the 2 and get a massive number that not even supercomputers can figure out the original numbers that generated that number?
I am Brazil, factoring the prime number is taking the number multiplied by all the odds before it, from top to bottom, there will only be 1 that is prime and another is the rest that is a prime number.
Who else thinks Numberphile should make a video showing how they make their videos and how you can do the same and submit them to a specific website in which they can of videos on? Or at least to have a channel of your own like this one?
Can someone solve this:How many rectangles are there in a 5x7 rectangular network?
This seems fairly easy to solve. Just take the list of all known prime numbers and start dividing them in.
f(x)=(x^2) +-2x +-[3-cos(x.pi)]/2
Any value for x (except 0 which gives 1)atleast 1of the 4 equation will generate a prime.
Why this happens?
What if you multiplied 100 prime numbers together. Then you randomly picked 2 factors of that number. The cracking of the code would become harder because not only would you have to factorise the number into it's primes, you'd also have to find the unique combination of the 100 primes. There are approximately 2^99 ways to split the number into two factors.
Jarah Fluxman the point of encyption is usually to be able to decrypt it yourself? if youre just choosing 2 primes from a set of 100 large primes thats less secure than choosing two from the set of natural numbers
I like how numberphile can make an interesting video out of algebraic math.
king joe It's really the only big channel about maths... in contrast to channels dedicated to phisics, biology and science in general, which are a lot more.
The Commentator Yes I know, but the thing is that this topic has a very advanced background, methods that couldn't be found until a few decades ago.
I tried writing a python script for this, but it only works for smaller primes. I can't get it to work with large primes. Any thoughts?
def prime_finder(num):
x=2
while x
Damn I took Comp Security back in College... And its all flooding back now
I was thinking that I could write code in an hour or so to solve this (but the time taken to execute said code would be a bit larger.)
About 15,000,000,000,000,000,000,000,000,000,000,000,000 years, assuming you check a million ps and qs per second. :)
This is exhilarating
see you created a critical table also known as the payment table where you restrict a one Pacific or large number then you'll end up going down the actual chart which indicates a permit wants it spread out these particular numbers in this chart
have you tried a reverse technique of this chart by turning the chart upside down and working from a small number tours a big number multiplying or dividing or taking away
Why did they offer a $100 prize for the factorization? Seems kind of pointless.
Khan Singh
An incentive that wouldn't break the bank.
+Khan Singh $100 prizes for math problems is kind of a tradition and nod to Erdös
Well, for a cashier's check the money is still gone, it's withdrawn when the check is issued
Yeah, the real value is in being awarded the prize (which may enhance one's professional reputation). Donald Knuth has been giving out checks for finding errors in his "Art of Computer Programming" books, starting at something like $1 for the first error reported, $2 for the second, etc. I may be the only Knuth-error-award recipient who went ahead and deposited my check.
So what? You can cash it and keep it too.
i got a loop running just picking random numbers and multiplying them to see if i can find it with blind luck.
I have an alghorithm for factoring number as product of two primes with success of 50%.Pretty fast...
But isn't the symbol for a random prime number capital pi?
it's Chuck McGill from better call saul!
When he said “decimal digits,” I thought he meant decimal in the common meaning of the word for most people. I had to replay it twice to understand what he was saying.
What does BSA 1 mean? It's the letters in the background of the caption ?!
Can we try and do the most people solving the rubix cube at once ?
🙏
"...the cheapest purchase of lots and lots of computer time." Well played.