CryptoHack is a fun platform for learning modern cryptography through a series of puzzles and challenges. Free to play for all

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Joined March 2020
We've just launched our most requested feature: CryptoHack courses! We've curated sets of challenges into guided tours, introducing our players to the fundamentals of modern cryptography We hope this inspires many new people towards loving cryptography cryptohack.org/courses/
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Try finding a random super singular curve without learning its endomorphism ring! It's easy to check that a given curve is super singular (without learning the endo ring), but finding one without constructing an isogeny to 0 or 1728 (and thus learning the endos)? Really hard!
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Try finding a random super singular curve without learning its endomorphism ring! It's easy to check that a given curve is super singular (without learning the endo ring), but finding one without constructing an isogeny to 0 or 1728 (and thus learning the endos)? Really hard!
Sometimes it's hard to pick out an element of a set even though there is an abundance of elements. Here's one of my favourites...
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CryptoHack retweeted
Sometimes it's hard to pick out an element of a set even though there is an abundance of elements. Here's one of my favourites...
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CryptoHack retweeted
My inaugural lecture at @ETH_en is up. It’s only 20 minutes and there are jokes. Give it a try! video.ethz.ch/speakers/lectu…
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So who’s gonna be the one to tell Grant about steam ciphers?
Time AI is back, and it's as bonkers as in 2019 bonus points for the "Reverse XOR" 🤡 crownsterling.io/wp-content/…
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CryptoHack retweeted
Time AI is back, and it's as bonkers as in 2019 bonus points for the "Reverse XOR" 🤡 crownsterling.io/wp-content/…
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🎉Congrats to Gabrielle De Micheli, Pierrick Gaudry and Cécile Pierrot for their Best Paper Award at Asiacrypt 2021! 🎉 This rewards their work "Lattice Enumeration for Tower NFS: a 521-bit Discrete Logarithm Computation" eprint.iacr.org/2021/707
New record discrete log computation using Tower NFS in 521-bit GF(p^6) by Gabrielle De Micheli (@GabrielleDeMic2), Pierrick Gaudry and Cécile Pierrot! This target finite field is of the form that is used in recent Z-K proofs in some blockchains. Details: gmicheli.github.io/#Record%2…
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CryptoHack retweeted
Ça fait un moment qu'on est dans le cryptogame et pourtant peu de nous maîtrisent vraiment les bases de la cryptographie, pour y remédier j'ai trouvé cette plateforme : cryptohack.org/ @CryptoHack__
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@luca_defeo does it again with the excellent crypto videos (w/ @jeffburdges): youtube.com/amUP8EZ8Z0w
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Wait Steve Gibson has a password generator that's doing server side password generation using AES with a fixed IV and key and a monotonic counter and so he can just replay it whenever to recreate all of the previously generated passwords?
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Thanks to @sambowne and @InfoSecIrvin for having me during their Cryptography and Security seminar. A recording of the seminar has been uploaded onto YouTube youtube.com/watch?v=GAOkDvdA…
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Excited to chat with some students about cryptography, security and if people ask, a bit of maths too. Keen to answer people's questions, so if you want to pick my brain, then pop into the seminar. For those who can't make it, the stream will be uploaded onto YouTube - Jack
Tomorrow at 9 am PDT: @CryptoHack__ speaks to our security classes--everyone is welcome! Details at samsclass.info/
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And if you have a burning question but know you can't make it, feel free to tweet me and I'll try and find a way to add an answer into the talk if it fits :)
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Talking in about 10 mins
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CryptoHack retweeted
Excited to chat with some students about cryptography, security and if people ask, a bit of maths too. Keen to answer people's questions, so if you want to pick my brain, then pop into the seminar. For those who can't make it, the stream will be uploaded onto YouTube - Jack
Tomorrow at 9 am PDT: @CryptoHack__ speaks to our security classes--everyone is welcome! Details at samsclass.info/
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My @IACReurocrypt 2021 presentation about Dummy Shuffling against White-box Algebraic Attacks is out (joint work with @alexcryptan): youtube.com/watch?v=OMm8NNpP… iacr.org/submit/files/slides…
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CryptoHack retweeted
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I'm looking for PhD students starting Autumn 2022 at @WarwickDCS. If you're interested in proof systems (of both classical and quantum varieties), please get in touch! More info here: warwick.ac.uk/fac/cross_fac/…
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