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JP Aumasson

@aumasson.jp
1.3K followers 80 following 144 posts

aumasson.jp cofounder & CSO @ taurushq.com cryptographer (BLAKE2, BLAKE3, SipHash) author of Serious Cryptography nostarch.com/serious-cryptography-2… and other books Signal: jpa.01

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JP Aumasson @aumasson.jp · 25/09/2026
on Markku breaking bad crypto from China www.bfswa.blog/p/cryptograp...
bfswa.blog
Cryptographic mass murder
China’s cryptography standardization project
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Reposted by JP Aumasson
Carbonadoks @carbonadoks.com · 24/09/2026
Pleometrics PC-98 P(Doom) video is so good.
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JP Aumasson @aumasson.jp · 28/08/2026
the Daybreak Blue trusted access I have isnt supposed to show those warnings, it's probably just the model being extra safe
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JP Aumasson @aumasson.jp · 26/08/2026
I used GPT to break an ePrint cipher www.bfswa.blog/p/blood-meri...
bfswa.blog
Blood MERIDIAN
LLM cryptanalysis of a blockcipher that is isn't a blockcipher
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JP Aumasson @aumasson.jp · 03/08/2026
quick write-up about my evening read www.bfswa.blog/p/inside-the...
bfswa.blog
Inside The Road's graphic novel
On Manu Larcenet’s magnificent, yet imperfect adaptation
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JP Aumasson @aumasson.jp · 31/07/2026
www.bfswa.blog/p/llms-wont-...
bfswa.blog
LLMs won't break symmetric crypto
And Anthropic's cryptanalysis work is great
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JP Aumasson @aumasson.jp · 20/07/2026
www.bfswa.blog/p/crypto-eth...
bfswa.blog
Crypto ethymology
What's the origins of names like Ascon, Keccak, Kyber, and Rijndael?
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JP Aumasson @aumasson.jp · 19/07/2026
www.bfswa.blog/p/real-world...
bfswa.blog
Real-world decryption
When decryption is both easy and hard
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JP Aumasson @aumasson.jp · 16/07/2026
possibly my most inspired post bfswa.substack.com/p/no-country...
bfswa.substack.com
No Country for Old Men & The Road
The Eras Tour, Cormac McCarthy (5/6)
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JP Aumasson @aumasson.jp · 26/06/2026
new post bfswa.substack.com/p/the-border...
bfswa.substack.com
The Border Trilogy
The Eras Tour, Cormac McCarthy (4/6)
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JP Aumasson @aumasson.jp · 25/06/2026
did some USG infosec archeology bfswa.substack.com/p/on-high-va...
bfswa.substack.com
On high value assets (HVA) and high impact systems in U.S. federal infosec
and not the post-quantum cryptography migration context they relate to
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JP Aumasson @aumasson.jp · 09/06/2026
bfswa.substack.com/p/too-much-c...
bfswa.substack.com
Too Much Crypto explained
An LLM's attempt to explain my controversial cryptography paper
031
JP Aumasson @aumasson.jp · 21/05/2026
took me a while bfswa.substack.com/p/blood-meri...
bfswa.substack.com
Blood Meridian
The Eras Tour, Cormac McCarthy (3/5)
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JP Aumasson @aumasson.jp · 13/05/2026
bfswa.substack.com/p/pen-and-pa...
bfswa.substack.com
Pen & paper quantum computing
The math is super easy don't be scared by the Greek letters
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JP Aumasson @aumasson.jp · 09/05/2026
www.aumasson.jp/data/talks/p...
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JP Aumasson @aumasson.jp · 09/05/2026
new post bfswa.substack.com/p/the-eras-t...
bfswa.substack.com
The Eras Tour, Cormac McCarthy (2/5)
Era 1: The Southern Gothic years
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JP Aumasson @aumasson.jp · 31/03/2026
major update github.com/veorq/awesom...
github.com
GitHub - veorq/awesome-post-quantum: A curated list of resources about post-quantum cryptography.
A curated list of resources about post-quantum cryptography. - veorq/awesome-post-quantum
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JP Aumasson @aumasson.jp · 29/03/2026
#noncrypto bfswa.substack.com/p/the-eras-t...
bfswa.substack.com
The Eras Tour, Cormac McCarthy (1/5)
Era 0: Youth short stories
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JP Aumasson @aumasson.jp · 27/03/2026
Q-merch store.aumasson.jp
store.aumasson.jp
Serious Quantum
Spring Store
021
Reposted by JP Aumasson
Gynvael Coldwind @gynvael.bsky.social · 27/03/2026
A perfect 1-page Friday reading → here's a fun article by Jacob Strieb about (ab)using <canvas> element in HTML and PNGs to get DEFLATE compression into older browsers (without reimplementing the whole thing in JS).
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Reposted by JP Aumasson
Dare Obasanjo @carnage4life.bsky.social · 27/03/2026
Just saw the leaked images from a former podcaster turned government official’s account being hacked. If you elect clowns, you get a circus.
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JP Aumasson @aumasson.jp · 27/03/2026
Russian 5G: that "NEA-7" seems to be Kuznyechik, at least according to iz.ru/2061648/vale.... The algorithm is known, even defined in an RFC (www.rfc-editor.org/rfc/rfc7801). Part of the design (the S-boxes) is opaque, but I dont think it's actually backdoored/insecure.
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Reposted by JP Aumasson
Molly White @molly.wiki · 27/03/2026
As they angle for a presidential pardon in television interviews, Sam Bankman-Fried’s law professor parents file “pro se” motions for their adult son, leave voicemails with the judge, and sign documents claiming they're from him in prison.
citationneeded.news
Sam Bankman-Fried’s helicopter parents crash into federal court
SBF praises Trump from prison, his parents beg for a pardon on CNN, and his legal ethics professor mother files court documents claiming to be from him — prompting a judge to demand he swear under oat...
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JP Aumasson @aumasson.jp · 27/03/2026
is "Q-day" in French "le jour Q"?
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JP Aumasson @aumasson.jp · 27/03/2026
NEA-7 = Kuznyechik via news.risky.biz/risky-bullet... iz.ru/2061648/vale...
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JP Aumasson @aumasson.jp · 19/03/2026
this and more on my QUANTUM merch store (promo code QUBITS, valid for a week) store.aumasson.jp
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JP Aumasson @aumasson.jp · 19/03/2026
bfswa.substack.com/p/im-so-tired
bfswa.substack.com
I'm so tired
of correcting quantum computing misconceptions
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JP Aumasson @aumasson.jp · 08/02/2026
bfswa.substack.com/p/bletchley-...
bfswa.substack.com
Bletchley Park
A cryptographer's pilgrimage
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JP Aumasson @aumasson.jp · 01/02/2026
Last ̶c̶h̶a̶p̶t̶ tractate of my serialized novella, and the best one. I'll collect feedback, do more editing, and get it printed. The featured photo's mine. bfswa.substack.com/p/the-ninth-...
bfswa.substack.com
The Ninth Berth – Tractate 10: Lights
10/10
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JP Aumasson @aumasson.jp · 28/01/2026
merci, on va corriger!
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JP Aumasson @aumasson.jp · 27/01/2026
quick note on trustlessness and SPoFs bfswa.substack.com/p/trust-them...
bfswa.substack.com
Trust them, don't trust it
A note on trust and SPoFs
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Reposted by JP Aumasson
JP Aumasson @aumasson.jp · 27/12/2025
bfswa.substack.com/p/dealing-wi...
bfswa.substack.com
Dealing with airport secondary screening
When you have nothing to hide
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JP Aumasson @aumasson.jp · 17/01/2026
bfswa.substack.com/p/quantum-co...
bfswa.substack.com
Quantum computing for lawyers
and anyone who’s not sure what “quantum” means
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JP Aumasson @aumasson.jp · 27/12/2025
bfswa.substack.com/p/dealing-wi...
bfswa.substack.com
Dealing with airport secondary screening
When you have nothing to hide
142
JP Aumasson @aumasson.jp · 27/12/2025
2026 will bring more blockchain/quantum/AI scams, hacks, overvaluations, bankruptcies; VC psyops, trolls and bots, paid articles and endorsements. Meanwhile there wont be no... - "AGI" - useful/practical quantum computers - meaningful blockchain use beyond tokenization Like the past 10 years.
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Reposted by JP Aumasson
Matthew Green @matthewdgreen.bsky.social · 16/12/2025
Imagine it’s 2013 and you see this document from the UK sent back from the future. You’ll assume something went very wrong in that timeline.
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JP Aumasson @aumasson.jp · 14/12/2025
bfswa.substack.com/p/it-web3-se...
bfswa.substack.com
It web3 security going great?
Nah.
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JP Aumasson @aumasson.jp · 13/12/2025
remember email bfswa.substack.com/p/poor-johnn...
bfswa.substack.com
Poor Johnny still won't encrypt
The state of email encryption
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JP Aumasson @aumasson.jp · 07/12/2025
#notcrypto bfswa.substack.com/p/music-sunday
bfswa.substack.com
Music Sunday
Detour into classical guitar
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Reposted by JP Aumasson
DilDog 🅅 @dildog.l0pht.com · 04/12/2025
they stole my idea for browncloud somewhere there is a click farm in indonesia looking at pictures of your turds and training an AI to judge your poop and apparently it is not ass-to-ass encrypted
'End-To-End Encrypted' Smart Toilet Camera Is Not Actually End-To-End Encrypted
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JP Aumasson @aumasson.jp · 04/12/2025
bfswa.substack.com/p/upbit-hack...
bfswa.substack.com
Upbit hack's Occam's razor
and ECDSA's fragility
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Reposted by JP Aumasson
No Starch Press @nostarchpress.bsky.social · 01/12/2025
Build your offensive security lab with 18 DRM-free books worth $700+. Download once, read anywhere, keep forever. Pay what you want (starting around $36) and support the EFF while you’re at it: www.humblebundle.com/books/hacking-…
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JP Aumasson @aumasson.jp · 30/11/2025
bfswa.substack.com/p/opsec-guid...
bfswa.substack.com
OPSEC guide BTS
From Frankfurt to WIRED
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Reposted by JP Aumasson
Lily Hay Newman @lhn.bsky.social · 29/11/2025
I was really thrilled to get to work on The WIRED Guide to Digital Opsec for Teens with @aumasson.jp. I think we did a good job but also apologies in advance to the teens that we tried to make jokes and generally Be Chill. Also no paywall to make it easier to share! www.wired.com/story/digita...
wired.com
The WIRED Guide to Digital Opsec for Teens
Practicing good “operations security” is essential to staying safe online. Here's a complete guide for teenagers (and anyone else) who wants to button up their digital lives.
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JP Aumasson @aumasson.jp · 29/11/2025
did that with @lhn.bsky.social
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JP Aumasson @aumasson.jp · 27/11/2025
bfswa.substack.com/p/crypto-inv...
bfswa.substack.com
Crypto investment advice
Profit 100% guaranteed
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JP Aumasson @aumasson.jp · 25/11/2025
even the marketing-oriented IBM roadmap doesnt really support "break 256-bit ECC in 2030"
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JP Aumasson @aumasson.jp · 24/11/2025
in 5 years bfswa.substack.com/p/when-will-...
bfswa.substack.com
When will quantum break crypto? the answer will shock you
And other crypto-prophecies.
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Reposted by JP Aumasson
Ben Adida @benadida.com · 22/11/2025
The International Association for Cryptologic Research has used heliosvoting.org – my online voting system – for a number of years. This year, a trustee lost their secret key. The election has to be re-run. Below, a few thoughts that didn't fit in the NYT piece. www.nytimes.com/2025/11/21/w...
nytimes.com
Cryptographers Held an Election. They Can’t Decrypt the Results.
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JP Aumasson @aumasson.jp · 18/11/2025
bfswa.substack.com/p/bad-bad-cr...
bfswa.substack.com
Bad, bad crypto
Is not good crypto
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