actual new years resolution: properly understand differential cryptanalysis
December 31, 2024 at 3:45 PM
actual new years resolution: properly understand differential cryptanalysis
New art from @steillustrates.bsky.social
Starfleet Intelligence Cryptanalysis Section, codename Room 47, London, c. 2157
Starfleet Intelligence Cryptanalysis Section, codename Room 47, London, c. 2157
June 1, 2026 at 2:05 PM
New art from @steillustrates.bsky.social
Starfleet Intelligence Cryptanalysis Section, codename Room 47, London, c. 2157
Starfleet Intelligence Cryptanalysis Section, codename Room 47, London, c. 2157
ENEMY COMMUNICATIONS INTERCEPTED STOP
CONSIST SOLELY OF QUOTE AWAWA UNQUOTE WITH DIFFERING NUMBER OF WAS STOP
HAVE REFERRED TO CRYPTANALYSIS STOP
CONSIST SOLELY OF QUOTE AWAWA UNQUOTE WITH DIFFERING NUMBER OF WAS STOP
HAVE REFERRED TO CRYPTANALYSIS STOP
January 7, 2026 at 8:03 PM
ENEMY COMMUNICATIONS INTERCEPTED STOP
CONSIST SOLELY OF QUOTE AWAWA UNQUOTE WITH DIFFERING NUMBER OF WAS STOP
HAVE REFERRED TO CRYPTANALYSIS STOP
CONSIST SOLELY OF QUOTE AWAWA UNQUOTE WITH DIFFERING NUMBER OF WAS STOP
HAVE REFERRED TO CRYPTANALYSIS STOP
I wrote up a short blog post giving my thoughts on the new Anthropic cryptanalysis results against HAWK and AES. blog.cryptographyengineering.com/2026/07/29/s...
Some notes about Anthropic’s new results
Yesterday Anthropic published two new cryptanalysis results, both outputs of Claude Mythos, their (still) unreleased advanced model. The first of these results attacks a signature scheme called HAW…
blog.cryptographyengineering.com
July 29, 2026 at 2:38 PM
I wrote up a short blog post giving my thoughts on the new Anthropic cryptanalysis results against HAWK and AES. blog.cryptographyengineering.com/2026/07/29/s...
"Rubber hose cryptanalysis" for the nitpickers in the audience.
May 27, 2025 at 5:17 PM
"Rubber hose cryptanalysis" for the nitpickers in the audience.
We now have $16,000 riding on CRQCs, and $8,000 riding on lattice cryptanalysis!
April 11, 2026 at 4:36 PM
We now have $16,000 riding on CRQCs, and $8,000 riding on lattice cryptanalysis!
I have to say, publishing results as zero knowledge proof does have one benefit: it tricks security researchers into learning about quantum circuits. This is some amazing work!
https://blog.trailofbits.com/2026/04/17/we-beat-googles-zero-knowledge-proof-of-quantum-cryptanalysis/
https://blog.trailofbits.com/2026/04/17/we-beat-googles-zero-knowledge-proof-of-quantum-cryptanalysis/
We beat Google’s zero-knowledge proof of quantum cryptanalysis
Comments
blog.trailofbits.com
April 17, 2026 at 3:23 PM
I have to say, publishing results as zero knowledge proof does have one benefit: it tricks security researchers into learning about quantum circuits. This is some amazing work!
https://blog.trailofbits.com/2026/04/17/we-beat-googles-zero-knowledge-proof-of-quantum-cryptanalysis/
https://blog.trailofbits.com/2026/04/17/we-beat-googles-zero-knowledge-proof-of-quantum-cryptanalysis/
The NSA's first rule of cryptanalysis, as publicly disclosed by Bob Morris: "First, look for cleartext. You'll usually find it."
October 17, 2025 at 1:05 AM
The NSA's first rule of cryptanalysis, as publicly disclosed by Bob Morris: "First, look for cleartext. You'll usually find it."
#ResistanceRoots
Elizebeth Friedman was born on this day in 1892 in Huntington, Ind. Widely recognized as America’s first female codebreaker, she laid the foundations of modern military intelligence, dismantled powerful Prohibition-era smuggling rings and tracked Nazi spies during WWII. /1
Elizebeth Friedman was born on this day in 1892 in Huntington, Ind. Widely recognized as America’s first female codebreaker, she laid the foundations of modern military intelligence, dismantled powerful Prohibition-era smuggling rings and tracked Nazi spies during WWII. /1
August 27, 2026 at 12:52 AM
#ResistanceRoots
Elizebeth Friedman was born on this day in 1892 in Huntington, Ind. Widely recognized as America’s first female codebreaker, she laid the foundations of modern military intelligence, dismantled powerful Prohibition-era smuggling rings and tracked Nazi spies during WWII. /1
Elizebeth Friedman was born on this day in 1892 in Huntington, Ind. Widely recognized as America’s first female codebreaker, she laid the foundations of modern military intelligence, dismantled powerful Prohibition-era smuggling rings and tracked Nazi spies during WWII. /1
Ah, of course, extending previous work in rubber-hose cryptanalysis!
September 9, 2026 at 2:33 AM
Ah, of course, extending previous work in rubber-hose cryptanalysis!
it's rubber hose *cryptanalysis* smh my head
December 1, 2025 at 11:04 PM
it's rubber hose *cryptanalysis* smh my head
Come for all the UUIDs everyuuid.com, stay for the unexpected cryptanalysis. eieio.games/blog/writing...
By the one and only @itseieio.bsky.social, of course.
By the one and only @itseieio.bsky.social, of course.
December 7, 2024 at 3:17 AM
Come for all the UUIDs everyuuid.com, stay for the unexpected cryptanalysis. eieio.games/blog/writing...
By the one and only @itseieio.bsky.social, of course.
By the one and only @itseieio.bsky.social, of course.
If you are interested in anything related to the automatization of cryptanalysis, please consider attending SKCAM 2025 (co-located with FSE 2025 in Roma). Its free, just register on: skcamworkshop.github.io/skcam2025/
The 1st Workshop on Symmetric-key Cryptanalysis Automation and Modelling (SKCAM 2025)
The website of the 1st Workshop on Symmetric-key Cryptanalysis Automation and Modelling (SKCAM 2025)
skcamworkshop.github.io
December 18, 2024 at 9:26 AM
If you are interested in anything related to the automatization of cryptanalysis, please consider attending SKCAM 2025 (co-located with FSE 2025 in Roma). Its free, just register on: skcamworkshop.github.io/skcam2025/
See also real life breaking encryption vs movie breaking encryption. Hint: google "rubber-hose cryptanalysis".
October 20, 2025 at 3:07 AM
See also real life breaking encryption vs movie breaking encryption. Hint: google "rubber-hose cryptanalysis".
This was (ironically) called "rubber hose cryptanalysis" (as in "Tell me your passphrase or I'll hit you with this rubber hose again").
9/
9/
May 28, 2026 at 11:51 AM
This was (ironically) called "rubber hose cryptanalysis" (as in "Tell me your passphrase or I'll hit you with this rubber hose again").
9/
9/
Recently declassified by the #NSA, an internal study from 1988 titled: "Fifty Years of Mathematical Cryptanalysis (1937-1987)" www.governmentattic.org/58docs/NSA50...
www.governmentattic.org
May 27, 2025 at 8:53 AM
Recently declassified by the #NSA, an internal study from 1988 titled: "Fifty Years of Mathematical Cryptanalysis (1937-1987)" www.governmentattic.org/58docs/NSA50...
We can really put the "anal" into "cryptanalysis"
November 17, 2023 at 7:00 PM
We can really put the "anal" into "cryptanalysis"
what up NSA peeps. Don’t want to leave USN Group 6 out either #FtMeede #cryptanalysis #NSA #codes #nosuchagency
December 8, 2024 at 3:00 AM
what up NSA peeps. Don’t want to leave USN Group 6 out either #FtMeede #cryptanalysis #NSA #codes #nosuchagency
Huts at Bletchley Park, the heart of UK signals intelligence and code-breaking during World War II
#alphabetChallenge
#weekCforCommunication
#alphabetChallenge
#weekCforCommunication
July 20, 2025 at 10:59 AM
Huts at Bletchley Park, the heart of UK signals intelligence and code-breaking during World War II
#alphabetChallenge
#weekCforCommunication
#alphabetChallenge
#weekCforCommunication
To say nothing of cryptanalysis.
October 7, 2025 at 2:12 AM
To say nothing of cryptanalysis.
once upon a time we called this "rubber hose cryptanalysis" on the theory that you'd beat them with a rubber hose because they allegedly don't leave marks
May 18, 2025 at 3:09 PM
once upon a time we called this "rubber hose cryptanalysis" on the theory that you'd beat them with a rubber hose because they allegedly don't leave marks
Super pleased to see that Zama has just announced the first recipients of the Zama Cryptanalysis Grants.
www.zama.ai/post/announc...
The projects supported cover security of FHE, MPC, TEEs and ZK.
The teams getting the grants represent some of the leading experts in their respective fields.
www.zama.ai/post/announc...
The projects supported cover security of FHE, MPC, TEEs and ZK.
The teams getting the grants represent some of the leading experts in their respective fields.
Announcing The First Recipients of The Zama Cryptanalysis Grants
The Zama Cryptanalysis Grant Program supports research that challenges the security of today’s privacy-enhancing tech.
www.zama.ai
June 3, 2025 at 11:53 AM
Super pleased to see that Zama has just announced the first recipients of the Zama Cryptanalysis Grants.
www.zama.ai/post/announc...
The projects supported cover security of FHE, MPC, TEEs and ZK.
The teams getting the grants represent some of the leading experts in their respective fields.
www.zama.ai/post/announc...
The projects supported cover security of FHE, MPC, TEEs and ZK.
The teams getting the grants represent some of the leading experts in their respective fields.
As was a fair chunk of the cryptanalysis system, yes!
And the team making the implosion device and its pit featured several Germans.
The “we” I intend here is the opponents of Fascism, which transcended nationality.
And the team making the implosion device and its pit featured several Germans.
The “we” I intend here is the opponents of Fascism, which transcended nationality.
June 7, 2025 at 11:17 PM
As was a fair chunk of the cryptanalysis system, yes!
And the team making the implosion device and its pit featured several Germans.
The “we” I intend here is the opponents of Fascism, which transcended nationality.
And the team making the implosion device and its pit featured several Germans.
The “we” I intend here is the opponents of Fascism, which transcended nationality.
Here's something counterintuitive to non-practitioners: curve P-521 is often less secure in practice than curve P-256.
The latter is more popular, and so better tested. The risk of implementation bugs dwarfs the risk of partial cryptanalysis of ECC, so picking P-521 optimizes for the wrong thing.
The latter is more popular, and so better tested. The risk of implementation bugs dwarfs the risk of partial cryptanalysis of ECC, so picking P-521 optimizes for the wrong thing.
May 1, 2025 at 5:40 PM
Here's something counterintuitive to non-practitioners: curve P-521 is often less secure in practice than curve P-256.
The latter is more popular, and so better tested. The risk of implementation bugs dwarfs the risk of partial cryptanalysis of ECC, so picking P-521 optimizes for the wrong thing.
The latter is more popular, and so better tested. The risk of implementation bugs dwarfs the risk of partial cryptanalysis of ECC, so picking P-521 optimizes for the wrong thing.
1965 Cryptanalysis Training Workbook Released by the NSA
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term "Stethoscope" to describe a diagnostic computer program used to unravel the internal structure of pre-computer…
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term "Stethoscope" to describe a diagnostic computer program used to unravel the internal structure of pre-computer…
1965 Cryptanalysis Training Workbook Released by the NSA
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term "Stethoscope" to describe a diagnostic computer program used to unravel the internal structure of pre-computer ciphertexts. The term appears in the newly declassified September 1965 document Cryptanalytic Diagnosis with the Aid of a Computer, which compiled 147 listings from this tool for Callimahos's…
www.schneier.com
September 2, 2025 at 11:09 AM
1965 Cryptanalysis Training Workbook Released by the NSA
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term "Stethoscope" to describe a diagnostic computer program used to unravel the internal structure of pre-computer…
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term "Stethoscope" to describe a diagnostic computer program used to unravel the internal structure of pre-computer…