Cothan

PhD in Post-Quantum Cryptgraphy @ CERG GMU | Crypto Player | Code Reverser | Founder of Efiens.

[Wenxuan Shi @whexyshi]

Team 42-b3yond-6ug successfully broke through in #AIxCC, advancing to the finals and winning a $2,000,000 prize provided by DARPA. During #DefCon, we had frank and in-depth exchanges with various teams. Keep up the good work, looking forward to seeing you again in 2025!

[Cothan @c0th4n]

@mjos_crypto Wow, congratulation!

[Taylor Hornby 🛡❤️ @DefuseSec]

Cool list of post-mortems: https://t.co/Ze3j0pWWpI

[Quan Thoi Minh Nguyen @cryptosubtlety]

The greatest lectures about zero-knowledge proof systems by the fantastic Alessandro Chiesa, UC Berkeley are hidden and unlisted on YouTube. Now, you know the secret links 😀
https://t.co/9W58aDtxCh

[Cothan @c0th4n]

@haxor31337 @Hacker0x01 @LamScun @thaivd98 @dunglt140150 @trieulieuf9 @yabeow @Jok3rDb @datph4m My guess: Vietnam meets Romania at top 4. Good luck to Vietnam.

[Cothan @c0th4n]

@cryptodavidw I spent years to find best combination of shell, setting configuration and all that. Fish, oh-my-zsh, zim, weird shell shit that I can't remember name.
Then I stop at https://t.co/aI6OPUFvDA, it's good, and good enough to not worry about shit shell and configuration anymore.

[IACR @IACR_News]

#ePrint Lattice-Based Blind Signatures: Short, Efficient, and Round-Optimal: W Beullens, V Lyubashevsky, NK Nguyen, G Seiler https://t.co/jbd6DxaTQB

[Cothan @c0th4n]

Hey Twitter, Can someone point me to any latest resource to learn more about bignum arithmetic?
I read Bignum 2006 book but wonder how things have changed over the year.

[Cothan @c0th4n]

Sign Message: Hawk > CRYSTALS-Dilithium > Falcon
Verify Signature: Falcon > Hawk > CRYSTALS-Dilithium

https://t.co/1Lp4ROVSGY

[Cothan @c0th4n]

As you might know. Korean has their own PQ Competition (KPQC).
Here is a brief timeline:

Nov 2022: First round.
Dec 2023: Second round.
Mar 2024: First KPQC Conference
Sep 2024: Second KPQC Conference, announce result.

Link:https://t.co/clqUD8kpSm

[Cothan @c0th4n]

Lastly, to guarantee the results are reproducible, all of our implementation will be published.

My Falcon code will be published.
The Dilithium and Falcon in Hardware will be published as well.

[Cothan @c0th4n]

So my papers have been accepted to NIST 4th Conference.
- "Fast Falcon Signature Generation and Verification Using ARMv8 NEON Instructions"
- "High-Performance Hardware Implementation of Lattice-Based Digital Signatures"

https://t.co/fSyzZCXhTX

[Cothan @c0th4n]

The first paper is my high speed implementation of Falcon. With optimization on memory usage, fast FFT and NTT implementation.

The second paper is our state-of-the-art high-speed design for Dilithum signature.

Both paper will have comparison, ranking.

[Cothan @c0th4n]

@MKannwischer Thank you. I did go back and benchmark again. This version is still slower compare to x2 keccak + sha3 on M1.

[Cothan @c0th4n]

Inspired from the work of Becker et al., I benchmark performance Keccak f1600 on Apple M1.

Here are the result for 3,4,5-way:
https://t.co/jbqbVfkcHt

[Cothan @c0th4n]

@MKannwischer @iwsec @yx7__ @bo_yin Congratulation! Do you have slide available?

[Cothan @c0th4n]

Hey Twitter, for submisison to TCHES, what is the score range?