writeups
NCS-Competition
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| writeups | NCS-Competition | |
|---|---|---|
| 8 | 1 | |
| 122 | 5 | |
| 5.7% | - | |
| 6.6 | 0.0 | |
| 17 days ago | almost 3 years ago | |
| Python | Python | |
| - | - |
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writeups
- Question about ECDSA
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Reduced Round AES CTR Attacks
See: https://github.com/p4-team/ctf/tree/master/2016-03-12-0ctf/peoples_square and also https://github.com/TFNS/writeups/tree/master/2020-06-05-DefenitCTF/spn (this one is not AES but some toy SPN, but the idea is exactly the same and maybe easier to understand)
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Supersingular Isogeny Key Exchange in Python
Not exactly purely in Python because with sage and also the goal was breaking SIDH, but: https://github.com/TFNS/writeups/tree/master/2020-04-17-PlaidCTF/sidhe
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What are some real-world security issues in cryptography?
I'm not even mentioning big stuff like https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ which interestingly enough is actually a vulnerability very similar to what exists in Java since the dawn of time -> https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/sun/security/provider/DSA.java#L358 (see: https://github.com/TFNS/writeups/tree/master/2020-10-03-TastelessCTF/petition )
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Technical Advisory – Arbitrary Signature Forgery in Stark Bank ECDSA Libraries
The same issue exists in Java JDK for quite a while (see: https://github.com/TFNS/writeups/tree/master/2020-10-03-TastelessCTF/petition ) ;) I suspect there are many more libraries with similar problem.
Seems like the same problem as exists in Java JDK in DSA -> https://github.com/TFNS/writeups/tree/master/2020-10-03-TastelessCTF/petition
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How did this person manage to extract all the RSA prime numbers in this writeup?
Check my writeup https://github.com/TFNS/writeups/tree/master/2021-10-23-ASIS-quals/madras if you need to understand where this come from.
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Using compromised algorithms.
See an example: https://github.com/TFNS/writeups/tree/master/2021-03-13-UTCTF/sleeves
NCS-Competition
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Help with Decompiling Binary file
The correct decompilation for the binary's main() function and the bm01.zip file that contains the binary executable itself can both be found here: https://github.com/HHousen/NCS-Competition/tree/master/Binary/BM01. (The correct decompilation is in the readme.)
What are some alternatives?
tweetable-polyglot-png - Pack up to 3MB of data into a tweetable PNG polyglot file.
XFFF - CTF servers using socket() and No-sql
squarectf - The "code" for squarectf.com
Ciphey - ⚡ Automatically decrypt encryptions without knowing the key or cipher, decode encodings, and crack hashes ⚡
svachal - Automate writeup for vulnerable machines.
CTF-Writeups - A collection of write-ups and scripts from various CTFs I've participated in
cryptofuzz - Fuzzing cryptographic libraries. Magic bug printer go brrrr.
HiddenWave - Hide Your Secret Message in any Wave Audio File.
hackingtool - ALL IN ONE Hacking Tool For Hackers
SIKE-Python - A python implementation of Supersingular Isogeny Key Exchange (SIKE) using the optimized reference algorithms
wycheproof - Project Wycheproof tests crypto libraries against known attacks.
ctf - Ctf solutions from p4 team