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POST

Predictable pattern in the numbers used to build SHA-256

REDDIT / NewspaperNo4249 / Sep 19, 2025

Have a nice day! import mpmath as mp mp.mp.dps = 50 def fractional_sqrt(x: mp.mpf) -> mp.mpf: r = mp.sqrt(x) return r - mp.floor(r) def sha256_frac_to_u32_hex(frac: mp.mpf) -> str: val = int(mp.floor(frac * (1 << 32))) return f"0x{val:08x}" # First 8 …

POST

Building a Career in Auditing Cryptographic Software

REDDIT / fosres / Sep 18, 2025

In a previous post I asked for tips on auditing crypto software on my spare time (https://www.reddit.com/r/crypto/comments/1myz2il/tips\_on\_auditing\_cryptographic\_source\_code/) I am still doing CryptoPals in preparation for auditing GNUPG. I am now considering a career in auditing / attacking cryptographic software. Aside …

POST

What is the best Way to get in to Cryptography

REDDIT / Cycl0neGT / Sep 14, 2025

Hello I am a Bit of a Beginner when it come to this field of study I am a Student that is Studying IT and I want to get my Hand wet a bit with This Field What would be …

POST

Help with this “Rubik”-themed crypto challenge: ASCII numbers + 443–447 outliers

REDDIT / Embarrassed-Cake-380 / Sep 11, 2025

[](https://www.reddit.com/r/codes/?f=flair_name%3A%22Unsolved%22) I’m stuck on a [practice cryptography challenge](https://ctf.cgii.gob.bo/). I’ve tried modifying rotations, brute-forcing, and analyzing the permutation structure, but I’m not getting closer to the hash. Has anyone tackled something like this before or can suggest resources/methods I should look …

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