#oldcrypto
[Blog] I have updated my post on the old pen-and-paper cryptographic systems following the v0.4.1 release.

It includes a fixed VIC Cipher implementation and a new SECOM implementation.

https://blog.keltia.net/old-pencil-and-paper-cryptosystems/

#crypto #oldcrypto
February 28, 2026 at 7:10 PM
Trying to fix a bug in one's code sometimes means... you forget to eat.

oopsie.

#mylife #rust #oldcrypto
March 9, 2026 at 11:33 PM
Fixed a few issues in ADFGVX & Square ciphers, some performance improvement and fix a bad memory usage.

Here is v0.6 of old-crypto-rs.

https://github.com/keltia/old-crypto-rs/releases/tag/v0.6.0

#rust #oldcrypto #penandpaper #cryptography
March 17, 2026 at 2:02 PM
Of course, it just after doing a release that you find a bug (in the Playfair cipher).

v0.4.2 is now out.

https://github.com/keltia/old-crypto-rs/releases/tag/v0.4.2

#crypto #oldcrypto
March 1, 2026 at 1:11 PM
For those interested in old, paper-and-penvil kind of historical crypto systems, I re-implemented some of these long ago in Ruby and Go.

Now, in Rust as well, because, why not? :)

https://github.com/keltia/old-crypto-rs

#cryptography #history #oldcrypto #rust 🦀
January 5, 2026 at 2:15 PM