crypto

A collection of 19 posts
Making and Breaking Ciphers with Commodore 64 Part 9 - Finding Smallish Primes
C64

Making and Breaking Ciphers with Commodore 64 Part 9 - Finding Smallish Primes

Recap So far we've * Reversed a string [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-1/] * Shifted bits left and right (mostly right) [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-2-the-shift-cipher/] * Brute forced a known simple cipher [https://imapenguin.com/making-and-breaking-ciphers-with-a-commodore-64-part-3-the-caesar-cipher/] * Channeled our inner John Connor by cracking ATM machines [https://imapenguin.com/making-and-breaki
6 min read
Making and breaking Ciphers on the Commodore 64 Part 8 - RC4
C64

Making and breaking Ciphers on the Commodore 64 Part 8 - RC4

Recap So far in this 8 part series on doing weird things with Ciphers on old computers we've: * Reversed a string [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-1/] * Shifted bits left and right (mostly right) [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-2-the-shift-cipher/] * Brute forced a known simple cipher [https://imapenguin.com/making-and-breaking-ciphers-with-a-commodore-64-part-3-the-caesar-cipher/] * Channeled our inner John
9 min read
Making and breaking Ciphers on the Commodore 64 Part 7 - Pseudo Random  with Linear Congruential Generators
C64

Making and breaking Ciphers on the Commodore 64 Part 7 - Pseudo Random with Linear Congruential Generators

So far in this 7 part (shocked I've made it through 7!) series on doing weird things with Ciphers on old computers we've: * Reversed a string [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-1/] * Shifted bits left and right (mostly right) [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-2-the-shift-cipher/] * Brute forced a known simple cipher [https://imapenguin.com/
8 min read
Making and Breaking Ciphers with a Commodore 64 - Part 6: XOR is Magical - Data recovery
C64

Making and Breaking Ciphers with a Commodore 64 - Part 6: XOR is Magical - Data recovery

Review So far we've: * Reversed a string [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-1/] * Shifted bits left and right (mostly right) [https://imapenguin.com/cracking-codes-with-python-er-commodore-part-2-the-shift-cipher/] * Brute forced a known simple cipher [https://imapenguin.com/making-and-breaking-ciphers-with-a-commodore-64-part-3-the-caesar-cipher/] * Faked it, but then looking for a 4 digit known pin [https://imapenguin.com/making-and-breaking-c
3 min read