Cryptography CTF writeups

PlaidCTF 2015 – Crypto/Lazy

My knapsack brings all the boys to the yard, and they’re like “that crypto is hard” (note: this flag is not in the flag{} format) PlaidCTF 2015 – Crypto/Lazy The challenge provided a few files: pubkey.txt, ciphertext.txt,, After inspecting the code, it seems that the contents of ciphertext.txt was encrypted using Merkle-Hallman knapsack (MHK) cryptography, […]