Tag: Crypto

All the articles with the tag "Crypto".

• Christmas CTF 2019 / Christmas Pocket

  27 Dec, 2019

  Christmas CTF 2019 Christmas Pocket write-up — recovering the private key of a knapsack-based public-key scheme by working through the key-generation math.

• X-MAS CTF 2018 / Santa's List

  23 Dec, 2019

  X-MAS CTF 2018 Santa's List write-up — an RSA chosen-ciphertext attack (CCA) that slips past the decryption filter to recover the flag.