BUAA-CST Spring 2019 Cryptography Experiment Project Code (Python).

• Python 3
• multiprocessing
• numpy [optional]
• matplotlib [optional]

• utils/ - Some useful utilities in cryptography.
  • bigInt.cpp - Big integer arithmetic in C++. [ref]
  • bitarray.py - A bit array class.
  • matrix.py - Arithmetic of matrices.
  • residue_field.py - Residue field Z_p.
  • extension_field.py - Galois Field GF[x]/(p(x)).
  • galois_field.py - Galois Field GF_2^m.
• algorithms/ - Basic algorithms in cryptography.
  • prime_sieve.py - Generate primes with Sieve of Eratosthenes.
  • exgcd.py - Extended Euclidean algorithm.
  • power.py - Modular exponentiation algorithm.
  • crt.py - Chinese Remainder Theorem (CRT).
  • prime_test.py - Probabilistic primality testing. (Miller–Rabin/Fermat/Solovay–Strassen)
  • prime_root.py - Generate prime roots in Z_p.
  • prime_poly.py - Generate prime polynomial in GF_2^m.
  • jacobi.py - Calculate the Jacobi symbol.
• classical/ - Classical Cryptography.
  • affine.py - Affine Cipher.
  • vigenere.py - Vigenere Cipher.
  • vernam.py - Vernam Cipher.
  • crack_single_table.py - Crack simple substitution cipher using letter frequency analysis.
  • hill.py - Hill cipher and the cracker.
• des/ - Data Encryption Standard (DES).
  • des_utils.py - Some utilities in DES.
  • des.py - A 64-bit DES block cipher.
  • diff_crypt.py - Use differential cryptanalysis to attack DES cipher.
  • triple_des.py - A 3-DES block cipher.
  • s_des.py - A simplified DES cipher.
  • mitm.py - Use meet-in-the-middle attack on double S-DES.
• aes/ - Advanced Encryption Standard (AES).
  • aes.py - A 128-bit AES block cipher.
  • fast_aes.py - A look-up-table implementation of AES to accelerate the algorithm.
  • block_cipher.py - Some block cipher modes of operation. (ECB/CBC/CFB)
  • cipher_gui.py - A simple GUI for our block cipher.
• rsa/ - Rivest-Shamir-Adleman (RSA) cryptosystem.
  • knapsack_cipher.py - A public-key cryptosystem based on knapsack problem.
  • rsa.py - A 1024-bit RSA public-key cryptosystem.
  • rsa_oaep.py - RSA with Optimal Asymmetric Encryption Padding (OAEP).
• ecc/ - Elliptic-curve cryptography (ECC).
  • ecc.py - The basic elliptic curve arithmetic.
  • diffie_hellman_ecc.py - The anonymous key agreement protocol over elliptic curves. (Also ECDH)
  • elgamal_ecc.py - The ElGamal public-key cryptosystem over elliptic curves.
  • sm2.py - The SM2 (GM/T 0003-2012) public-key cryptography standard.
• hash/ - Cryptographic hash functions.
  • sha_utils.py - Some utilities for Secure Hash Algorithm (SHA) family.
  • sha1.py - The SHA-1 (Secure Hash Algorithm 1) hash function.
  • sha3.py - The SHA-3 (Secure Hash Algorithm 3) hash function. (Also Keccak)
  • hmac.py - A HMAC (Hash-based Message Authentication Code) function with SHA.
  • birthday_attack.py - A birthday attack example on SHA3-16.
  • message_variants.py - Generate arbitrary number of message variants.
• dsa/ - Digital signature algorithms.
  • dsa.py - The NIST proposed DSA in Digital Signature Standard (DSS).
  • elgamal_dsa.py - The ElGamal signature scheme based on DLP.
  • schnorr_dsa.py - The Schnorr signature scheme based on DLP.
  • sm2_dsa.py - The SM2 (GM/T 0003-2012) digital signature algorithm based on ECC.
• testdata/ - Test data folder.
  • text.txt - A UTF-8 encoded text file contains short Chinese and English sentences.

Simplified Chinese Only!!!

• ex1.pdf
  • prime_sieve.py
  • exgcd.py
  • power.py
  • crt.py
• ex2.pdf
  • prime_test.py
  • galois_field.py
  • prime_root.py
  • prime_poly.py
• ex3.pdf
  • classical
• ex4.pdf
  • des
• ex5.pdf
  • aes.py
  • block_cipher.py
  • cipher_gui.py
• ex6.pdf
  • fast_aes.py
• ex7.pdf
  • bigInt.cpp
  • rsa
• ex8.pdf
  • ecc
• ex9.pdf
  • hash
• ex10.pdf
  • dsa

This project is licensed under the terms of the MIT license.

Don't copy, learn.