README.md

Compress-Lattice-Crypto

This program is a proof-of-concept implementation of key, signature, and ciphertext size reductino for lattice-based cryptography, written in SageMath 9.0.

Load the code

load('LatticeCompression.py')

Parameter Settings, public key

Kyber512

q = 3329
n = 256
k = 2

Falcon-512, public key

q = 12289
n = 512
k = 1

CRYSTALS-Dilithium NIST security level 1, (part of) signature

q = 2^17 + 90
n = 256
k = 3

Generate a sample key

A random element in R_q^k is generated.

t = get_key(n, k, q)
print_key(t, n, k, q)

Compress key

num = compress_key(t, n, k, q)

Decompress key

decomp = decompress_key(num, n, k, q)

Test the compression/decompression

compare_keys(t, decomp, n, k,q)