diff options
| -rw-r--r-- | buch/papers/mceliece/example_code/mceliece_simple.py | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/buch/papers/mceliece/example_code/mceliece_simple.py b/buch/papers/mceliece/example_code/mceliece_simple.py index 3f17504..bac3b42 100644 --- a/buch/papers/mceliece/example_code/mceliece_simple.py +++ b/buch/papers/mceliece/example_code/mceliece_simple.py @@ -293,33 +293,35 @@ def blocks4_to_str(blocks): string+=chr(char) return string -#shared attributes: -n=7 -k=4 -t=1 +if __name__ == '__main__': -#private key(s): -g=Poly([1,1,0,1]) #generator polynom for 7/4 linear code (from table, 1.0 + 1.0·x¹ + 0.0·x² + 1.0·x³) -P_M=gen_perm_M(n) #create permutation matrix -G_M=create_linear_code_matrix(n, k, g) #linear code generator matrix -S_M, S_inv=create_rand_bin_M(k, True) #random binary matrix and its inverse -P_M_inv=P_M.T #inverse permutation matrix - -syndrome_table=create_syndrome_table(n, g) #part of linear-code decoder -linear_code_decoder=lambda c:decode_linear_code(c, g, syndrome_table) - -#public key: -pub_key=(P_M @ G_M @ S_M)%2 - - -msg_tx='Hello World?' - -blocks_tx=str_to_blocks4(msg_tx) -encrypted=encrypt(blocks_tx, pub_key, t) - -blocks_rx=decrypt(encrypted, P_M_inv, linear_code_decoder, S_inv) -msg_rx=blocks4_to_str(blocks_rx) - -print(f'msg_rx: {msg_rx}') + #shared attributes: + n=7 + k=4 + t=1 + + #private key(s): + g=Poly([1,1,0,1]) #generator polynom for 7/4 linear code (from table, 1.0 + 1.0·x¹ + 0.0·x² + 1.0·x³) + P_M=gen_perm_M(n) #create permutation matrix + G_M=create_linear_code_matrix(n, k, g) #linear code generator matrix + S_M, S_inv=create_rand_bin_M(k, True) #random binary matrix and its inverse + P_M_inv=P_M.T #inverse permutation matrix + + syndrome_table=create_syndrome_table(n, g) #part of linear-code decoder + linear_code_decoder=lambda c:decode_linear_code(c, g, syndrome_table) + + #public key: + pub_key=(P_M @ G_M @ S_M)%2 + + + msg_tx='Hello World?' + + blocks_tx=str_to_blocks4(msg_tx) + encrypted=encrypt(blocks_tx, pub_key, t) + + blocks_rx=decrypt(encrypted, P_M_inv, linear_code_decoder, S_inv) + msg_rx=blocks4_to_str(blocks_rx) + + print(f'msg_rx: {msg_rx}')
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