YAARX: Yet Another ARX Toolkit
0.1
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Header file for xtea-add-threshold-search.cc. More...
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Functions | |
void | xtea_add_threshold_search (const int n, const int nrounds, const uint32_t npairs, const uint32_t round_key[64], const uint32_t round_delta[64], gsl_matrix *A[2][2][2], gsl_matrix *AA[2][2][2], double B[NROUNDS], double *Bn, const differential_t diff_in[NROUNDS], differential_t trail[NROUNDS], uint32_t lsh_const, uint32_t rsh_const, std::multiset< differential_t, struct_comp_diff_p > *diff_mset_p, std::set< differential_t, struct_comp_diff_dx_dy > *diff_set_dx_dy) |
void | xtea_add_trail_search (uint32_t key[4], uint32_t round_key[64], uint32_t round_delta[64]) |
Header file for xtea-add-threshold-search.cc.
void xtea_add_threshold_search | ( | const int | n, |
const int | nrounds, | ||
const uint32_t | npairs, | ||
const uint32_t | round_key[64], | ||
const uint32_t | round_delta[64], | ||
gsl_matrix * | A[2][2][2], | ||
gsl_matrix * | AA[2][2][2], | ||
double | B[NROUNDS], | ||
double * | Bn, | ||
const differential_t | diff_in[NROUNDS], | ||
differential_t | trail[NROUNDS], | ||
uint32_t | lsh_const, | ||
uint32_t | rsh_const, | ||
std::multiset< differential_t, struct_comp_diff_p > * | diff_mset_p, | ||
std::set< differential_t, struct_comp_diff_dx_dy > * | diff_set_dx_dy | ||
) |
Automatic search for ADD differential trails in block cipher XTEA using pDDT.
n | index of the current round: . |
nrounds | total number of rounds (NROUNDS). |
npairs | number of chosen plaintext pairs (NPAIRS). |
round_key | all round keys for the full XTEA. |
round_delta | all round constants for the full XTEA. |
A | transition probability matrices for (adp_xor_sf). |
AA | transition probability matrices for XOR with fixed input (adp_xor_fixed_input_sf). |
B | array containing the best differential probabilities for i rounds: . |
Bn | the best found probability on rounds, updated dynamically. |
diff_in | array of differentials. |
trail | best found differential trail for nrounds . |
lsh_const | LSH constant (TEA_LSH_CONST). |
rsh_const | RSH constant (TEA_RSH_CONST). |
diff_mset_p | set of differentials (the pDDT) ordered by probability p. |
diff_set_dx_dy | set of differentials (the pDDT) ordered by index . |
The outline of the array of bounds is the following:
void xtea_add_trail_search | ( | uint32_t | key[4], |
uint32_t | round_key[64], | ||
uint32_t | round_delta[64] | ||
) |
Search for ADD differential trails in block cipher XTEA: wrapper function for tea_add_threshold_search.
key | cryptographic key of XTEA. |
round_key | all round keys for the full XTEA. |
round_delta | all round constants for the full XTEA. |
Algorithm Outline:
The procedure operates as follows: