( < substitution-permutation network,
"asendus-permutatsioonteisendus")

olemus
operatsioonisari plokkšifrite algoritmides (AES jt, C. Shannon, 1949);
sisendandmeteks on avateksti plokk ja võti, neile rakendatakse krüptogrammi plokkide saamiseks iteratiivselt mitme raundina
S-teisendusi ja P-teisendusi, kasutades raundivõtmeid;
sobib teostamiseks riistvaras
= a series of linked mathematical operations used in block cipher algorithms such as AES, taking a block of the plaintext and the key as inputs, and applying several alternating rounds of substitution boxes (S-boxes) and permutation boxes (P-boxes) to produce the ciphertext block

ülevaateid
https://en.wikipedia.org/wiki/Substitution%E2%80%93permutation_network

http://barrywatson.se/crypto/crypto_sp_network.html

http://crypto.stackexchange.com/questions/32601/how-do-substution-permutation-networks-work

https://www.iacr.org/conferences/crypto2012/slides/1-5-Miles.pdf

http://www.powershow.com/view1/1a9fb0-ZDc1Z/Claude_Shannon_and_Substitution-Permutation_Ciphers_powerpoint_ppt_presentation

https://www.youtube.com/watch?v=8YQw8g6Uwd8