In cryptography , an SP-network , or substitution-permutation network -LRB- SPN -RRB- , is a series of linked mathematical operations used in block cipher algorithms such as AES -LRB- PERSON@1 -RRB- .

In cryptography , an SP-network , or substitution-permutation network -LRB- SPN -RRB- , is a series of linked mathematical operations used in block cipher algorithms such as AES .
