PERSON@1 vs. PERSON@2 is a substitution-linear transformation network with ten , twelve , or fourteen rounds , depending on the key size , and with block sizes of NUMBER@1 bits , NUMBER@2 bits , or NUMBER@3 bits , independently specified .

Serpent has a block size of NUMBER@1 bits and supports a key size of NUMBER@1 , NUMBER@2 or NUMBER@3 bits .
