SPN Algorithm31:SPN(x,丌s,丌P,(K1,…,KN+) for rt1 to Nr-1 ④F for i 1 to m do do va <asn(r P(1 丌P(e r u w ⊕K fori←1tom do uio ts(u(o) 6 KNr+ output(y) 1212 SPN