AES加密模式（ECB,CBC,CFB,OFB,CTR）

NIST标准，AES加密模式介绍包括（ECB,CBC,CFB,OFB,CTR）。Thisrecommendationdefinesfiveconfidentialitymodesofoperationforusewithanunderlyingsymmetrickeyblockcipheralgorithm:ElectronicCodebook(ECB),CipherBlockChaining(CBC),CipherFeedback(CFB),OutputFeedback(OFB),andCounter(CTR).Usedwithanunderlyingblockcipheralg