{ DESCBC (default) } /KEY_ALGORITHM= { AESmmmkkk } { } Where mmm is the mode CBC, ECB, CFB, or OFB; and kkk is 128, 192, or 256 bits. Cipher Block Chaining (CBC) and Electronic Code Book (ECB) are 16-byte block modes, meaning blocks are padded to 16 bytes if necessary during encryption. The padding is removed during decryption. Cipher Feedback (CFB) and Output Feedback (OFB) are 8-bit character stream mode emulation, useful in data communications and where no padding is required. Note that /KEY_ ALGORITHM=AES is a shortcut for specifying AESCBC128. The algorithm by which the random key and the initialization vector are protected within the encrypted file. Specify the same algorithm (AES or DES) that you used to encrypt the file and create the key, if not, the default is DESCBC.