______ mode is typically used for a general-purpose block-oriented transmission and is useful for high-speed requirements.
A) ECB
B) OFB
C) CFB
D) CTR

Question

Quizplus · Accepted Answer

CTR (Counter) mode is typically used for general-purpose block-oriented transmission and is useful for high-speed requirements. In this mode, the same key is used for encryption and decryption. It converts a block cipher into a stream cipher, enabling arbitrary length data to be encrypted. It also allows parallelization of the encryption process, making it faster. ECB (Electronic Codebook), OFB (Output Feedback), and CFB (Cipher Feedback) modes are also block ciphers but are not as efficient and secure as CTR mode for high-speed requirements.

______ Mode Is Typically Used for a General-Purpose Block-Oriented Transmission