Question

The simplest approach to multiple block encryption is known as __________ mode, in which plaintext is handled b bits at a time and each block of plaintext is encrypted using the same key

Answer 1

The simplest approach to multiple block encryption is known as Electronic Codebook (ECB) mode, where each block of plaintext is encrypted using the same key.

Step-by-step explanation:

The simplest approach to multiple block encryption is known as Electronic Codebook (ECB) mode. In ECB mode, the plaintext is divided into fixed-size blocks, typically in binary format. Each block of plaintext is encrypted using the same key, resulting in a corresponding block of ciphertext.

For example, if we have a plaintext consisting of 64 bits and a key of 128 bits, we would divide the plaintext into eight 8-bit blocks. Each block would then be encrypted using the same key to produce eight blocks of ciphertext.

ECB mode is relatively simple and straightforward but has some security limitations, especially when encrypting identical blocks of plaintext as they result in identical blocks of ciphertext.