Question

________________ was created by David Wheeler and Roger Needham and first publicly presented in 1994. It is a simple algorithm, easy to implement in code. It is a Feistel cipher that uses 64 rounds (note this is a suggestion, it can be implemented with fewer or more rounds). The rounds should be even since they are implemented in pairs called, cycles. it uses a 128-bit key operating on a 64-bit block. It also uses a constant that is defined as 232/the golden ratio. A) CAST-128

B) TEA (Tiny Encryption Algorithm)

C) XTEA (XTEA Extended Tiny Encryption Algorithm)

D) Hasty Pudding Cipher

Answer 1

TEA (Tiny Encryption Algorithm), created by David Wheeler and Roger Needham, is identified by its use of 64-bit blocks, 128-bit key, and the involvement of a constant based on the golden ratio.

Step-by-step explanation:

The algorithm created by David Wheeler and Roger Needham and first publicly presented in 1994 is B) TEA (Tiny Encryption Algorithm). This simplicity and ease of implementation are defining characteristics of TEA. The algorithm operates on a 64-bit block and uses a 128-bit key, with a standard implementation of 64 rounds, which, as mentioned, can vary but are usually implemented in pairs, or cycles. A unique aspect of TEA is the use of a constant derived from the division of 232 by the golden ratio. This constant helps in the process of diffusion during the encryption rounds, giving a certain amount of mathematical elegance and security to the cipher.