What is the key size of the International Data Encryption Algorithm (IDEA)?
A.
64 bits
B.
128 bits
C.
160 bits
D.
192 bits
Explanation:
International Data Encryption Algorithm (IDEA) is a block cipher that operates on 64-bit blocks of data, which is
divided into 16 smaller blocks, with eight rounds of mathematical functions performed on each to produce a key
that is 128 bits long.
Incorrect Answers:
A: The block of data that the International Data Encryption Algorithm (IDEA) operates on is 64 bit in size.
C: SHA produces a 160-bit hash value.
D: Tiger produces a hash size of 192 bits.Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 809, 810, 826