Exam CISSP Topic 4 Question 830 Discussion

Actual exam question for ISC's CISSP exam
Question #: 830
Topic #: 4
What is the key size of the International Data Encryption Algorithm (IDEA)?

Suggested Answer: B Vote an answer

Explanation/Reference:
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.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 809, 810, 826

by Bernie at Sep 12, 2026, 11:13 AM

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