SSCP: Systems Security Certified PractitionerDemo

By ISC · Question Mode

QuestionQ656

Cryptography

Which of the following statements about the Rijndael block cipher algorithm is false?

  • A The design of Rijndael was strongly influenced by the design of the block cipher Square.
  • B A total of 25 combinations of key length and block length are possible
  • C Both block size and key length can be extended to multiples of 64 bits.
  • D The cipher has a variable block length and key length.
Explanation

Rijndael independently supports block and key lengths from 128 through 256 bits in 32-bit increments, including 160- and 224-bit sizes. Thus, its sizes are not restricted to multiples of 64 bits. The five possible block sizes and five possible key sizes produce 25 combinations.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!