Exit 212-81 EC-Council Certified Encryption Specialist (ECES)
Question 1 of 5
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Q1 Single choice

Modern symmetric ciphers all make use of one or more s-boxes. Both Feistel and non-Feistel ciphers use these s-boxes.

What is an s-box?

  • A

    A substitution box where input bits are replaced

  • B

    A black box for the algorithm implementation

  • C

    A shifting box where input bits are shifted

  • D

    Another name for the round function

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