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Eccouncil 212-81 Exam - Topic 13 Question 76 Discussion

You are explaining the details of the AES algorithm to cryptography students. You are discussing the derivation of the round keys from the shared symmetric key. The portion of AES where round keys are derived from the cipher key using Rijndael's key schedule is called what?
A) The key expansion phase
B) The round key phase
C) The bit shifting phase
D) The initial round

Eccouncil 212-81 Exam - Topic 13 Question 76 Discussion

Actual exam question for Eccouncil's 212-81 exam
Question #: 76
Topic #: 13
[All 212-81 Questions]

You are explaining the details of the AES algorithm to cryptography students. You are discussing the derivation of the round keys from the shared symmetric key. The portion of AES where round keys are derived from the cipher key using Rijndael's key schedule is called what?

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Suggested Answer: A

The key expansion phase

https://en.wikipedia.org/wiki/Advanced_Encryption_Standard

KeyExpansion -- round keys are derived from the cipher key using the AES key schedule. AES requires a separate 128-bit round key block for each round plus one more.


by Yvette at Aug 18, 2026, 04:05 AM

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