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Question 432 - 312-50v12 discussion

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Harper, a software engineer, is developing an email application. To ensure the confidentiality of email messages. Harper uses a symmetric-key block cipher having a classical 12- or 16-round Feistel network with a block size of 64 bits for encryption, which includes large 8 x 32-bit S-boxes (S1, S2, S3, S4) based on bent functions, modular addition and subtraction, key-dependent rotation, and XOR operations. This cipher also uses a masking key(Km1)and a rotation key (Kr1) for performing its functions. What is the algorithm employed by Harper to secure the email messages?

A.
CAST-128
Answers
A.
CAST-128
B.
AES
Answers
B.
AES
C.
GOST block cipher
Answers
C.
GOST block cipher
D.
DES
Answers
D.
DES
Suggested answer: A
asked 18/09/2024
David Miller
32 questions
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