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Questions and Answers
What is the primary purpose of a Feistel cipher's block size?
What is the primary purpose of a Feistel cipher's block size?
- To decrease encryption/decryption speed
- To increase encryption/decryption speed
- To achieve greater resistance to brute-force attacks
- To achieve greater security through diffusion (correct)
Why is a larger key size desirable in a Feistel cipher?
Why is a larger key size desirable in a Feistel cipher?
- To achieve greater security through diffusion
- To decrease encryption/decryption speed
- To achieve greater resistance to brute-force attacks (correct)
- To increase encryption/decryption speed
What is the tradeoff associated with larger block sizes in a Feistel cipher?
What is the tradeoff associated with larger block sizes in a Feistel cipher?
- Decreased encryption/decryption speed (correct)
- Increased encryption/decryption speed
- Reduced security and diffusion
- Increased resistance to brute-force attacks
Why has the new AES chosen a 128-bit block size instead of the traditional 64-bit block size?
Why has the new AES chosen a 128-bit block size instead of the traditional 64-bit block size?
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What effect does a larger key size have on encryption/decryption speed in a Feistel cipher?
What effect does a larger key size have on encryption/decryption speed in a Feistel cipher?
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