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Which of the following is a requirement for symmetric encryption?

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What are the two classes of symmetric encryption?

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What is the main objective of a brute-force attack?

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In a brute-force attack, how many keys on average must be tried to achieve success?

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Which mode of operation is described as handling plaintext one block at a time and using the same key for each block?

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What is a major security issue with ECB mode for lengthy messages?

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Why might ECB mode not be secure for messages with predefined fields?

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What is a benefit of ECB mode in terms of speed?

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What effect does an error in one block have when using ECB mode?

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What is one of the primary weaknesses of ECB mode highlighted in the analysis?

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