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Task 1: In maximum150 wordsanswer the question below. Follow APA guidelines. Must use at least two references and citations

Discuss the notion of keys in cryptography.Is a block better than a stream? (maximum150 words).

References and in-text citations must be APA compliant.

Task 2: answer the questions below. Follow APA guidelines. Must use at least two references and citations

(1) Compare and contrast the characteristics of classic and modern cryptography.
(Maximum: Half a Page, double-spaced)

(2) Describe the evolution of cryptography by listing the main four stages.
(Maximum: Half a Page, double-spaced)

References and in-text citations must be APA compliant.

Separate documents for each topic and Must use at least two references and citations.for each topic