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Answer each topic in at least two paragraphs.

Topic 1: List and briefly discuss categories of security services.

Topic 2: Brief discuss the Playfair cipher.

Topic 3: Discuss how the Data Encryption Standard (DES) works.

Topic 4: Discuss the strength of the Data Encryption Standard (DES).

Topic 5: Briefly discuss the main difference between public key cryptography and DES

Topic 6: Briefly discuss the RSA encryption algorithm.

Topic 7: Briefly discuss, using your own experience, various virtual private networks and various access control approaches.

Topic 8: Briefly discuss secure e-mail communications using cryptographic protocols and secure wireless communications using cryptographic protocols.

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