The command office has asked for a presentation on security mechanisms including access control models, authentication, authorization and encryption. Describe differences between them and identify situations where appropriate. Discuss how encryption relates to storage, network traffic, secure Web access, and the e-mailing of documents. One topic of concern is symmetrical versus public key.

The presentation should include the following information:

Comparison of security mechanisms

An explanation of public key cryptography

Historical background of the development of encryption

Typical uses of public key cryptography

Symmetrical versus public key

Encryption and how it relates to storage, network traffic, secure Web access and e-mail