Proposed design

• Environment model
• Security policy
• Authentication option
  • Why use PGP?
  • Design goals
  • PGP authentication scheme
    • Authentication information
    • Format of the ``challenge''
    • Selecting encryption keys
  • Command name and codes
  • Sub-option command meanings
  • Example
• Encryption option
  • Design goals
  • Placement in the protocol model
  • Selecting an encryption algorithm
  • Modified CFB mode
  • Command name and codes
  • Command meanings and usage
  • Example
• Integrity option
  • Design goals
  • The integrity information
  • Placement in the protocol model
  • Generating the integrity information
    • Integrity type: 32-bit CRC and IDEA in modified CFB mode
  • Command name and codes
  • Command meanings and usage
  • Implementation rules
• The test implementation
  • The framework
  • The PGP authentication implementation
  • Testing