Outline

System Security Considerations

WWW Client

WWW Server

Security Requirements for Sophisticated Web Use

Current State of Web Security

Basic Authentication

Network Address Filtering

Combining Basic Auth and IP-Filtering

Review of Relevant Cryptographic Mechanisms

Symmetric-Key Cryptography

Public-Key Cryptography

Adding Cryptographic Features to the Web

A Few Prominent Web Security Systems

PGP/PEM Authentication/Encryption

EIT's Secure-HTTP and Secure NCSA Mosaic

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