Security Risks of Internet Communication

Eavesdropping

• Intermediaries listen in on private conversations
• Solution: Encryption (public or private-key)

Manipulation

• Intermediaries change information in a private communication
• Solution: Methods for preserving data integrity (one-way hash functions and Message Authentication Codes (MACs))

Impersonation

• A sender or receiver communicates under false ID
• Solution: Authentication (digital signature, etc.)