Encryption techniques
Symmetric encryption: (Eg: DES, RC-4)
- Share a secret (“key”)
- Encrypt text based upon the shared secret
- Longer key (eg: 128-bits) => more secure
- Advantages:
- Less CPU intensive
- Provides integrity verification and privacy
- Disadvantages:
- Keys have to somehow reach receivers
- Need one key for every receiver
- Need separate authentication infrastructure