Crypto Basics

2 types of cryptography:

• Symmetric ( uses single key)
• Asymmetric (aka public key)

Symmetric (uses single key):

Pros:

• Perserves confidentiality
• Increased speed over many non sym
• Ensures simplicity
• Provides authenticity

Cons:

• Key management issues
• Lack of nonrepudiation features

Common Algorithms:

• DES, 3DES
• Blowfish
• IDEA
• RC2,4,5,6
• AES or Rijndael (Advanced Encryption Standards)
• Two fish

Asymmetric (aka public key):

• PKI and digital certificates
• Hashing