# Asymmetric Encryption Algorithms

This class of algorithms employs a different key for encryption and decryption. Furthermore, the decryption key cannot be derived from the encryption key. This type of algorithm is also referred to as a "public-private key-based algorithm." The public portion of the name stems from the fact that the public key can be known by anybody (it's not a secret), but the private key portion should be a secret. The public and private keys are, however, mathematically related.

Algorithms that use asymmetric encryption are computationally more demanding than symmetric algorithms and as such are much slower in execution. The ease of distribution and management of the keys used for encryption and decryption are better than symmetric-based solutions. Some examples of asymmetric algorithms include Diffie-Hellman, ElGamal, and Merkle-Hellman Knapsack.

## In this tutorial:

- Securing Wireless Networks
- Security Background
- Security Services
- Cryptographic Concepts and Terms
- Encryption and Decryption
- Keyspace
- Exclusive OR (XOR)
- Algorithm
- Asymmetric Encryption Algorithms
- Public-Private Key Cryptography
- Cipher
- Concealment Ciphers vs. Running Key Ciphers
- Stream Ciphers vs. Block Ciphers
- Cipher Examples
- Cipher Implementations
- Wi-Fi Protected Access
- TKIP/WPA
- Wi-Fi Protected Access 2 (WPA2)
- CCMP/AES
- Hash Functions
- EAP
- EAP Entities
- EAP Grammar
- EAP Types
- EAP-TTLS
- EAP-PSK
- EAP-SIM
- EAP-AKA
- IEEE 802.11i
- Four-Way Handshake
- IEEE 802.11i Considerations