IKE (Internet Key Exchange)

IKE (Internet Key Exchange) is a key exchange mode for ISAKMP. IKE is used to securely exchange encryption keys as part of building a VPN tunnel.

IKE supports the following encryption algorithms:

• DES-CBC
• IDEA-CBC
• Blowfish-CBC
• RC5-R16-B64-CBC
• 3DES-CBC
• CAST-CBC

IKE supports the following hash algorithms:

• MD5
• SHA
• Tiger

IKE supports the following authentication methods:

• Pre-shared key
• DSS signatures
• RSA signatures
• Encryption with RSA
• Revised encryption with RSA

IKE utilizes the Diffie-Hellman asymmetric cipher for key exchange.

IKE is fully documented in RFC 2409: The Internet Key Exchange (IKE).