HP 280m 802.11b Print Server manual 24

Client

Client

Random #

Server

Random #

Server

Public Key

Cryptographic

Key Generation:

PreMasterSecret

Encryption

E(PreMasterSecret)

Figure 26 - Keying Material

The client generates what is called a “pre_master_secret” using the random numbers as well as a function called the key derivation function. This is encrypted with the server’s public key. Only a server with knowledge of the private key would be able to decrypt it. The ability to decrypt the pre_master_secret proves that the server is in possession of the private key – the final proof for the server’s identity.

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