Methods and systems for generating encryption keys using random bit sequences

摘要

A security key, such as an encryption key, is generated so as to make it more difficult for eavesdroppers to identify the key. Specifically, a cryptographically secure random number generator (301) generates a random bit sequence (302) that is included in a seed (305). This random seed is provided along with a negotiated master secret (306) to a key generation module (307). The key generation module may implement a pseudo random function that is in accordance with the Transport Layer Security (TLS) protocol or the Wireless Transport Layer Security (WTLS) protocol. This key may then be used to encrypt a plain text message (203) to form an encrypted data packet (204). The encrypted data packet also includes the random seed (305) in unencrypted form. The encrypted data packet may be transmitted over a public network to a recipient with reduced risk of eavesdropping.