Random Nonces

Random nonces (numbers used once) are used in SSL handshakes to provide protection against the SSL communication being eavesdropped on and replayed. If an attacker was to attempt to record such a handshake and then to replay the signal in the hope of achieving the same response as the original signal then this will not be possible as the nonce cannot be used twice and the replay attack would fail. It is highly unlikely that the attacker could guess or produce enough replays using the next expected nonce to achieve as successful result.