Definitions for "Pre-shared key"
Keywords:  ike, passphrase, psk, secret, tkip
A pre-shared key identifies a communicating party during a phase 1 IKE negotiation. It is called "pre -shared" because you have to share it with another party before you can communicate with them over a secure connection.
A shared secret key passed to both parties in a communication flow, using an unspecified manual or out-of-band mechanism.
a shared, secret key that uses IKE for authentication
a sequence of characters whose secrecy depends on the method of distribution and its strength