Abstract: A band includes a latch body that is movable by pulling a tab. The latch body extends through an opening of the band and secures with a pin located on a head-mountable device. The band can detach from the head-mountable device by pulling the tab, which actuates the latch body and removes the latch body from the pin. A spring (or springs) can bias the latch body toward the opening, causing the latch body to enter the pin. An applied force to the tab can overcome the biasing force provided by the spring(s), and move the latch body away from, and out of, the pin.

Abstract: An authentication system is disclosed that includes at least one station and a host. Each station having a memory for storing a plurality of authentication items. An authentication control element, such as a key, is constructed from a part of the authentication items which is selected for each message. An authenticator authenticates the message substantially under the control of the authentication control element constructed for the message. The authenticated message is sent to the host. The host having a memory for storing the authentication items of each station. The authentication control element is determined from the received authenticated message. A verifier is used for, under control of the authentication control element, verifying the authenticity of the received message.