A method and computer program product for using a vibration signature as an authentication key to authorize access of a user computer to a network. A vibration device generates a vibration signal of the vibration signature. In one embodiment, a router detects and validates the vibration signal, and then the router starts a session of connecting the user computer to the network. In another embodiment, the user computer decodes the vibration signal of the vibration signature to a security set identifier and a security key, and then sends to a router. In response to validating the security set identifier and the security key, the router starts a session of connecting the user computer to the network.