The home network signature circuit is preferably functional whether or not the network device is powered up.

The home network signature circuit may simply reside between the tip and ring on an HPN adapter.

The invention also provides a method of testing a telephone line for the existence of a signature circuit identifying a home network.

There is provided a signature circuit (1) for quantizing an image signal, calculating an authenticator from the quantization index of the image signal, an embedding the authenticator in the quantization index.

The home network signature circuit includes a series combination of a voltage breakdown device (e.g., Zener diodes) and an impedance (e.g., 200K ohm resistor).

A sensing circuit detects the signature electrical signal from each instance of the circuit.

The resonant frequency of a tank circuit inductively coupled to the sensing circuit serves to identify the object.

A computer reset debouncing circuit has a signature port (9) for inputting a prearranged digital signature, which alters the behavior of the debouncing circuit.

A first output MISR (25) provides a signature for the outputs (27) of the IC (22).

S Indicates street race; N Indicates Night Race; * subject to final FIA World Motor Sport Council approval; ** pending on signature of promoter agreement

The processing circuit is configured to monitor the microphone for a siren signature.

The subsequent signing guarantees the 30th consecutive event at the Circuit de Barcelona-Catalunya, in Montmelo.

The subsequent signing guarantees the 30th consecutive event at the Circuit de Barcelona-Catalunya, in Montmelo.

The subsequent signing guarantees the 30th consecutive event at the Circuit de Barcelona-Catalunya, in Montmelo.

An integrated circuit includes a digital signature module (110) coupled in the integrated circuit so as to receive a time of day signal string from a clock module (120) and digitally sign the string.