A liquid ejecting head includes a flow channel forming substrate having pressure generation chambers communicating with a nozzle opening and arranged in parallel along a lateral direction. The interface exposes the functionality of signing data, decrypting data encrypted using a public key, and re-encrypting data encrypted using the public key exported by the interface to a different authenticated principal. A second traction drive provides infinitely variable speed ratios through a continuously variable transmission. Accordingly, capacitance and a breakdown voltage are increased and charge leakage and retention properties are thus improved. With such a rotor, high speeds and a high operational safety can be ensured. The energy generator includes: flexible and stretchable first and second electrode substrates; and an energy generation layer, which is provided between the first and second electrode substrates and includes a dielectric elastomer for generating electrical energy from a transformation thereof.