A request from a first processor for access to a shared resource in a computing system is received, and access is provided to the shared resource by the first processor at a first clock frequency. A light source section is arranged in a subject side of the light receiving section, and is provided with a light emitting section that illuminates the subject and a plurality of transmissive sections that transmits incident light to the light receiving section side. A device for implementing this method is also included. The intermediate layer includes at least one honeycomb layer of fiber composite honeycomb consisting of fiber material embedded in a resin matrix that has been applied coaxially around the longitudinal axis. The protocol includes the steps of exchanging the ephemeral public keys between the correspondents for computing a shared secret at each correspondent and utilizing the shared secret to obtain a common key, wherein the validity of the ephemeral public keys is checked by the recipient thereof prior to use of the common key.