A liquid insurance contract comprises a security which is traded or tradable and which has cash flows to the issuer based upon a liability whose exact value is unknown at the time of issuance. The present invention provides a method and an intermediate node that prioritizes the processing of a packet based on one or more size-based criteria, the packet comprising one or more headers and an encrypted payload. The coil elements are disposed in zones having more than two effective centres and exhibiting mutually opposing responses to the remote field. The voltage-limit circuit includes a transistor coupled between a voltage supply line and the LDO regulator circuit and a gate driven by the charge pump.