Patent ID: 8478695
Filing Date: 2013-07-02
Classification: G07B

Abstract:
1. A postal security device for conducting a plurality of postal franking transactions, comprising: a memory programmed to store a descending register value and an ascending register value; a processor programmed to generate accounting data and postal data elements for each postal franking transaction, the accounting data comprising the descending register value, the ascending register value and a postage value request; a cryptographic engine comprising a plurality of cryptographic processors, each cryptographic processor comprising a memory storing an ascending sub-register value and a descending sub-register value for the cryptographic processor; and a multiplexer programmed to sequentially route the accounting data and the postal data elements of each of the postal franking transactions to one of the cryptographic processors; wherein each of the cryptographic processors is assigned to a subset of the plurality of postal franking transactions; wherein each of the cryptographic processors is programmed to generate a code to authenticate the accounting data and the postal data elements for each of the postal franking transactions in the subset of each cryptographic processor; and wherein each of the cryptographic processors is programmed to verify at least one of the associated sub-register values with the corresponding register value prior to performing a franking transaction.