Security module and method for securing computerized postal registers against manipulation
First Claim
1. A security module for securing computerized postal registers against manipulation, comprising:
- a first data processing unit containing an internal memory;
a second data processing unit;
a non-volatile memory and a program memory containing a program, each connected to said first data processing unit and to said second data processing unit;
said first data processing unit and said second data processing unit participating in a plurality of accounting operations resulting in postal register data being stored in said non-volatile memory, and said first data processing unit operating according to said program to check validity of postal register data stored in said non-volatile memory from a previous accounting procedure, and to calculate new postal register data in advance of a current accounting procedure if said postal register data stored for said previous accounting procedure are validated, and to form a code dependent on said new postal register data and to store said code in at least one of said non-volatile memory and said internal memory; and
said second data processing unit operating according to said program to form postal register data for said current accounting operation and to store said postal register data for said current accounting operation in said non-volatile memory associated with said code.
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Accused Products
Abstract
In a data security and a security module, first and second data processing units are employed having non-volatile memories for postal register data. At a first point in time at least following letter insertion and following a check of the previously valid accounting data on the basis of an authorization code, the first data processing unit undertakes an advance calculation of the new postal register setting, which is made taking the previously set postage value into consideration, and forms a new authorization code. At a second point in time, the second data processing unit undertakes an accounting with calculation of the new postal register setting, which occurs taking the previously set postage value into consideration. A storage of the pre-calculated, new authorization code and of the new postal register set determined by the second data processing unit in the non-volatile memories subsequently ensue.
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Citations
15 Claims
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1. A security module for securing computerized postal registers against manipulation, comprising:
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a first data processing unit containing an internal memory;
a second data processing unit;
a non-volatile memory and a program memory containing a program, each connected to said first data processing unit and to said second data processing unit;
said first data processing unit and said second data processing unit participating in a plurality of accounting operations resulting in postal register data being stored in said non-volatile memory, and said first data processing unit operating according to said program to check validity of postal register data stored in said non-volatile memory from a previous accounting procedure, and to calculate new postal register data in advance of a current accounting procedure if said postal register data stored for said previous accounting procedure are validated, and to form a code dependent on said new postal register data and to store said code in at least one of said non-volatile memory and said internal memory; and
said second data processing unit operating according to said program to form postal register data for said current accounting operation and to store said postal register data for said current accounting operation in said non-volatile memory associated with said code. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a franking apparatus which receives a letter therein having a postage value associated therewith and a postal register for participating in an accounting operation associated with said postage value, a method for securing said postal register against manipulation comprising:
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at a first point in time following receipt of said letter in said apparatus, making an advance calculation of a new postal register setting in a first data processing unit, said new postal register setting being dependent on said postage value, and in said first data processing unit also checking validity of postal register data from a previous accounting based on a first authorization code, associated with said postal register data from said previous accounting, and, if said postal register data from said previous accounting are validated forming a second authorization code for said new postal register setting;
at a second point in time, performing a calculation of a new postal register data setting in a second data processing unit dependent on said postage value; and
storing the second authorization code in a memory together with the new postal register data setting calculated by said second data processing unit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification