US 2008/0244217 A1 · SAFETY MODULE FOR A FRANKING MACHINE

Abstract

The invention relates to a safety module for the electronic data processing, with a safety core comprising a core processor, and connected therewith, a core memory and a core interface, the core processor being adapted to import via the core interface, to verify and with successful verification to store and to activate programs/data sets in the core memory. It is characterized by that the safety core is connected by the core interface with a mass storage of the safety module arranged outside of the safety core, wherein the memory capacity of the mass storage is a multiple of the memory capacity of the core memory, that the core processor is adapted to import, verify and activate programs/data sets loaded into the mass storage for a program execution in a partitioned manner in the core memory, and that the core processor is adapted to authenticate partitioned programs/data sets not required for the program execution and stored in the core memory and to export them into the mass storage and/or to delete them in the core memory.

Claims17

Dependent claims

A safety module for electronic data processing, comprising:

a safety core comprising a core processor, and connected therewith, a core memory and a core interface, said core memory having a memory capacity;
the core processor being configured to import via the core interface, and to verify and with successful verification to store and to activate programs/data sets in the core memory;
that the safety core being connected by the core interface with a mass storage of the safety module arranged outside of the safety core, the mass storage having a memory capacity that is a multiple of the memory capacity of the core memory,
the core processor being confused to import, verify and activate programs/data sets loaded into the mass storage for a program execution in a partitioned manner in the core memory;
and
the core processor being configured to authenticate partitioned programs/data sets not required for the program execution and stored in the core memory and to export said partitioned programs/data sets into the mass storage and/or to delete said portioned programs/data sets, in the core memory.

3 more elements

A method for operating a safety module (1) according to one of claims comprising the steps of:

a) loading a program/data set into a mass storage;
b) electronically analyzing sections of the program/data for program code and data, of the data optionally for volatile data, persistent data, compressed data, non-initialized data, initialized data and safety-critical data;
c) partitioning the sections into pages, for each page a page-individual authentication code being formed using a key code stored in the key memory and assigned to the respective page, connected with the respective page and additionally stored separately in the core memory in a code table;
and
d) copying, if applicable after decompression and/or initialization, of the pages connected with the page-individual authentication code into free physical address sectors of the mass storage.

2 more elements

Dependencies are inferred from the claim text.

Safety module for a franking machine

Life of this patent

Safety module for a franking machine

Life of this patent

Abstract

Claims17