Upgradable security module
First Claim
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1. A security module comprising:
- a first communication port connectable to a host device;
a first storage device;
a first decryption means;
a hardware or software state module, which is configured to detect activity on a communication port and to determine, according to the activity, a state of said state module;
a second communication port; and
an insulating circuit placed in series with the second communications port and configured to electronically isolate said second communication port, said insulating circuit being controlled by the state module;
wherein the insulating circuit includes tri-state or bidirectional MOSFET elements; and
where at least a portion of a physical connection path including the first communication port is different from at least a portion of a connection path including the second communication port;
wherein the security module is configured to receive a security message via the first or second communication port, and modify a state of said state module defining an accessibility of the security module to the host device via the second communication port in response to the security message.
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Abstract
The aim of the present invention is to provide a security module capable of supporting the different functions of the latest and the previous generations, by avoiding any possible attack due to this adaptability. This aim is attained by a security module comprising first communication means to a host device, first storage means and first decryption means, characterized in that it includes a state module and second communication means and physical activation or deactivation means of said second means, such activation or deactivation being managed by the state module.
43 Citations
12 Claims
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1. A security module comprising:
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a first communication port connectable to a host device; a first storage device; a first decryption means; a hardware or software state module, which is configured to detect activity on a communication port and to determine, according to the activity, a state of said state module; a second communication port; and an insulating circuit placed in series with the second communications port and configured to electronically isolate said second communication port, said insulating circuit being controlled by the state module; wherein the insulating circuit includes tri-state or bidirectional MOSFET elements; and where at least a portion of a physical connection path including the first communication port is different from at least a portion of a connection path including the second communication port; wherein the security module is configured to receive a security message via the first or second communication port, and modify a state of said state module defining an accessibility of the security module to the host device via the second communication port in response to the security message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification