Patent ID: 7667595

Claim:
A security system, comprising: a security target; and a management system configured to manage the security target and to store predetermined sequence information, wherein the security target includes a sequence signal generator, the sequence signal generator includes: a plurality of activation switches, each activation switch generates activation signals, and a plurality of partial signal generating sections, each partial signal generating section generates unique partial signals constituting a sequence signal, upon receipt of the activation signals, each activation switch corresponds to any of the partial signal generating sections according to corresponding relationships, when an activation signal is generated from an activation switch, the partial signal generating section corresponding to the activation switch according to the corresponding relationships receives the activation signal and generates a unique partial signal, wherein the management system is configured to compare the sequence signal generated from the sequence signal generator with predetermined sequence information, which remains unchanged even when the corresponding relationships are changed, and to signal an alarm when the sequence signal generated and the predetermined sequence information do not match each other, and wherein corresponding relationships between activation signals generated from the activation switches and partial signals generated from the partial signal generating sections are freely changeable, in the security target, by a user of the security target without informing the management system and without changing the predetermined sequence information, such a change in the corresponding relationships between activation signals generated from the activation switches and partial signals generated from the partial signal generating sections made by the user is known only to the user, and only when the predetermined sequence information is changed, the management system is to inform the user of such change of the predetermined sequence information.