PHYSICAL ACCESS CONTROL
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0 Petitions
Accused Products
Abstract
A system and method are disclosed for controlling physical access through a digital certificate validation process that works with standard certificate formats and that enables a certifying authority (CA) to prove the validity status of each certificate C at any time interval (e.g., every day, hour, or minute) starting with C'"'"'s issue date, D1. C'"'"'s time granularity may be specified within the certificate itself, unless it is the same for all certificates. For example, all certificates may have a one-day granularity with each certificate expires 365 days after issuance. Given certain initial inputs provided by the CA, a one-way hash function is utilized to compute values of a specified byte size that are included on the digital certificate and to compute other values that are kept secret and used in the validation process.
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Citations
41 Claims
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1-21. -21. (canceled)
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22. A method for controlling access to at least one disconnected door, comprising:
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for each time interval of a sequence of dates, causing an entity to produce a digital signature, wherein the digital signature indicates that at least one user can access the disconnected door during the time interval; causing a card of a first user to receive the digital signature during the time interval for presentation to the disconnected door in order to pass through the disconnected door; after the first user presents the card with the digital signature to the disconnected door, causing the disconnected door to open after verifying that;
(i) the digital signature is a digital signature of the entity indicating that the first user can access the disconnected door at the time interval, and (ii) that a current time is within the time interval; andproviding access information about an access attempt at the disconnected door to a database that is disconnected from the door. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. Computer software, provided in a non-transitory computer-readable medium, that controls access to at least one disconnected door, the software comprising:
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executable code that, for each time interval of a sequence of dates, causes an entity to produce a digital signature, wherein the digital signature indicates that at least one user can access the disconnected door during the time interval; executable code that causes a card of a first user to receive the digital signature during the time interval for presentation to the disconnected door in order to pass through the disconnected door; executable code that causes the disconnected door to open after the first user presents the card with the digital signature to the disconnected door and after verifying that;
(i) the digital signature is a digital signature of the entity indicating that the first user can access the disconnected door at the time interval, and (ii) that a current time is within the time interval; andexecutable code that provides access information about an access attempt at the disconnected door to a database that is disconnected from the door. - View Dependent Claims (38, 39, 40, 41)
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Specification