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| Number | Title | Issue Date |
| 8190886 | Revocation information transmission method, reception method, and device thereof The invention provides a revocation information transmission method, revocation information reception method, revocation information transmitting apparatus, and revocation information receiving apparatus, wherein all the video output apparatuses such as STB may have... | 05/29/2012 |
| 8181019 | Systems and methods for managing CRLS for a multi-core system The present invention is directed towards systems and methods for maintaining Certificate Revocation Lists (CRLs) for client access in a multi-core system. A first core may generate a secondary CRL corresponding to a master CRL maintained by the first core. The CRLs... | 05/15/2012 |
| 8181018 | Master key trust grants and revocations for minor keys A method and apparatus is provided that allows code signed by a master key to grant trust to an arbitrary second key, and also allows code, referred to as an antidote and also signed by the master key to revoke permanently the trust given to the second key. ... | 05/15/2012 |
| 8156327 | Revocation of cryptographic digital certificates A distributed certificate authority includes a CA and a number of Sub-CAs (2610). The Sub-CAs have secret certificate validation data, but different data are provided to different Sub-CAs for each certificate. If a Sub-CA is compromised, the Sub-CA validity p... | 04/10/2012 |
| 8135951 | Automated key management system and method A system and method for automatic key and certificate management is disclosed. In particular, a key store in a base computer contains both new and previously viewed cryptographic keys. In one embodiment, for each new key, if a corresponding certificate matches an ex... | 03/13/2012 |
| 8131996 | Distributed management of a certificate revocation list In a method for managing a Certificate Revocation List (CRL), a first device (31, 61) receives the CRL (33, 67) which comprises at least one revoked certificate identifier (SNi). An integrity field (MACi) associated to an entry of... | 03/06/2012 |
| 8112624 | Method and system for certificate revocation list compression Embodiments of the present invention provide a compression capability for compressing a CRL, such as an X.509 CRL, stored as a file, data structure or data object in a computer system having a certification authority (CA) and a security client. An exemplary method p... | 02/07/2012 |
| 8108670 | Client apparatus and method with key manager In some embodiments, an apparatus comprises a certificate store to store a current certificate associated with a key pair including a current public key and a current private key; a policy decision point (PDP) module to monitor the certificate store and to ascertain... | 01/31/2012 |
| 8095518 | Translating DRM system requirements Various embodiments provide a mapping layer to translate DRM system requirements from one DRM system, such as a source system, to another DRM system, such as a target system. In at least some embodiments, DRM system requirement translation is performed using a signe... | 01/10/2012 |
| 8065519 | Wireless communication system, terminal, method for reporting status of terminal, and program A wireless communication system includes a plurality of terminals connected to at least one wireless network on the basis of authority of security configuration parameters shared by the plurality of terminals. Each of the plurality of terminals revokes security conf... | 11/22/2011 |
| 8065518 | Fast authentication and access control system for mobile networking A fast authentication and access control method of authenticating a network access device to a communications network having an access point communicating with a remote authentication (home AAA) server for the network access device. The method includes the step of r... | 11/22/2011 |
| 8055896 | Tag generation method in broadcast encryption system A tag generation method for generating tags used in data packets in a broadcast encryption system is provided. The method includes detecting at least one revoked leaf node; setting a node identification (node ID) assigned to at least one node among nodes assigned no... | 11/08/2011 |
| 8041944 | Group signature system and information processing method In a group signature system of the present invention, user device 400 registered in the group, when receiving an issuing device public key of a set that includes order N of a cyclic group and its elements a—0, a—1 and a... | 10/18/2011 |
| 8041943 | Revocation list improvement A method for enforcing use of certificate revocation lists in validating certificates, the lists being associated with a series of list generation indices such that each list is assigned one index which advances according to a time of generation of the list, the lis... | 10/18/2011 |
| 8037300 | Information processing apparatus with certificate invalidity determination An information processing apparatus includes a verification unit for verifying validity of a certificate that certifies a communication party and a transmission unit for externally transmitting information for identifying the information processing apparatus and a r... | 10/11/2011 |
| 8024562 | Revocation of cryptographic digital certificates In the setup phase, the certification authority (CA 120) generates validation proof data structures for greater time than the maximum validity period of any digital certificate. Therefore, new certificates can be added to the existing data structures after th... | 09/20/2011 |
| 8015401 | Authentication of data transmitted in a digital transmission system A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a ke... | 09/06/2011 |
| 8006085 | License management system and method A license-management system and method is provided. A method of issuing a proxy certificate includes transmitting a proxy-certificate-issuance-request message to a license server in order for the local license manager to acquire an authority to issue a license by a ... | 08/23/2011 |
| 8006086 | Revocation of cryptographic digital certificates A computer system (110) provides validity status proofs each of which proves the validity or invalidity of a set (F) of one or more digital certificates (104). The computer system may decide to cache a validity proof for a set F to later provide the ca... | 08/23/2011 |
| 7958350 | Proactive forced renewal of content protection implementations A system for proactive forced renewal of content protection implementations in devices includes a key generation facility to generate and allocate keys for the devices, and to generate revocation data corresponding to revoked keys in response to at least one of a se... | 06/07/2011 |
| 7958349 | Method for revoking a digital signature A method and apparatus for revoking a digital signature using a signature revocation list. In one embodiment, the method includes generating the signature revocation list to indicate revocation status of a signature. The signature is created from an encryption key a... | 06/07/2011 |
| 7882348 | System and method for administering digital certificate checking Systems and methods for handling electronic messages. An electronic message that is associated with a digital certificate is to be processed. A decision whether to check the validity of the digital certificate is based upon digital certificate checking criterion. An... | 02/01/2011 |
| 7870383 | System, method and program to update certificates in a computer System, method and program product for updating a current encryption certificate with a new encryption certificate in a computer having a first plurality of communication channels which require an encryption certificate and a second plurality of communication channe... | 01/11/2011 |
| 7865721 | Method and system for configuring highly available online certificate status protocol A method and system is presented for configuring a group of OCSP (Online Certificate Status Protocol) responders so that they are highly available. Each of the grouped OCSP responders share a common public key. When responding to an OCSP request, an OCSP responder g... | 01/04/2011 |
| 7853785 | System and method for implementing digital certificate revocation in an ad-hoc network A computer-implemented system for implementing maintenance and distribution of revocation information within an ad-hoc network. The system includes at least one network node. The network node includes a computer implemented application configured to maintain revocat... | 12/14/2010 |
| 7827401 | Efficient certificate revocation We propose new systems for certificate revocation that are more economical and efficient than traditional ones. We also point out what we believe to be a structural problem in traditional public-key infrastructures, and various ways to solve it. ... | 11/02/2010 |
| 7822976 | Network data security system and protecting method thereof The invention presents a network data security system and a protecting method applied in network data transmission. Meanwhile the network data security system includes a client, an authentication dispatching server and a number of distributed servers. The authentica... | 10/26/2010 |
| 7814315 | Propagation of certificate revocation information A method and apparatus for propagating certificate revocation information. A certificate revocation list is received that includes a plurality of entries. The plurality of entries are grouped other than by order of appearance in the certificate revocation list. Cert... | 10/12/2010 |
| 7814314 | Revocation of cryptographic digital certificates Different targets (c0, N1) of a digital certificate are mapped into a “super-target” using methods allowing a certificate validity verifier (110) to compute the super-target. The certificate includes the super-target instead of the t... | 10/12/2010 |
| 7809941 | Certifier hierarchy for public key infrastructure in an ad-hoc network A computer-implemented method for generating a hierarchical set of certifiers nodes for a public key infrastructure within an ad-hoc network. The method includes determining at least one potential certifier node that is eligible to become certifier nodes from a set ... | 10/05/2010 |
| 7801869 | Partial revocation list A partial revocation list and a system and method for using the partial revocation list for tracking the authenticity of replacement cartridges in a manufactured device to inhibit cloning of the cartridges is provided. A revocation pool is maintained by a manufactur... | 09/21/2010 |
| 7788486 | System and method for distributing and creating presentations A slide customization system, comprising an administrator, wherein at least one information presentation is received at the administrator, at least one database, wherein the at least one information presentation is stored, a validator, wherein validation of the at l... | 08/31/2010 |
| 7761704 | Method and apparatus for expiring encrypted data One embodiment of the present invention provides a system that can expire encrypted-data. During operation, the system receives an expiry-request that includes object-identifying information, which can be used to identify a set of database objects that contain the e... | 07/20/2010 |
| 7757079 | System and method for supporting multiple certificate authorities on a mobile communication device A system and method for supporting operations with multiple certification authorities (CAs) on a communication device. A common CA interface is provided between a plurality of secure communication applications and a plurality of CA-specific components, each of which... | 07/13/2010 |
| 7743248 | System and method for a remote access service enabling trust and interoperability when retrieving certificate status from multiple certification authority reporting components A Certificate Status Service that is configurable, directed, and able to retrieve status from any approved Certification Authority (CA) is disclosed. The CSS may be used by a Trusted Custodial Utility (TCU) and comparable systems or applications whose roles are vali... | 06/22/2010 |
| 7739495 | Data transmitting system and method, drive unit, access method, data recording medium, recording medium producing apparatus and method A security module is provided in a data recording medium, data to be written to the data recording medium is encrypted with an content key different from one data to another, and the content key is safely stored in the security module. Also, the security module make... | 06/15/2010 |
| 7725711 | System and method of accessing keys for secure messaging Methods and systems for handling on an electronic device a secure message to be sent to a recipient. Data is accessed about a security key associated with the recipient. The received data is used to perform a validity check related to sending a secure message to the... | 05/25/2010 |
| 7702903 | License re-allocation system and method A present invention license reallocation system and method facilitates flexible and effective licensing distribution. The license reallocation system and method enables convenient movement of licensed information between hardware devices while ensuring appropriate c... | 04/20/2010 |
| 7657739 | Authentication system A device that ensures that one device acquires and updates a list used for judging whether the other device in communication is valid or invalid, in a device authentication system. When a list H stored in a personal computer 200 is old, the personal computer ... | 02/02/2010 |
| 7653810 | Method to automate the renewal of digital certificates The disclosure relates to the management of PKI digital certificates, including certificate discovery, installation, verification and replacement for endpoints over an insecure network. A database of certificates may be maintained through discovery, replacement and ... | 01/26/2010 |
