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Electrical Computers And Digital Processing Systems: Support > Multiple Computer Communication Using Cryptography > Central Trusted Authority Provides Computer Authentication > By Certificate > Revocation Or Expiration Revocation Or ExpirationRevocation Or Expiration patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.08/23/07 - 20070198832 - Methods and apparatus to certify digital signatures Methods and apparatus to certify digital signatures are disclosed. An example method includes receiving a request to certify a digital signature from a user, receiving information about a physical characteristic of the user, comparing the information about the physical characteristic to stored physical characteristic information, and based on the comparison, ... 08/09/07 - 20070186098 - 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 channels which do not require an encryption certificate. The computer stores the current ... 08/02/07 - 20070180231 - Preventing entitlement management message (emm) filter attacks A system, apparatus, and method are directed towards preventing entitlement/rights filter attacks in a conditional access to secure content over a network. An EMM that is configured to revoke access to selected content may be sent to a user, when a content provider, or the like, determines that access to ... 07/19/07 - 20070168660 - 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 interacts with a particular CA. A further common interface may also be ... 07/19/07 - 20070168659 - Generation of set coverings with free riders, and generation of ordered sets of meeting points, in systems which include, but are not limited to, systems for broadcast encryption and systems for certificate revocation In a broadcast encryption scheme, an optimal or near-optimal set covering CV(f,P) is computed for a set P of privileged users and at most a predefined number f of revoked users (“free riders”). The covering consists of elements of a predefined set cover CC(U) for the set of all users ... 06/28/07 - 20070150727 - Management apparatus There is provided a management apparatus, which comprises a transmission condition judgment unit which refers to a target digital certificate and judges whether a predetermined transmission condition is satisfied based on a period of validity written in the target digital certificate, a mail generating unit which generates an e-mail provided ... 05/31/07 - 20070124581 - Cell adhesion and extracellular matrix proteins Various embodiments of the invention provide human cell adhesion and extracellular matrix proteins (CADECM) and polynucleotides which identify and encode CADECM. Embodiments of the invention also provide expression vectors, host cells, antibodies, agonists, and antagonists. Other embodiments provide methods for diagnosing, treating, or preventing disorders associated with aberrant expression of ... 05/24/07 - 20070118740 - Authentication method and information processor In a network made up of a plurality of terminals, each of the terminals in the network includes a digital certificate revocation list. When the digital certificate revocation list of its own is updated, the terminal sends information including the updated details to other terminal so that a digital certificate ... 05/24/07 - 20070118739 - Certificate issuance server and certification system for certifying operating environment It is an object to provide a certification system designed for security patrol, for example, that certifies a patrolled time and a patrolled site in security patrol rounds. It is another object to certify the time when an image was taken and the site where the image was taken, for ... 05/17/07 - 20070113075 - Secure route optimization for mobile network using multi-key crytographically generated addresses A method allows a mobile router that uses the Mobile Internet Protocol version 6 (Mobile IPv6) for mobility management to optimize routing by securely sending binding update messages directly to correspondent nodes on behalf of each mobile network node, even if the node does not perform Mobile IPv6 functions. Since ... 05/17/07 - 20070113074 - Service for determining whether digital certificate has been revoked A revocation determination service determines for a client whether a particular digital certificate as issued by a particular certificate authority (CA) has been revoked by such CA. In the service, an engine receives a query from the client, where the query identifies the particular certificate and the CA that issued ... 12/14/06 - 20060282664 - Crl last changed extension or attribute A method and apparatus for generating a CRL with a last_changed extension. When sequential CRLs are generated there is the potential that there will be no changes in the data associated with the CRL. In this case a recipient of the new CRL may needlessly perform processing on the new ... 12/14/06 - 20060282663 - Name transformation for a public key infrastructure (pki) Under the present invention, when a request for a certificate is made, a set of (mapping) rules are used to identify an appropriate directory and any other information sources, and to retrieve information for the certificate therefrom. The directory name is then transformed using the set of rules for use ... 11/09/06 - 20060253704 - Multi-key cryptographically generated address A method for generating a network address, called a multi-key cryptographically generated address (MCGA), enables the network address to be claimed and defended by multiple network devices. The network address can be generated by (a) obtaining a cryptographically generated identifier using public keys corresponding to the network devices, and (b) ... 10/19/06 - 20060236099 - 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 node IDs at a layer 0 and ... 10/19/06 - 20060236098 - Multisigning - a protocol for robust multiple party digital signatures Embodiments describe a system and/or method for multiple party digital signatures. According to a first aspect a method comprises establishing a first validity range for a first key, establishing a first validity range for at least a second key, and determining if the validity range of the first key overlaps ... 10/12/06 - 20060230265 - Cookie-based acceleration of an authentication protocol A system uses a proxy server to authenticate a client with an authentication protocol that does not support caching. Rather than cache the client's authentication credentials, or access a client account manager for each network request generated by the client, the proxy server issues a cookie to an authenticated client ... 08/10/06 - 20060179299 - E-mail communication device The present invention provides a highly reliable e-mail communication device capable of monitoring validity of a certificate of the e-mail communication device itself. The e-mail communication device includes a certificate storage unit which stores a certificate of the e-mail communication device itself, a signature unit which adds a digital signature ... 07/27/06 - 20060168444 - Generic pki framework The present invention is a generic public key infrastructure (PKI) framework. A generic PKI framework can include a PKI adapter coupled to a plurality of different PKI certificate authorities (CAs). The PKI adapter can include program code enabled to select a particular one of the different PKI CAs based upon ... 06/29/06 - 20060143443 - Method and apparatus for deleting data upon expiration A method and apparatus for efficiently deleting data including backup or snapshots upon expiration are disclosed. The data can be deleted even without physical access to the data. A data generation unit generates a data. Each data has an expiration time and should be deleted upon expiration. An encryption unit ... 06/15/06 - 20060129805 - Method of managing user key for broadcast encryption A user key management method for a broadcast encryption includes assigning node path identifiers (IDs) to nodes arranged in sequence; assigning random seed value keys to the nodes according to the node path IDs; generating key values by repeatedly applying a hash function to the assigned random seed value keys; ... 05/18/06 - 20060107042 - Estimation of time within untrusted time device disconnected from trusted time device Upon connecting to a trusted device, an untrusted device: (a) acquires a trusted current time; (b) stores an elapsed time; (c) determines an estimated current time; and, (d) stores a time difference between the estimated current time and an untrusted current time. The untrusted device (e) repeats (b)-(d) until turned ... 03/02/06 - 20060047951 - Continuing public key infrastructure operation while regenerating a new certification authority keypair and certificate In accordance with one embodiment, continued PKI operation during regenerating a new Certification Authority (CA) keypair and certificate or the like is provided by a root Certification Authority preparing a second CA certificate responsive to a request from a subordinate certification authority. The root Certification Authority and the subordinate certification ... 11/17/05 - 20050257046 - 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 the CRL (371, . . . , 37p) is calculated using a ... 10/13/05 - 20050228988 - 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 security compromise and on a periodic basis independent ... 09/22/05 - 20050210241 - Method and apparatus for digital rights management using certificate revocation list A digital rights management method includes a stage for a device to update a Certificate Revocation List of the device through a connection to a portable storage, a stage to access to the updated Certificate Revocation List so as to judge the effectiveness of a certificate of the portable storage, ... 09/15/05 - 20050204129 - Multi-step digital signature method and system A multi-step signing system and method uses multiple signing devices to affix a single signature which can be verified using a single public verification key. Each signing device posesses a share of the signature key and affixes a partial signature in response to authorization from a plurality of authorizing agents. ... 09/08/05 - 20050198497 - Apparatus and method for demonstrating and confirming the status of digital certificates and other data Methods and apparatuses for providing cryptographic assurance based on ranges as to whether a particular data item is on a list. According to one computer-implemented method, the items on the list are sorted and ranges are derived from adjacent pairs of data items on the list. Next, cryptographically manipulated data ... 08/18/05 - 20050182925 - Multi-mode token A multi-mode cryptographic token that has at least one mode that allows for a certain period of time or number of operations to pass before requiring a user to logon. A predefined cryptographic operation is performed in each mode. Each mode has a predetermined expiration period or number of operations ... 07/14/05 - 20050154880 - Revocation information updating method, revocation information updating apparatus and storage medium At least one set of revocation information for identifying electronic appliances that should be revoked for content protection and master revocation information for identifying electronic appliances that have special permission to update the revocation information are recorded in advance into a special storage region on a storage medium. When the ... 06/23/05 - 20050138365 - Mobile device and method for providing certificate based cryptography A mobile device and method for providing certificate based cryptography includes a receiver (102) operative to receive a wireless transmission (110). Included within the wireless transmission is a certificate revocation notification (112). The mobile device and method thereof further includes an authenticator (104) operative to receive the certificate revocation notification ... 06/02/05 - 20050120207 - Method and system for enabling pki in a bandwidth restricted environment A PKI mechanism is facilitated in a bandwidth-limited distributed environment by creating a periodic chain of PKI related updates. Changes in CRLs are reflected by periodically created DeltaCRL objects that are part of a continuous chain. The DeltaCRL objects allow for the iterative generation of an updated CRL from a ... 06/02/05 - 20050120206 - Method and system for rule-based certificate validation A rule-based cryptographic services module is provided by way of a CAPI interface so as to provide security services over a plurality of protocols. The rule-based module applies logical rules to processing results provides from the plurality of protocols to identify an appropriate processing method for each request for security ... ### FreshPatents.com Support |