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Class 380/286 - Key escrow or recovery


Subclass of Class 380 - Cryptography
Definition: Subject matter wherein the key is deposited or retrieved
No. of patents: 382
Last issue date: 05/29/2012


1                    
NumberTitleIssue Date
8189794System and method for effectively performing data restore/migration procedures
A system and method for effectively supporting data transfer procedures includes a source device that registers with an account server to participate in a data backup service. The source device then encrypts and stores user data onto a datacenter. The source device ...
05/29/2012
8170216Techniques for validating and sharing secrets
Techniques for validating and sharing secrets are presented. A secret is divided into a plurality of parts. Each part is represented by a unique value. Each value is distributed to a unique user that shares in the secret. The secret is recreated when each user prese...
05/01/2012
8155322Systems and methods for distributing and securing data
A robust computational secret sharing scheme that provides for the efficient distribution and subsequent recovery of a private data is disclosed. A cryptographic key may be randomly generated and then shared using a secret sharing algorithm to generate a collection ...
04/10/2012
8139770Cryptographic key backup and escrow system
A system for securely storing application keys is comprised of a database system, a peripheral hardware security module and cryptographic keys, wherein cryptographic keys comprise application keys, intermediate keys and a master key. Application keys are grouped acc...
03/20/2012
8135135Secure data protection during disasters
In situations, such as disasters, where the physical protection of data may be compromised, algorithmic protection of such data can be increased in anticipation of the disaster. An off-site mechanism can send a disaster preparation script to computing devices expect...
03/13/2012
8130965Retrieval and transfer of encrypted hard drive content from DVR set-top boxes to a content transcription device
A system and method for the retrieval and transfer of encrypted content from a failed set-top box by a content transcription device. When content is recorded to the storage device of a set-top box, the content is encrypted with a content instance key. This content i...
03/06/2012
8098829Methods and systems for secure key delivery
An embodiment pertains generally to a method of delivering keys in a server. The method includes generating a subject key pair, where the subject key pair includes a subject public key and a subject private key. The method also includes retrieving a storage key and ...
01/17/2012
8085938Secret information management scheme based on secret sharing scheme
In a secret information management system for managing a secret information of a user, the secret information is divided into a plurality of divided data by using a secret sharing scheme, such that the secret information can be recovered from a prescribed number of ...
12/27/2011
8059821Method and system for disaster recovery in network systems
A method and apparatus for managing and backing-up a set of security keys are disclosed. The keys are generated first at a backup site and then are transmitted from the backup site to the primary site. The primary site then uses these keys to generate message authen...
11/15/2011
8054978Key management for content protection
A method for content access control operative to enable authorized devices to access protected content and to prevent unauthorized devices from accessing protected content, the method comprising: providing a plurality of authorized devices; dividing the plurality of...
11/08/2011
8014530Method and apparatus for authenticated, recoverable key distribution with no database secrets
A method and apparatus for authenticated recoverable key distribution are described. In one embodiment, an application key is provided to an integrated chip platform. In one embodiment, the integrated chip platform encrypts the application key with a Key Encryption ...
09/06/2011
7949138Secure instant messaging
Secure instant messaging is described. In an embodiment, a messaging device encrypts a challenge identifier to generate an encrypted challenge message, and communicates the encrypted challenge message via a peer-to-peer communication link to a recipient messaging de...
05/24/2011
7929707Use of graphics processors as parallel math co-processors for password recovery
In a computer system having a central processing unit (CPU) and a graphics processing unit (GPU), a system, method and computer program product for recovering a password used to encrypt a plaintext, including (a) generating N passwords on the CPU; (b) providing the ...
04/19/2011
7929706Encryption key restoring method, information processing apparatus, and encryption key restoring program
A disclosed encryption key restoring method enables restoration of an encryption key in the event of inability to use the encryption key stored in a secure memory of an information processing apparatus, in which data encrypted by the encryption key is stored in an i...
04/19/2011
7916871Technique for split knowledge backup and recovery of a cryptographic key
In a secure cryptographic environment, a private key in a private/public key cryptographic scheme needs to be backed up and recovered in case of a loss or corruption of the private key. To back up the private key, multiple key segments are generated based on the pri...
03/29/2011
7899190Security countermeasures for power analysis attacks
A countermeasure for differential power analysis attacks on computing devices. The countermeasure includes the definition of a set of split mask values. The split mask values are applied to a key value used in conjunction with a masked table defined with reference t...
03/01/2011
7873170Maintaining keys removed from a keystore in an inactive key repository
Provided are a method, system, and article of manufacture for maintaining keys removed from a keystore in an inactive key repository. A keystore includes active keys, wherein at least one active key in the keystore is associated with at least one storage device and ...
01/18/2011
7796763Method and system for disaster recovery of data from a storage device
Aspects of the invention provide a method and system for securely managing the storage and retrieval of data. Securely managing the storage and retrieval of data may include receiving a first disaster recovery code and acquiring a first password corresponding to the...
09/14/2010
7787629Use of graphics processors as parallel math co-processors for password recovery
In a computer system having a central processing unit (CPU) and a graphics processing unit (GPU), a system, method and computer program product for recovering a password used to encrypt a plaintext, including (a) generating N passwords on the CPU; (b) providing the ...
08/31/2010
7783046Probabilistic cryptographic key identification with deterministic result
An algorithm for recovering a key used to produce a cyphertext-plaintext pair includes (a) loading at least a portion of a probabilistic key table into memory; (b) distributing the keys in the portion of the probabilistic key table into a first plurality of buffer f...
08/24/2010
7711122Method and apparatus for cryptographic key storage wherein key servers are authenticated by possession and secure distribution of stored keys
A key management system includes secured data stored on a first system secured by a control key stored securely on a key server. The secured data is secured against attacks such as unauthorized use, modification or access, where authorization to access the secured d...
05/04/2010
7660423Method and apparatus for maintaining ephemeral keys in limited space
One embodiment of the present invention provides a system that maintains keys using limited storage space on a computing device, such as a smart card. During operation, the system receives a request at the computing device to perform an operation involving a key. Wh...
02/09/2010
7660422Encryption key updating for multiple site automated login
A version number is associated with an encrypted key executable to allow real time updating of keys for a system which facilitates users signing on to multiple websites on different domains using an encrypted ticket. Two keys may be used at each site during updating...
02/09/2010
7653202Method and system for securing data utilizing redundant secure key storage
A system and method which protects a data processing system against encryption key errors by providing redundant encryption keys stored in different locations, and providing the software with the ability to select an alternate redundant key if there is any possibili...
01/26/2010
7630499Retrieval and transfer of encrypted hard drive content from DVR set-top boxes
A system and method for retrieval and transfer of encrypted content from a failed set-top box. When content is recorded to the storage device of a set-top box, the content is encrypted with a content instance key. This content instance key is encrypted with the publ...
12/08/2009
7616766Data division method and device using exclusive or calculation
A plurality of original partial data are generated by dividing the original data by the prescribed processing unit bit length, a plurality of random number partial data each having a length less than or equal to the prescribed processing unit bit length are generate...
11/10/2009
7564977System, method and program product for anonymous transfer of messages
A final agent of the message provides a first encryption key to a first agent, interposed between a message sender and the final agent. The first agent but not the final agent knows an identity of the sender. The final agent provides a second encryption key to a sec...
07/21/2009
7522732Method for controlling the distribution of software code updates
A method is described for controlling the distribution of a software code update for an embedded software application on a device. The method includes the steps of assigning an asymmetric key pair to the software application and another asymmetric key pair to the se...
04/21/2009
7444512Establishing trust without revealing identity
A method, system, and apparatus are provided for establishing trust without revealing identity. According to one embodiment, values in a first proof corresponding to a first statement are precomputed, a request for a second proof is received from a challenger, and t...
10/28/2008
7441115Method for verifying a digital signature
The invention provides a method for verification having a structure that reflects reliability of a signature history properly for a hysteresis signature used for verification based on the signature history, and provides a method for arbitration and an arbitrator app...
10/21/2008
7418474Secure identification system
Methods and apparatus are described which provide secure interactive communication of text and image information between a central server computer and one or more client computers located at remote sites for the purpose of storing and retrieving files describing and...
08/26/2008
7418736Network security system
Security is provided in a network system. A message is received from a user, which message requires authentication of the user. An authentication message is sent indicating the identity of the user to an initial software security agent. The software security agent, ...
08/26/2008
7415115Method and system for disaster recovery of data from a storage device
Aspects of the invention provide a method and system for securely managing the storage and retrieval of data. Securely managing the storage and retrieval of data may include receiving a first disaster recovery code and acquiring a first password corresponding to the...
08/19/2008
7397917Method and apparatus for generating a cryptographic key
A method and apparatus are provided for generating a cryptographic key from multiple data sets each related to a respective association of a trusted party and user identity. The cryptographic key is, for example, one of an encryption key, a decryption key, a signatu...
07/08/2008
7382884Key management for content protection
A method for content access control operative to enable authorized devices to access protected content and to prevent unauthorized devices from accessing protected content, the method comprising: providing a plurality of authorized devices; dividing the plurality of...
06/03/2008
7379546Method for XZ-elliptic curve cryptography
Given a set of elliptic curve points defined over a field F(p) and represented in projective coordinate, a method is presented which allows the embedding of data bits in both the X-coordinate and the Z-coordinate of the elliptic curve point when represented in proje...
05/27/2008
7379551Method and system for recovering password protected private data via a communication network without exposing the private data
Securely roaming private data from one client computer to another in a network. A home client application generates a first key in response to a password, and encrypts designated private data as a function of the first key. A server receives and stores the encrypted...
05/27/2008
7373672Method for securely managing information in database
A method for storing and securely managing important information for a user in a database includes storing synchronizing information, which changes when a portion of the important information is updated, in the database together with the important information, and e...
05/13/2008
7370200Validation for secure device associations
The present invention provides for validating an association between computing devices using a succession of human-perceptible stimuli such as sounds, lights colors or shapes. Commands are sent from the initiating device to the responding device in encrypted message...
05/06/2008
7370070Data sharing method, request processing method, program, and apparatus
A data sharing apparatus shares first data with a communication partner. The data sharing apparatus obtains second data from third data by using server-aided computation, and generates fourth data to be used by the communication partner for obtaining the first data,...
05/06/2008
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