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Class 380/278 - Key distribution


Subclass of Class 380 - Cryptography
Definition: Subject matter wherein the manner of sending or
No. of patents: 685
Last issue date: 05/21/2013


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NumberTitleIssue Date
7206412Reception terminal, key management apparatus, and key updating method for public key cryptosystem
A method for use in a distribution system having a key management center, a distribution station and a reception terminal. The method updates a pair of distribution keys unique to the reception terminal, where the distribution public key is used to encrypt distribut...
04/17/2007
7203317System for enabling lazy-revocation through recursive key generation
A plurality of users may have access to a file. The file is encrypted with a key. Access for a user to the file is revoked. A new key is generated from the current key of the file in response to said revocation, and the file is encrypted with the new key. ...
04/10/2007
7203312Data reproduction apparatus and data reproduction module
A cellular phone has distributed encrypted content data and an encrypted content key stored in a memory. The encrypted content key data read out from the memory is decrypted by a decryption processing unit using key data Kp stored in a Kp hold unit, and then applied...
04/10/2007
7203316Signing and signature authentication of messages
Method for signing a message, in which a control center and the receiver share a permanent, main key. The control center produces a sequence number, and a signing key from this by means of a one-time function. Both are provided in secure form to the sender. The send...
04/10/2007
7203318Secure transmission system for a digital trunked radio system
A security system for a digital trunked radio system having a digital control channel and a plurality of working channels, wherein said working channels are assigned for temporary use of individual radio units by digital control signals transmitted over said control...
04/10/2007
7203837Methods and systems for unilateral authentication of messages
A system and method for authentication verifies the address of an information sender based on the sender's address, public key, and a digital signature. A portion of the sender's address is derived from the public key, such as by incorporating a portion of a hash of...
04/10/2007
7203319Apparatus and method for installing a decryption key
An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a p...
04/10/2007
7200682Time stamp generating system
A time stamp generating system has a time distribution server for generating time data depending on time and a user PC for holding time certification objective digital data. The time distribution server generates time data corresponding to a time point and distribut...
04/03/2007
7200234Fingerprint, control signal for new encryption key
For transmitting an information string from a source entity to a destination entity the information is encrypted through a time-sequence of encrypting keys that are each valid only in a predetermined associated time interval within the string. The destination entity...
04/03/2007
7200225Elliptic curve point ambiguity resolution apparatus and method
An apparatus for operating a cryptographic engine may include a key generation module for creating key pairs for encrypting substantive content to be shared between two users over a secured or unsecured communication link. The key generation module may include a poi...
04/03/2007
7200868Apparatus for encryption key management
An apparatus and a receiver, which is in a broadband communication system, includes the logic necessary for protecting keys used for encrypting content that is received by the receiver. The apparatus validates the keys and denies the receiver the use of the keys if ...
04/03/2007
7194619Remotely booting devices in a dense server environment without manually installing authentication parameters on the devices to be booted
A method, system and computer program product for remotely booting devices. A deployment server may remotely transmit authentication parameter(s), e.g., public key, secret key, to a service unit configured to establish a private connection between server blades and ...
03/20/2007
7187772Anonymous transactions based on distributed processing
An entity that desires to engage in anonymous transactions first generates a transaction identification that does not uniquely identify the entity. Additionally, the entity splits an entity identification uniquely associated with the entity into a plurality of secre...
03/06/2007
7184555Quantum computation
The invention includes systems for and methods of performing quantum computation. The method of quantum computation includes preparing a set of one or more qubits capable of storing quantum information in 2n possible states, wherein the number of qubits n...
02/27/2007
7184553Method and system for encryption of optical signals
A method, a system and a device for encrypting an optical signal to be transmitted via an optical fiber communication link by causing controlled chromatic dispersion of said signal. The controllable decryption device, as well as the controllable decryption device, c...
02/27/2007
7181014Processing method for key exchange among broadcast or multicast groups that provides a more efficient substitute for Diffie-Hellman key exchange
An approach for arriving at a shared secret key in a multicast or broadcast group environment is disclosed. The key exchange protocol permits nodes within a multicast or broadcast group to compute a shared secret key in a binary fashion, whereby a shared secret key ...
02/20/2007
7181762Apparatus for pre-authentication of users using one-time passwords
A computer program product for a client computing system including a processor includes code that directs the processor to request a challenge from a authentication server, code that directs the processor to receive the challenge from the authentication server via a...
02/20/2007
7181011Key bank systems and methods for QKD
Key banking methods and systems for quantum key distribution (QKD) are disclosed. A method of the invention includes establishing a primary key bank that stores perfectly secure keys associated with exchanging true quantum pulses between two QKD stations Bob and Ali...
02/20/2007
7177251Recording method, recording apparatus, reproduction method and reproduction apparatus for recording and reproducing data in which additional information is buried in contents data
The present invention aims to enable revision of additional information buried in contents data with less burden on hardware. For this purpose, a predetermined amount of inputted contents data is temporarily stored in buffer means, the additional information buried ...
02/13/2007
7178038Apparatus and method for reproducing user data
In an apparatus and a method for reproducing user data stored in encrypted form on a recording medium, in order to provide a higher level of protection against hacking of user data and, in particular, of decryption keys, which are used for encrypting said user data ...
02/13/2007
7178168Shift device and method for shifting
A shift device for shifting a first place of a data word, which consists of a plurality of places, to a second place so as to obtain a shifted data word, wherein the first place is encrypted using a first encryption parameter and wherein the second place is encrypte...
02/13/2007
7177285Time based wireless access provisioning
A method and apparatus is provided for the time-based provisioning of wireless devices. A network access point monitors operation of wireless devices within a service region. When provisioning logic is activated at the network access point, the access point determin...
02/13/2007
7174021Systems and methods for providing secure server key operations
A key management interface that allows for different key protection schemes to be plugged into a digital rights management system is disclosed. The interface exposes the functionality of signing data, decrypting data encrypted using a public key, and re-encrypting d...
02/06/2007
7174017Decryption system for encrypted audio
An encrypted audio decryption system for decrypting encrypted audio sound. The system includes a hearing device and a key FOB. The hearing device is adapted to receive the encrypted audio sound, decrypt the encrypted audio sound, and transmit signals corresponding t...
02/06/2007
7174332Method and apparatus for safeguarding files
A computer implemented method for safeguarding files, comprising the steps of designating a location on a first computer for storage of files to be safeguarded, selecting certain of the files to be safeguarded from the location based upon predetermined selection cri...
02/06/2007
7174456Fast authentication and access control method 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...
02/06/2007
7171001Method and apparatus for managing secure collaborative transactions
Different levels of security are provided in a security system so that users can decide the security level of their own communications. Users can choose a low level of security and maintain the security overhead as low as possible. Alternatively, they can choose hig...
01/30/2007
7171000Simplified addressing for private communications
A system for securely transmitting an information package (10) to an addressee via a network (108) includes a directory interface (110) adapted to check a directory (112) to determine whether the addressee has a public key; an escrow key ...
01/30/2007
7170999Method of and apparatus for encrypting and transferring files
A peer-to-peer connection is established by a receiving computer with a sending computer on which a desired file is located. The sending computer encrypts the file using a track key specifically generated for this particular file transfer. Once encrypted, the encryp...
01/30/2007
7171679Generating and maintaining encrypted passwords
A system, method and program of the invention provides an application program tool that generates a password for a user to access a resource. The tool receives as input from a user a global user password and at least one hash key. The tool applies a consistent algor...
01/30/2007
7167565Efficient techniques for sharing a secret
An n person secret sharing solution computes n unique keys to be distributed to the secret owners along with an exponentiated version of the secret. The custodian performs an exponent/modulo operation each time one of the keys is received from one of the secret owne...
01/23/2007
7167981Method of transmitting email, device for implementing same method, and storing medium storing program for transmitting email
A method of transmitting email and a device for transmitting email capable of broadcasting the email including encrypted data effectively. When a personal computer PC1 accepts an instruction to transmit same data to multiple destinations by email, the PC1
01/23/2007
7162452Key distribution via a memory device
A memory element is provided in the recording medium that is readable but not writeable by external devices, and whose content changes each time select material is recorded onto the medium. The content of this memory element forms a unique encryption key for encrypt...
01/09/2007
7162634Method for providing security on a powerline-modem network
A method for creating a secure powerline modem network transmits a private key (y) individually to each of the plurality of powerline modem devices (22) to be secured in a network such that each powerline modem device receives the private key in isolation of ...
01/09/2007
7159113Distribution information management system and method
Distributors can verify a signature without acquisition of a certificate for each signer from the certificate authority. A signature part calculates a hash value of distribution information and sets it to a variable h (step S412). Signer private information i...
01/02/2007
7155611Method of operating a conditional access system for broadcast applications
In a method for operating a conditional access system for broadcast applications, the conditional access system comprising a number of subscribers and each subscriber having a terminal including a conditional access module and a secure device for storing entitlement...
12/26/2006
7149310Method and system for authorizing generation of asymmetric crypto-keys
A method and system for generating asymmetric crypto-keys usable by network users to transform messages is provided. The system includes a first network station associated with a user, a second network station associated with a trusted entity, and a third network st...
12/12/2006
7149308Cryptographic communications using in situ generated cryptographic keys for conditional access
A system and method for cryptographic communication among multiple users and a central service provider using in situ generated cryptographic keys. Each user communicates with the central service provider preferably using a user communication interface that includes...
12/12/2006
7146009Secure electronic messaging system requiring key retrieval for deriving decryption keys
A secure electronic messaging system permits communication between registered users, with the assistance of a key server. The system requires a recipient to submit key retrieval information to a key server, and obtain decryption key information. The decryption key i...
12/05/2006
7145686Web-based imaging device service influenced by accessories
A web based imaging destination service requests web content from its paper handling accessories for a represented printing device and incorporates this content into the web content that it downloads into the client browser. In some embodiments, the printing device'...
12/05/2006
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