| 7043025 |
Method and apparatus for secured electronic commerce |
| May-9-2006 |
A user anonymously acquires a first sequence of encryption key material. An encryption server, having a second sequence complementary to the first sequence, receives and forwards encrypted messages and... |
| 7024561 |
Contents recording apparatus, recording medium, contents reproducing apparatus, contents transmission method, transmission medium, and contents reception method |
| Apr-4-2006 |
A recording apparatus generates key information based at least on contents reproduction permission information, encrypts contents based on the key information, and records the encrypted contents and recording... |
| 7020773 |
Strong mutual authentication of devices |
| Mar-28-2006 |
The present invention relates to a method for enabling strong mutual authentication between two computers in a communication system. A user from a client attempts to gain access to a server. The server... |
| 6993134 |
Key exchange via a portable remote control device |
| Jan-31-2006 |
The communications means that are commonly provided for the remote control of electronic components are utilized to effect an exchange of parameters to facilitate a cryptographic key exchange. The bidirectional... |
| 6990198 |
Apparatus and method for securing communication information in CDMA communication system |
| Jan-24-2006 |
An apparatus and a method for securing a communication information in a CDMA communication system are disclosed. The method of the invention comprises the steps of encoding a input analog signal as an... |
| 6988204 |
System and method for key distribution and network connectivity |
| Jan-17-2006 |
Systems and methods for distributing keys of the sort used for purposes including logging onto computer networks, accessing authorized domains, and accessing persistently-protected data. Also discussed... |
| 6986046 |
Method and apparatus for managing secure collaborative transactions |
| Jan-10-2006 |
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... |
| 6975726 |
Data transmission system |
| Dec-13-2005 |
A cipher key is generated by first information shared in secrete between a data transmitting unit 10 and a data receiving unit 20, second information derived from duplication control information... |
| 6957329 |
System for encrypting data from multiple multimedia applications and method thereof |
| Oct-18-2005 |
Methods and systems are provided for encrypting data from a plurality of multimedia devices. A driver initiates authentication for the plurality of multimedia applications. The driver assigns a key registers... |
| 6944300 |
Method for migrating a base chip key from one computer system to another |
| Sep-13-2005 |
A method for migrating a base chip key from a first computer system to a second computer system is disclosed. A first computer system includes a base chip key 1, and a second computer system includes... |
| 6941457 |
Establishing a new shared secret key over a broadcast channel for a multicast group based on an old shared secret key |
| Sep-6-2005 |
An optimized approach for arriving at a shared secret key in a dynamically changing multicast or broadcast group environment is disclosed. In one aspect of the invention, a method is provided for communicating... |
| 6931128 |
Methods and systems for generating encryption keys using random bit generators |
| Aug-16-2005 |
A security key, such as an encryption key, is generated so as to make it more difficult for eavesdroppers to identify the key. Specifically, a cryptographically secure random number generator generates... |
| 6928551 |
Method and apparatus for selectively denying access to encoded data |
| Aug-9-2005 |
A method and system is provided for selectively denying access to encoded data. Encryption is used to protect secured data on any of a number of media devices in a system and in which unsecured data is... |
| 6922774 |
Device for and method of secure computing using virtual machines |
| Jul-26-2005 |
A device for and method of secure computing that includes a computer system having a processor; an operating-system software program loaded onto the processor; a type-II virtual machine monitor software... |
| 6912657 |
Method and arrangement in a communication network |
| Jun-28-2005 |
The present invention relates to the problem of establishing of security that arises within an ad hoc network The problem is solved by using an optical device at a first device to read a public key that... |
| 6912654 |
Secret key generating method, encryption method, cryptographic communication method and cryptographic communication system |
| Jun-28-2005 |
A secret key of an entity is generated at each key generating agency (center) by using divided identification information obtained by dividing identification information of the entity into a plurality... |
| 6912285 |
Mechanism for efficient private bulk messaging |
| Jun-28-2005 |
Secure bulk messaging mechanism in which, roughly described, a sender first encrypts a message once. The message can be decrypted with a message decryption key. These can be symmetric or asymmetric keys.... |
| 6907127 |
Hierarchical key management encoding and decoding |
| Jun-14-2005 |
The present invention discloses a construction for key management module functionality which provides for secure encoding and decoding of messages which are up to two blocks long. A method for generating... |
| 6882730 |
Method for secure distribution and configuration of asymmetric keying material into semiconductor devices |
| Apr-19-2005 |
In one embodiment, a method is described to secure transfer data from one location to another for storage in an electronic component. The transfer occurs with part of the data routed to a first destination... |
| 6854059 |
Method and apparatus for medium access control in powerline communication network systems |
| Feb-8-2005 |
An inventive Medium Access Control (MAC) protocol for powerline networking systems is described. The inventive MAC protocol controls access to and use of a physical medium (power lines) in a powerline... |
| 6850620 |
Method for preventing key share attacks |
| Feb-1-2005 |
A key agreement protocol for preventing key-share attacks wherein a method is provided for establishing a common shared key between a pair of correspondents in a station-to-station protocol by exchanging... |
| 6848050 |
System and method for alternative encryption techniques |
| Jan-25-2005 |
A system and method for verifying the identification of a user and securely establishing an encryption key for a communication between the user and a verifying entity, such as a bank, which makes use of... |
| 6826699 |
Method and apparatus for performing authentication and key exchange protocols with multiple sink devices |
| Nov-30-2004 |
A method and system for a source device to simultaneously perform authentication and key exchange (hereinafter referred to as "AKE") protocols with multiple sink devices. In a communication network that... |
| 6813357 |
Exclusive key sharing method |
| Nov-2-2004 |
In a set-up phase, the base station formulates the secret key S and holds it in secret. The secret information Si which are obtained by dividing the secret key S are distributed in secret to respective... |
| 6810122 |
Secret sharing system and storage medium |
| Oct-26-2004 |
A secret sharing system and a storage medium where each of the n shareholders P1 to Pn holds a (n, n) share di (0.ltoreq.i.ltoreq.n), turns the share di into t(r+1) partial random numbers Sj of the (t,... |
| 6772339 |
Mix and match: a new approach to secure multiparty computation |
| Aug-3-2004 |
A method for secure multiparty computation is disclosed. In one embodiment, participants to a secure computation agree upon a function to be computed and a representation of the function as a circuit with... |
| 6738907 |
Maintaining a soft-token private key store in a distributed environment |
| May-18-2004 |
Methods, systems, and devices are provided for securely updating private keys, key pairs, passwords, and other confidential information in a distributed environment. A transaction is created including... |
| 6731776 |
Image recording apparatus |
| May-4-2004 |
An image recording apparatus prints a visible watermark superimposed over an original image on recording paper. The apparatus includes a first memory for storing watermark print information, a second memory... |
| 6731755 |
Split-key cryptographic system and method |
| May-4-2004 |
A method of operating a split-key cryptographic system having two or more co-operating microprocessors, i, linked via a communications channel, involving the generation of a public modulus, N, being the... |
| 6728878 |
Deferred billing, broadcast, electronic document distribution system and method |
| Apr-27-2004 |
An electronic document delivery system and method in which a broadcast center periodically sends a "catalog" of available documents to a receiving computer, thereby allowing a user to browse through the... |
| 6728379 |
Information processor and information processing method |
| Apr-27-2004 |
An information processor receives at a communication section thereof an encrypted content decryption key generated by encrypting, by a distribution encryption key, a content decryption key for decryption... |
| 6721887 |
Data copyright management system |
| Apr-13-2004 |
A system is provided which manages the copyright of a plurality of data in a database. A data copyright management system is provided in which a primary user edits data which he or she obtains and supplies... |
| 6711264 |
Security improvement method and security system |
| Mar-23-2004 |
A security system prevents a commonly shared encryption key from being deciphered by an unwelcome party, while providing easier administration of encryption keys. The security system includes a memorizer... |
| 6697490 |
Automatic resynchronization of crypto-sync information |
| Feb-24-2004 |
An apparatus and method for transmitting and receiving cryptographic information which provide a mechanism for resynchronization between a transmitter and receiver of the cryptographic information. A cryptographic... |
| 6678821 |
Method and system for restricting access to the private key of a user in a public key infrastructure |
| Jan-13-2004 |
An encryption/decryption system for providing restricted use of each key in a plurality of keys to preserve confidentiality of the plurality of keys. Each key is usable by an associated user in a public... |
| 6674861 |
Digital audio watermarking using content-adaptive, multiple echo hopping |
| Jan-6-2004 |
A method, an apparatus and a computer program product for adaptive, content-based watermark embedding of a digital audio signal (100) are disclosed. Corresponding watermark extracting techniques are also... |
| 6668321 |
Verification of identity of participant in electronic communication |
| Dec-23-2003 |
Verifying and authenticating the identity of participants in electronic communication. A primary key generated from a master key is stored at a sending device and a recipient device. Based on the primary... |
| 6640303 |
System and method for encryption using transparent keys |
| Oct-28-2003 |
A method, system, and computer program product are provided for encrypting and decrypting information, such as electronic mail. Each party has a secret, unique, randomly assigned value y. A sender and... |
| 6618807 |
Computer system with an external and portable electronic key for encryption and decryption processes |
| Sep-9-2003 |
The present invention provides a computer system comprising a system memory, a processor, a cryptoprogram, an I/O port, and an electronic key. The electronic key can be inserted into and removed from the... |
| 6567913 |
Selective security level certificate meter |
| May-20-2003 |
A system includes a device for generating a message; structure for selecting one of a plurality of different private keys stored within the system, each of the plurality of different private keys,providing... |
| 6539094 |
Data transmission apparatus and method, data receiving apparatus and method, and data transmitting/receiving system and method |
| Mar-25-2003 |
Data to be transmitted via a serial bus in conformity with the IEEE 1394 protocol are ciphered by a ciphering/deciphering circuit, and headers are attached thereto by a header sync detecting/generating... |
| 6529602 |
Method and apparatus for the secure storage of audio signals |
| Mar-4-2003 |
A method and apparatus for recording audio so that the recording can be authenticated as to both content and time of recording is provided. The system may be implemented as a central server that is accessed... |
| 6480608 |
Method for exchanging cryptographic keys in an ATM network using multiple virtual paths or circuits |
| Nov-12-2002 |
In an Asynchronous Transfer Mode telecommunications network having a plurality of virtual paths or circuits, an encryption key used for data transmitted between a source and a receiver may be updated,... |
| 6477254 |
Network system using a threshold secret sharing method |
| Nov-5-2002 |
In a data encryption/decryption method including an encryption step and a decryption step. In the encryption step, there are prepared n pairs of secret keys and public keys in a public-key cryptographic... |
| 6463536 |
Data copyright management system |
| Oct-8-2002 |
A system is provided which manages the copyright of a plurality of data in a database. A data copyright management system is provided in which a primary user edits data which he or she obtains and supplies... |
| 6453296 |
Electronic credit system and communication apparatus |
| Sep-17-2002 |
An electronic credit system which employs terminals at a user's location, at a shop and at a credit agency. These terminals are in communication with each other; and they are constructed to send, receive... |
| 6449473 |
Security method for transmissions in telecommunication networks |
| Sep-10-2002 |
The invention related to method for providing connection security for the transmission between communicating parties in a telecommunication network, the method comprising the steps of: exchanging security... |
| 6438235 |
Media content protection utilizing public key cryptography |
| Aug-20-2002 |
A system and method for providing protection of content stored on a bulk storage media is disclosed. The technique for providing protection from unauthorized utilization of the content so stored is provided... |
| 6438234 |
Quantum cryptography device and method |
| Aug-20-2002 |
A system and method for communicating a key between two stations using an interferometric system for quantum cryptography. The method includes sending at least two light pulses over a quantum channel and... |
| 6415032 |
Encryption technique using stream cipher and block cipher |
| Jul-2-2002 |
A method is provided for generating a pseudo-random sequence of integers, and the method is applied to the encryption of messages. The method uses a key K and a pair of prime numbers p and q, where q=2p+1.... |
