| 7039192 |
Methods for data encryption using multiple layer steganography |
| May-2-2006 |
A method for embedding a message within a file may include generating a session key [305] and encrypting the session key with a public key to produce an encrypted session key [310]. The message... |
| 7039191 |
Chaining key broadcasting reception system and chaining key broadcasting reception method |
| May-2-2006 |
In the chaining key broadcasting reception system, a chaining key reception unit receives a chaining key, an identifier of the key in question and a target key identifier indicative of a chaining key to... |
| 7016499 |
Secure ephemeral decryptability |
| Mar-21-2006 |
A method and apparatus for securely communicating ephemeral information from a first node to a second node. In a first embodiment, the first node encodes and transmits an ephemeral message encrypted at... |
| 7010685 |
Method and apparatus for storing scrambled digital programs by filtering product identifier |
| Mar-7-2006 |
In accordance with one embodiment, a method for storing a normal scrambled digital program is provided. The method includes receiving a scrambled program, and receiving a plurality of access requirements.... |
| 7010125 |
Method for tracing traitor receivers in a broadcast encryption system |
| Mar-7-2006 |
A method for tracing traitor receivers in a broadcast encryption system. The method includes using a false key to encode plural subsets representing receivers in the system. The subsets are derived from... |
| 7007170 |
System, method, and apparatus for securely providing content viewable on a secure device |
| Feb-28-2006 |
A system, apparatus, and method are directed to providing and securely viewing secure content. In one embodiment, a secure player provides secure screening/previewing of secure content, such as a motion... |
| 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... |
| 6978376 |
Information security architecture for encrypting documents for remote access while maintaining access control |
| Dec-20-2005 |
A method of controlling distribution of a segment of encrypted electronic information is presented. A key server receives a protected copy of a decryption key for the segment. The segment is retrieved... |
| 6975728 |
Hierarchical key management |
| Dec-13-2005 |
The present invention discloses a general-purpose hierarchical key management method and apparatus whose trusted operation, with respect to compromise of keying material, does not depend upon the controlling... |
| 6970566 |
Network system and method for secure communication service |
| Nov-29-2005 |
A network system providing secure service facility has a central control & management equipment to enable unified key management. The network includes a plurality of switching equipment and central control... |
| 6965992 |
Method and system for network security capable of doing stronger encryption with authorized devices |
| Nov-15-2005 |
A method and system for network security includes a first network device having a first set of key material with a base key and a key extension, and a second network device also having the first set of... |
| 6961858 |
Method and system to secure content for distribution via a network |
| Nov-1-2005 |
A method and system to secure content for distribution via a communications network commences when a user device authentication process is associated with content from a content provider. A copy-protected... |
| 6959390 |
Data processing system and method for maintaining secure user private keys in non-secure storage |
| Oct-25-2005 |
A data processing system and method are disclosed for maintaining secure user private keys in a non-secure storage device. A master key pair is established for the system. The master key pair includes... |
| 6956950 |
Computer readable medium having a private key encryption program |
| Oct-18-2005 |
A digital wallet stores an cryptographically camouflaged access-controlled datum, e.g., a private key encrypted under the user's PIN. Entry of the correct PIN will correctly decrypt the stored key. Entry... |
| 6950523 |
Secure storage of private keys |
| Sep-27-2005 |
To protect a private cryptographic key, two values are derived. The two values together can reconstruct the key. One value is sent to a server and deleted from the local machine. The other value is held... |
| 6947556 |
Secure data storage and retrieval with key management and user authentication |
| Sep-20-2005 |
Methods, systems and computer program products are provided which provide for controlling access to digital data in a file by encrypting the data with a first key, encrypting the first key with a second... |
| 6944778 |
Method for testing an integrated circuit including hardware and/or software parts having a confidential nature |
| Sep-13-2005 |
This method uses a tester (T) capable of being connected to an integrated circuit (CI) to be tested. A random number (RNG-C) is generated and ciphered using a key (k) by a cipher algorithm to obtain a... |
| 6912655 |
Network security architecture system utilizing seals |
| Jun-28-2005 |
An efficient multicast key management is achieved by using seals. A security server generates a seal. In one embodiment, the seal contains a key. In another embodiment, the seal contains information for... |
| 6891953 |
Method and system for binding enhanced software features to a persona |
| May-10-2005 |
A server architecture for a digital rights management system that distributes and protects rights in content. The server architecture includes a retail site which sells content items to consumers, a fulfillment... |
| 6889208 |
Contents sale system |
| May-3-2005 |
In a contents sale system, original contents data are encrypted into encryption-resultant contents data in response to original playback key data. The original playback key data are encrypted into first... |
| 6889207 |
Content control in a device environment |
| May-3-2005 |
Devices and methods are disclosed for controlling content within a device environment through interaction among electronic devices of the environment. The device has a transmitter, receiver, memory storing... |
| 6876744 |
Methods and apparatus for enhanced CMEA including a CMEA iteration preceded and followed by transformations and employing an involuntary lookup |
| Apr-5-2005 |
Methods and apparatus for enhanced CMEA, or ECMEA, processing. A forward ECMEA and a reverse ECMEA process are provided. The forward ECMEA process decrypts text encrypted by the reverse ECMEA process and... |
| 6857071 |
System and method for distributing digital works, apparatus and method for reproducing digital works, and computer program product |
| Feb-15-2005 |
An editing apparatus generates a capsular work in which usage conditions for each of plural usages and usage secret information, obtained by encrypting a decryption key encrypted work data with ticket... |
| 6845160 |
Apparatus and method for depositing encryption keys |
| Jan-18-2005 |
An encryption key depositing apparatus comprising a unit that generates an encryption key for a user; and a unit that starts a process in response to the generation of the encryption key, the process allowing... |
| 6834110 |
Multi-tier digital TV programming for content distribution |
| Dec-21-2004 |
A method of securely providing data to a user's system over a broadcast infrastructure. The method comprising the steps of: encrypting the data using a first encrypting key; encrypting a first decrypting... |
| 6831982 |
Encryption key management system using multiple smart cards |
| Dec-14-2004 |
Initially, a key range variable is created by concatenating the card group value, card number and reference number for an encryption key to be generated. A hashing algorithm generates an encryption key... |
| 6819766 |
Method and system for managing keys for encrypted data |
| Nov-16-2004 |
A computer system and method manages encryption keys for data. The system and method generates a session key and encrypts given data with the session key. The system and method generates a key encryption... |
| 6807277 |
Secure messaging system with return receipts |
| Oct-19-2004 |
A method and system for electronic messaging in which a sender of an electronic message receives a return receipt, without having to send the message contents to a third party. The sender contacts a server... |
| 6795555 |
Encryption key exchange protocol |
| Sep-21-2004 |
The calculation of encryption keys is a processor intensive undertaking that is not suited for "thin client" terminal devices typically used for session applications in an Internet Protocol network. The... |
| 6792545 |
Enterprise computer investigation system |
| Sep-14-2004 |
A method, apparatus and system for secure forensic investigation of a target machine by a client machine over a communications network. In one aspect the method comprises establishing secure communication... |
| 6785390 |
System and method for asynchronous decryption |
| Aug-31-2004 |
A system and method of receiving and decrypting encrypted data using a key based upon an initial key used for encryption that is received at a receiving unit whereby a key is generated from the initial... |
| 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... |
| 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... |
| 6728378 |
Secret key messaging |
| Apr-27-2004 |
The invention provides computer-enabled methods and systems for the secure transmission and platform-independent receipt and decryption of encrypted messages. According to the invention messages are encrypted... |
| 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... |
| 6718467 |
Password based protocol for secure communications |
| Apr-6-2004 |
A method for a first participant to establish a shared secret with a second participant, where the first participant and the second participant share a password-based first master key and a hash function... |
| 6694025 |
Method and apparatus for secure distribution of public/private key pairs |
| Feb-17-2004 |
A list of public/private key pairs are stored at a server, wherein the private key is stored in an encrypted form, the encryption being based on a master key. To distribute a public/private key pair to... |
| 6683954 |
Key encryption using a client-unique additional key for fraud prevention |
| Jan-27-2004 |
Encryption of a key using another key that is unique and particular to a given client is disclosed. In one embodiment, a computer-implemented method determines a first key that is unique and particular... |
| 6671377 |
System and method for downloading network information to mobile stations for location calculation |
| Dec-30-2003 |
A telecommunications system and method is disclosed for downloading encrypted network information, such as Base Transceiver Station (BTS) coordinates, in a point-to-point manner between the network and... |
| 6571337 |
Delayed secure data retrieval |
| May-27-2003 |
A method, apparatus and article of manufacture for a computer-implemented method of delayed secure data retrieval. Actual data entities are not packed into an information entity. Rather, the data entities... |
| 6560707 |
Multimedia coordination system |
| May-6-2003 |
In a network, a media coordination system provides secure multimedia communication channels in a collaborative network environment. The media coordination system provides automatic encryption, dynamic... |
| 6560705 |
Content screening with end-to-end encryption prior to reaching a destination |
| May-6-2003 |
One embodiment of the present invention provides a system that performs content screening on a message that is protected by end-to-end encryption. The system operates by receiving an encrypted message... |
| 6546486 |
Content screening with end-to-end encryption within a firewall |
| Apr-8-2003 |
One embodiment of the present invention provides a system that performs, content screening on a message that is protected by end-to-end encryption. The system operates by receiving an encrypted message... |
| 6535607 |
Method and apparatus for providing interoperability between key recovery and non-key recovery systems |
| Mar-18-2003 |
A method and apparatus for ensuring that a key recovery-enabled (KR-enabled) system communicating with a non-KR-enabled system in a cryptographic communication system transmits the information necessary... |
| 6505302 |
Authentication for secure devices with limited cryptography |
| Jan-7-2003 |
Authentication is provided for secure devices with limited cryptography, particularly for devices which do not have the capability to do public-key cryptography and generate random numbers. An initialization... |
| 6493103 |
Image communicating method, facsimile type electronic mail apparatus and facsimile apparatus |
| Dec-10-2002 |
A particular image written in a particular paper of a particular paper size is scanned by a scanner to produce image data, a format of the image data is changed to a mail format to change the image data... |
| 6490685 |
Storage device having testing function and memory testing method |
| Dec-3-2002 |
A flash memory includes an encoded cryptographic key "k" stored therein. A protected ROM, an external access to which is inhibited, includes a decoding program stored therein to decode the cryptographic... |
| 6490353 |
Data encrypting and decrypting apparatus and method |
| Dec-3-2002 |
A crytography method of encrypting data is disclosed. The method provides for creating or selecting a master key. Thereafter, the data to be encrypted is segmented into data blocks of equal or variable... |
| 6459794 |
Process for scrambling and process for descrambling digital video data and devices implementing the processes |
| Oct-1-2002 |
The invention relates to a process for scrambling video data in the MPEG2 video format as well as to a process for descrambling data scrambled according to the process of the invention. The scrambled video... |
| 6438550 |
Method and apparatus for client authentication and application configuration via smart cards |
| Aug-20-2002 |
A data processing system for accessing a host computer. A smart card is detected at the data processing system, which in turn queries the smart card for an indication of a location of user information.... |
