| 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... |
| 6690795 |
Multiple keys for decrypting data in restricted-access television system |
| Feb-10-2004 |
An encryption system for restricted-access television systems. Multiple decryption keys are used to decrypt encrypted material which is transmitted to customers of a restricted-access television system. |
| 6668375 |
Method and system for providing build-to-order software applications |
| Dec-23-2003 |
A system and corresponding method for unlocking options in already installed software. The software is provided with all of the options on an installation medium and when the software is first received... |
| 6668323 |
Method and system for password protection of a data processing system that permit a user-selected password to be recovered |
| Dec-23-2003 |
A data processing system-based password protection system protects a resource with an access password that may be user selected. The access password and an encryption key unique to the resource are stored... |
| 6654465 |
Method of implementing a key recovery system |
| Nov-25-2003 |
A method of generating a recovery key encryption key (RKEK) in a secure manner by an integrated circuit (IC) and a key recovery escrow agent includes the steps of generating by the IC a first number having... |
| 6651167 |
Authentication method and system employing secret functions in finite Abelian group |
| Nov-18-2003 |
A method and a system for authentication whereby authentication characteristic information is not disclosed to a third party when a verifier uses a verification device of a limited scale to authenticate... |
| 6651170 |
Integrated circuit and smart card comprising such a circuit |
| Nov-18-2003 |
An integrated circuit comprises a first processing unit and a non-volatile memory for storing a key. The first processing unit is arranged to carry out a cryptographic algorithm using the stored key. The... |
| 6640305 |
Digital content protection method and apparatus |
| Oct-28-2003 |
Before use, a population of tamper-resistant cryptographic enforcement devices is partitioned into groups and issued one or more group keys. Each tamper-resistant device contains multiple computational... |
| 6614909 |
Methods, systems, and circuits for generating keys for public key cryptosystems using parallel processing for modular operations of IC cards |
| Sep-2-2003 |
Modular operations are used to perform encryption/decryption of keys in a public cryptosystem. The modular operations process a first data in parallel with a second data to provide for the processing of... |
| 6587946 |
Method and system for quorum controlled asymmetric proxy encryption |
| Jul-1-2003 |
A method of forwarding an encrypted message sent to a primary recipient having a secret key to at least one secondary recipient comprising the steps of sharing portions of the secret key among a predetermined... |
| 6577735 |
System and method for backing-up data stored on a portable audio player |
| Jun-10-2003 |
A system creates an encrypted backup copy of the compressed audio data downloaded onto a portable audio player. When a user loads a portable audio player with audio data from a CD inserted into a computer's... |
| 6549626 |
Method and apparatus for encoding keys |
| Apr-15-2003 |
A key such as a private key or key password of a private key is encrypted for storage, and may be decrypted if the private key becomes lost or unavailable. The key is encrypted by encoding, for example,... |
| 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... |
| 6532543 |
System and method for installing an auditable secure network |
| Mar-11-2003 |
A system and method for generating and remotely installing a private secure and auditable network is provided. Node identification, link, and application information is input into a template. A generator... |
| 6529603 |
Method and apparatus to reduce the risk of observation of a secret value used by an instruction sequence |
| Mar-4-2003 |
A method includes determining a recovery value for a portion of a secret value by measuring a first time value to execute an instruction sequence. The recovery value is determined as a function of the... |
| 6510349 |
Adaptive data security system and method |
| Jan-21-2003 |
A system and method for data communication with adaptive security in which a send host transmits a data stream to a receive host in packets which contain an authentication data block with an authentication... |
| 6490680 |
Access control and authorization system |
| Dec-3-2002 |
A process of encrypting an object includes applying a hash algorithm to the object, generating a random number, combining a first plurality of splits including the random number to form a working split,... |
| 6490358 |
Enabling business transactions in computer networks |
| Dec-3-2002 |
A system for creating a log of a conversation includes a convener computer and a plurality of conversation computers interconnected by a computer network. The system includes an arbiter computer and a... |
| 6483921 |
Method and apparatus for regenerating secret keys in Diffie-Hellman communication sessions |
| Nov-19-2002 |
A system and method for regenerating secret keys that have been used to encrypt communications between two parties are disclosed. The system and method involve securely escrowing only one of the private... |
| 6483920 |
Key recovery process used for strong encryption of messages |
| Nov-19-2002 |
The present invention relates to a key recovery process used for strong encryption of a message sent by an entity, which message is either to be stored locally or transmitted to another entity, the reading... |
| 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... |
| 6473508 |
Auto-recoverable auto-certifiable cryptosystems with unescrowed signature-only keys |
| Oct-29-2002 |
A method is provided for digital signature infrastructure that provides public keys which are effective only for verifying digital signatures, and are not effective for encrypting information in a way... |
| 6411716 |
Method of changing key fragments in a multi-step digital signature system |
| Jun-25-2002 |
A multi-step digital signature system and method is provided having a distributed root certifying authority 20. Messages received at the root certifying authority 20 are distributed to root certifying... |
| 6411715 |
Methods and apparatus for verifying the cryptographic security of a selected private and public key pair without knowing the private key |
| Jun-25-2002 |
Methods and apparatus are disclosed for demonstrating that a public/private key pair is cryptographically strong without revealing information sufficient to compromise the private key. A key pair can be... |
| 6408390 |
Apparatus for data copyright management system |
| Jun-18-2002 |
A data copyright management apparatus for handling data copyrights, and data of digital cash and video conference system is provided. The data copyright management apparatus comprises a CPU, ROM, EEPROM,... |
| 6397328 |
Method for verifying the expected postage security device and an authorized host system |
| May-28-2002 |
A method for verifying that the expected components of a postage metering system includes alternate embodiments for verifying a PSD coupled to a host system is the expected PSD. The method further includes... |
| 6396929 |
Apparatus, method, and computer program product for high-availability multi-agent cryptographic key recovery |
| May-28-2002 |
An apparatus, method, and computer program product for high-availability multi-agent cryptographic key recovery. The present invention defines a key recovery block that specifies allowable subsets of the... |
| 6370251 |
Traffic key access method and terminal for secure communication without key escrow facility |
| Apr-9-2002 |
Key escrow is achieved without a key escrow facility. An escrow key pair is generated and stored in the terminal. A key escrow field that includes a traffic key encrypted with the escrow key is provided... |
| 6335972 |
Framework-based cryptographic key recovery system |
| Jan-1-2002 |
A Secure Key Management Framework (SKMF) defines an infrastructure for a complete set of cryptographic services augmented with key recovery enablement. There are three major layers--the application layer... |
| 6317834 |
Biometric authentication system with encrypted models |
| Nov-13-2001 |
A method of performing biometric authentication of a person's identity including a biometric template prior to storing it in a biometric database. The encryption algorithm encrypts the biometric template... |
| 6314190 |
Cryptographic system with methods for user-controlled message recovery |
| Nov-6-2001 |
A cryptosystem is described which automatically provides an extra "message recovery" recipient(s) when an encrypted message is generated in the system. The system is typically configured such that the... |
| 6289105 |
Method and apparatus for encrypting and transferring electronic mails |
| Sep-11-2001 |
A scheme for encrypting and transferring electronic mails which enables the realization of the information management regarding encrypted electronic mails by an electronic mail manager, and the transfer... |
| 6282295 |
Auto-recoverable and auto-certifiable cryptostem using zero-knowledge proofs for key escrow in general exponential ciphers |
| Aug-28-2001 |
A method is provided for an escrow cryptosystem that is essentially overhead-free, does not require a cryptographic tamper-proof hardware implementation (i.e., can be done in software), is publicly verifiable,... |
| 6278782 |
Method of implementing a key recovery system |
| Aug-21-2001 |
A method of generating a recovery key encryption key (RKEK) in a secure manner by an integrated circuit (IC) and a key recovery escrow agent includes the steps of generating by the IC a first number having... |
| 6272632 |
System and method for controlling access to a user secret using a key recovery field |
| Aug-7-2001 |
A system and method for data recovery is described. In one embodiment, an encrypting system encrypts a message or file using a secret key (KS) and attaches a key recovery field (KRF), including an access... |
| 6272225 |
Key recovery condition encryption and decryption apparatuses |
| Aug-7-2001 |
A key recovery condition encryption apparatus includes a hashing unit, a first concatenating unit, and a condition information encryption unit. The hashing unit calculates a hash value on the basis of... |
| 6266421 |
Key recovery system and key recovery method |
| Jul-24-2001 |
The present invention has an object to overcome problems of a key recovery system using a conventional KRF system and to achieve efficient operation of the overall key recovery system. A key recovery system... |
| 6263446 |
Method and apparatus for secure distribution of authentication credentials to roaming users |
| Jul-17-2001 |
A roaming user needing an his authentication credential (e.g., private key) to access a computer server to perform an electronic transaction may obtain the authentication credential in an on-demand fashion... |
| 6256733 |
Access and storage of secure group communication cryptographic keys |
| Jul-3-2001 |
A method and apparatus for secure group communication allows on-demand procurement of stored security credentials of a group. In one embodiment, this is done by having a processor store at least a portion... |
| 6249866 |
Encrypting file system and method |
| Jun-19-2001 |
A system and method for encryption and decryption of files. The system and method operate in conjunction with the file system to transparently encrypt and decrypt files in using a public key-private key... |
| 6249585 |
Publicly verifiable key recovery |
| Jun-19-2001 |
The present invention is a system and method for publicly verifying that a session key determined according to a Diffie-Hellman key exchange can be recovered from information associated with a communication... |
| 6246771 |
Session key recovery system and method |
| Jun-12-2001 |
A system and method for providing access to an encrypted communication involves recording the session during which the communication is encrypted, replaying the session to recover data used to recover... |
| 6243466 |
Auto-escrowable and auto-certifiable cryptosystems with fast key generation |
| Jun-5-2001 |
A method is provided for an escrow cryptosystem that is overhead-free, does not require a cryptographic tamper-proof hardware implementation (i.e., can be done in software), is publicly verifiable, and... |
| 6237097 |
Robust efficient distributed RSA-key generation |
| May-22-2001 |
The invention provides for robust efficient distributed generation of RSA keys. An efficient protocol is one which is independent of the primality test "circuit size", while a robust protocol allows correct... |
| 6236729 |
Key recovery method and system |
| May-22-2001 |
A key recovery method and system capable of key recovery without informing a third party of one's own secret key are disclosed. For realization of the method, a transmitting information processor generates... |
| 6216229 |
Method for preventing inadvertent betrayal by a trustee of escrowed digital secrets |
| Apr-10-2001 |
The invention employs a voluntary identification/definition phase performed, for example, shortly after a computer is purchased, and a secret information retrieval phase. In the definition phase, the true... |
| 6215872 |
Method for creating communities of trust in a secure communication system |
| Apr-10-2001 |
A method and apparatus for creating communities of trust within a secure communications system is accomplished by allowing end-users to obtain arbitrary lists of trusted public keys from other end-users... |
| 6199052 |
Secure electronic transactions using a trusted intermediary with archive and verification request services |
| Mar-6-2001 |
Secure electronic transactions using a trusted intermediary with non-repudiation of receipt and contents of message. A system of, and method for, securely transmitting a package from a sender to a recipient,... |
| 6192130 |
Information security subscriber trust authority transfer system with private key history transfer |
| Feb-20-2001 |
A first trusted authority, such as an originating certification authority, that stores key history data, such as private decryption keys for one or more subscribers, includes a key history exportation... |
| 6185308 |
Key recovery system |
| Feb-6-2001 |
A key recovery information distribution device is provided between a recoverer device and a key recovery device, recovers a data key for the recoverer device, and reduces the load of the recoverer device.... |
