| 6424714 |
Method and apparatus for providing conditional access in connection-oriented interactive networks with a multiplicity of service providers |
| Jul-23-2002 |
A control system provides secure transmission of programs, including at least one of video, audio, and data, between a service provider and a customer's set top unit over a digital network. Program bearing... |
| 6424718 |
Data communications system using public key cryptography in a web environment |
| Jul-23-2002 |
Described is a communications system in which messages may be processed using public key cryptography with a private key (SKu) unique to one or more users (150). The system comprises a server means (130)... |
| 6418224 |
Methods and apparatus for self-inverting multiple-iteration CMEA crypto-processing for improved security for wireless telephone messages |
| Jul-9-2002 |
A self-inverting enhanced CMEA encryption system suitable for use in wireless telephony. An unprocessed text message is introduced into the system and subjected to a first iteration of a CMEA process,... |
| 6418225 |
Method and apparatus for feature configuration in remotely located ultrasound imaging system |
| Jul-9-2002 |
A method and apparatus for configuring an ultrasound imaging system at a remote location by obtaining an encrypted feature key from a central location (e.g., via telephone) and then inputting that feature... |
| 6408389 |
System for supporting secured log-in of multiple users into a plurality of computers using combined presentation of memorized password and transportable passport record |
| Jun-18-2002 |
A system is disclosed for controlling intelligible access to secured files by means of a user-memorized password in combination with a user-associated passport record. The passport record takes on two... |
| 6393564 |
Decrypting device |
| May-21-2002 |
The decrypting device of this invention includes: a decrypting key generation circuit for generating a decrypting key based on first decrypting key information and second decrypting key information; and... |
| 6370250 |
Method of authentication and storage of private keys in a public key cryptography system (PKCS) |
| Apr-9-2002 |
Private keys for a public key cryptography system are protected within private key storage and communication by the requirement of a password to extract the private key based on a password during decryption.... |
| 6370249 |
Method and apparatus for public key management |
| Apr-9-2002 |
A method and apparatus for public key management is accomplished when an associated authority provides, from time to time, a public key of at least one of a plurality of certificate authorities to a client.... |
| 6363152 |
Hybrid one time pad encryption and decryption apparatus with methods for encrypting and decrypting data |
| Mar-26-2002 |
A hybrid one time pad encryption and decryption apparatus with methods for encrypting and decrypting data wherein a one time random number pad provides high security encryption. The random number sequence... |
| 6339828 |
System for supporting secured log-in of multiple users into a plurality of computers using combined presentation of memorized password and transportable passport record |
| Jan-15-2002 |
A system is disclosed for controlling intelligible access to secured files by means of a user-memorized password in combination with a user-associated passport record. The passport record takes on two... |
| 6338139 |
Information reproducing apparatus, authenticating apparatus, and information processing system |
| Jan-8-2002 |
In this invention, an information recording/reproducing apparatus has an authentication function and directly transfers information to an MPEG board, sub-picture run-length board, speech coding/decoding... |
| 6338140 |
Method and system for validating subscriber identities in a communications network |
| Jan-8-2002 |
A method and/or system for validating subscribers includes an insecure communications network, such as, an IS-41 wireless telephone network connecting a plurality of telephone switches. A subscriber or... |
| 6337911 |
Deferred billing, broadcast, electronic document distribution system and method |
| Jan-8-2002 |
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... |
| 6337910 |
Method and apparatus for generating one time pads simultaneously in separate encryption/decryption systems |
| Jan-8-2002 |
A method for simultaneously generating one time pads and an apparatus which implements the method to produce a secure encryption system. The method and apparatus use the Diffie-Hellman key exchange algorithm... |
| 6332025 |
Software distribution system and software utilization scheme for improving security and user convenience |
| Dec-18-2001 |
A software distribution system and a software utilization scheme for effectively preventing an illegal copy of a software is difficult while improving a convenience of a user. At a user side, a shared... |
| 6330334 |
Method and system for information dissemination using television signals |
| Dec-11-2001 |
A system and method of information dissemination that permits the user to listen to the specific content of information when and where he or she wants to. A radio or television receiver system receives... |
| 6292899 |
Volatile key apparatus for safeguarding confidential data stored in a computer system memory |
| Sep-18-2001 |
The data security system uses a volatile key apparatus to create and manage a master file, comprising a single encrypted file that is stored on the hard drive of the computer system. The master file contains... |
| 6289455 |
Method and apparatus for preventing piracy of digital content |
| Sep-11-2001 |
A secure cryptographic rights unit for cryptographically regulating access to digital content includes an interface control processor and a specialized cryptographic unit that protects access to a memory.... |
| 6282651 |
Security system protecting data with an encryption key |
| Aug-28-2001 |
Proprietary information such as programs and/or data are protected using a secure processing system that includes a memory such as an EPROM in which the proprietary information is stored in a first portion... |
| 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... |
| 6263435 |
Dual encryption protocol for scalable secure group communication |
| Jul-17-2001 |
A logical tree structure and method for managing membership in a multicast group provides scalability and security from internal attacks. The structure defines key groups and subgroups, with each subgroup... |
| 6260142 |
Access and storage of secure group communication cryptographic keys |
| Jul-10-2001 |
A method and apparatus for secure group communication detects the deletion of a member of the group and uses the detected deletion to update the security credentials of a group by updating a repository... |
| 6246770 |
Method and apparatus for feature configuration in remotely located ultrasound imaging system |
| Jun-12-2001 |
A method and apparatus for configuring an ultrasound imaging system at a remote location by obtaining an encrypted feature key from a central location (e.g., via telephone) and then inputting that feature... |
| 6226618 |
Electronic content delivery system |
| May-1-2001 |
Disclosed is a method and apparatus of securely providing data to a user's system. The data is encrypted so as to only be decryptable by a data decrypting key, the data decrypting key being encrypted using... |
| 6222923 |
Method for securing system protected by a key hierarchy |
| Apr-24-2001 |
A method for securing a system protected by a predefined hierarchy of cryptographic keys, and in particular, for securing a pay TV system, against unauthorized users. An individual cryptographic key assigned... |
| 6215878 |
Group key distribution |
| Apr-10-2001 |
A method for distributing a secret key from a key holder H to intended group members M. The method assumes that during the distribution process each party, a group member M and the key holder H, can decrypt... |
| 6212281 |
Digital signature protocol |
| Apr-3-2001 |
A digital signature protocol generates a signature component using a hash of an encrypted message. The component and encrypted message form a signature pair that is forwarded to a recipient. The encryption... |
| 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.... |
| 6175922 |
Electronic transaction systems and methods therefor |
| Jan-16-2001 |
A method and apparatus is disclosed for approving a transaction request between an electronic transaction system and a portable electronic authorization device (PEAD) carried by a user using an electronic... |
| 6163612 |
Coding device, decoding device and IC circuit |
| Dec-19-2000 |
A coding device, a decoding device, and an IC card capable of establishing highly reliable security are disclosed. A random number determining section 11, using a random number generating procedure selected... |
| 6151676 |
Administration and utilization of secret fresh random numbers in a networked environment |
| Nov-21-2000 |
In a public key cryptosystem employing the El-Gamal algorithm, secret fresh random numbers are generated at a server and private keys of users, as encrypted with a symmetric algorithm by using individual... |
| 6128391 |
Method and apparatus for asymetric key management in a cryptographic system |
| Oct-3-2000 |
A method and apparatus for asymmetrical key management in a cryptographic system is provided. Embodiments of the invention implement varying levels of diversification to manage the encryption keys. In... |
| 6122742 |
Auto-recoverable and auto-certifiable cryptosystem with unescrowed signing keys |
| Sep-19-2000 |
A method is provided for an escrow cryptosystem combined with an unescrowed digital signature scheme that uses a single public key per user. This system is overhead-free, does not require a cryptographic... |
| 6108424 |
Mobile radio telephone station comprising a protection system for at least one authentication number and method of protecting an authentication number |
| Aug-22-2000 |
The mobile station comprises Traffic Identification Encryption means (TIE) and a memory (54) for storing at least one authentication number (A-key). According to the invention, the protection system comprises... |
| 6105131 |
Secure server and method of operation for a distributed information system |
| Aug-15-2000 |
A secure server in a secure distributed information system isolates interaction from terminals to specific personal vaults including and to only those personal vaults, creating a "virtual logon". The secure... |
| 6073237 |
Tamper resistant method and apparatus |
| Jun-6-2000 |
A method for securing data in a tamper resistant fashion on a computer connected to a network. The presence of a user on a network is established using one protocol with routine operations conducted by... |
| 6069957 |
Method and apparatus for providing hierarchical key system in restricted-access television system |
| May-30-2000 |
An encryption system for restricted-access television systems. Decryption keys, which are used to decrypt program material, are transmitted to customers in a restricted-access television system. The keys... |
| 6058193 |
System and method of verifying cryptographic postage evidencing using a fixed key set |
| May-2-2000 |
A method for controlling keys used in the verification of encoded information generated by a transaction evidencing device and printed on a document comprises the steps of generating a plurality of random... |
| 6052468 |
Method of securing a cryptographic key |
| Apr-18-2000 |
A method is disclosed for improving portability of secure encryption key data files. The method provides for re-securing key data files according to different security processes for mobility. For porting... |
| 6044468 |
Secure transmission using an ordinarily insecure network communication protocol such as SNMP |
| Mar-28-2000 |
An encryption service in a manager encrypts network management information with a secret key that can be recognized by an agent to which the message is directed. The encryption service invokes an SNMP... |
| 6044155 |
Method and system for securely archiving core data secrets |
| Mar-28-2000 |
The invention provides central storage for core data secrets, referred to as data items. The data items are encrypted by a client computer using a client key that is derived from a logon secret, such as... |
| 6038322 |
Group key distribution |
| Mar-14-2000 |
A method for distributing a secret key from a key holder H to intended group members M. The method assumes that during the distribution process each party, a group member M and the key holder H, can decrypt... |
| 6005940 |
System for securely storing and reading encrypted data on a data medium using a transponder |
| Dec-21-1999 |
A self contained data medium is provided with an apparatus for generating a decrypting key for decrypting stored data. Frames of encrypted data are stored on the data medium such as a video or audio disk.... |
| 5999629 |
Data encryption security module |
| Dec-7-1999 |
We have recognized that there is a strong need to control and maintain the secrecy of the intelligence that may be used by computers to communicate with another, for example, by encrypting the messages... |
| 5999623 |
Broadcast data access controller communication system |
| Dec-7-1999 |
Disclosed is a method and apparatus for enabling an authorized receiver station to decrypt encrypted information broadcast by a transmitter station, and for decrypting the information within the authorized... |
| 5894516 |
Broadcast software distribution |
| Apr-13-1999 |
A method, apparatus, and article of manufacture for broadcasting encrypted software to a target computer enables simultaneous transmission to a plurality of licensed target computers. An encryption key... |
| 5875247 |
System for decrypting encrypted software |
| Feb-23-1999 |
A CD-ROM stores encrypted software. When a user desires to decrypt and install this software, an approval preparatory key is generated by an installer. This approval preparatory key is generated based... |
| 5832083 |
Method and device for utilizing data content |
| Nov-3-1998 |
The present invention provides a data content utilizing device having data storing section for storing information obtained by encoding data contents and content identification information specifying the... |
| 5825881 |
Public network merchandising system |
| Oct-20-1998 |
A system for conducting commerce over a large public network such as the Internet. The system facilitates communications between a merchant, a customer, and a bank or credit card processor. |
| 5815573 |
Cryptographic key recovery system |
| Sep-29-1998 |
A cryptographic key recovery system for generating a cryptographic key for use by a pair of communicating parties while simultaneously providing for its recovery using one or more key recover agents. A... |
