| 7039816 |
Using smartcards or other cryptographic modules for enabling connected devices to access encrypted audio and visual content |
| May-2-2006 |
To prevent piracy, audiovisual content is encrypted prior to transmission to consumers. A low-cost, high-security cryptographic rights module (such as a smartcard) enables devices such as players/displays... |
| 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... |
| 7007164 |
Method and array for authenticating a first instance and a second instance |
| Feb-28-2006 |
In order to authenticate a first entity at a second entity, a first number is generated by way of an asymmetric cryptographic method. This first number is symmetrically encoded and transmitted to the second... |
| 6999588 |
Image input apparatus, image input method, recording medium, and encryption processing program stored in computer-readable medium |
| Feb-14-2006 |
In an image input apparatus provided with an image pick-up unit, an image signal generated by the image pick-up unit is converted into digital information. The digital information is then encrypted by... |
| 6987855 |
Operational optimization of a shared secret Diffie-Hellman key exchange among broadcast or multicast groups |
| Jan-17-2006 |
An optimized approach for arriving at a shared secret key in a multicast or broadcast group environment is disclosed. The key exchange method is mathematically equivalent to the standard broadcast version... |
| 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... |
| 6975730 |
Method and apparatus for contents information |
| Dec-13-2005 |
A first-key signal representative of a first key is generated from first-key base information being a base of the first key. Contents information is encrypted into encryption-resultant contents information... |
| 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... |
| 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... |
| 6952773 |
Requesting execution of instructions on accounts in ABDS system |
| Oct-4-2005 |
A method of requesting an account authority to execute an instruction with regard to an account maintained by the account authority includes, (a) for a first account, composing an electronic message including,... |
| 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... |
| 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.... |
| 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... |
| 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... |
| 6854061 |
Installing and controlling trial software |
| Feb-8-2005 |
According to one aspect of the invention, a method of creating a trial software product on a target system is provided. The method consists of intercepting file system calls from an installation process... |
| 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... |
| 6816970 |
Security method and system for persistent storage and communications on computer network systems and computer network systems employing the same |
| Nov-9-2004 |
A multi-stage login procedure and system involves a first stage in which a login ID and a public key (encrypted) is transmitted from a client computer to a server computer and a key-exchange key (encrypted)... |
| 6801999 |
Passive and active software objects containing bore resistant watermarking |
| Oct-5-2004 |
A technique for imparting substantial break-once-run-everywhere (BORE) resistance to passive and active software objects, and for controlling access and use of resulting protected objects by a client computer... |
| 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... |
| 6792113 |
Adaptable security mechanism for preventing unauthorized access of digital data |
| Sep-14-2004 |
Content such as computer software, data representing audiovisual works, and electronic documents can converted from a machine-bound state to user-bound state without modification to the content data itself.... |
| 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... |
| 6775773 |
Protectedly reading out an enciphered, cryptographic key |
| Aug-10-2004 |
Method and apparatuses for protectedly reading out an enciphered, cryptographic key (K.sub.sec) stored in a first memory (2) of a first communication apparatus (8; 8'), comprising the following steps:... |
| 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... |
| 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... |
| 6711680 |
Method of limiting key usage in a postage metering system that produces cryptographically secured indicium |
| Mar-23-2004 |
A method and system for generating messages from which it can be verified that a variable does not exceed a predetermined limit. The message can be a postal indicium. A message originator, which can be... |
| 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. |
| 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... |
| 6530020 |
Group oriented public key encryption and key management system |
| Mar-4-2003 |
In a public key encryption system where an individual is used as a unit, an idea of "group" is newly introduced. Then, both an encryption process operation of a plain text by an arbitrary member belonging... |
| 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... |
| 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... |
| 6457126 |
Storage device, an encrypting/decrypting device and method of accessing a non-volatile memory |
| Sep-24-2002 |
A storage device (10) has a flash memory (11), a controller (16) and a second ROM (15). In the flash memory (11), a data key is stored, which is a key unique to each storage device (10). In the second... |
| 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... |
| 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... |
| 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,... |
| 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... |
| 6393128 |
System for broadcasting data signals in a secure manner |
| May-21-2002 |
A system for broadcasting data signals in a secure manner comprises means for encrypting the data signals using a first key, means for broadcasting the encrypted data signals to subscribers, means for... |
| 6393127 |
Method for transferring an encryption key |
| May-21-2002 |
Encryption keys are transferred by obtaining a public and private key pair (42, 65) from a source device (21, 61). The public key is transmitted (42, 65) from the source device (43, 66) to a target device... |
| 6377692 |
Method and system for controlling key for electronic signature |
| Apr-23-2002 |
Two keys which are updated in the same updating cycle at different times are prepared as signature keys (main key and auxiliary key) for electronic signature, and the updating cycle of each key is divided... |
| 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.... |
| 6347145 |
Method and apparatus of enciphering and deciphering data using keys enciphered and deciphered with other keys |
| Feb-12-2002 |
On a recording medium, first information obtained by enciphering data with the first key and second information obtained by enciphering the first key with each of the predetermined second keys are recorded.... |
| 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... |
| 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... |
| 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... |
| 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... |
| 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... |
