| 6336188 |
Authenticated key agreement protocol |
| Jan-1-2002 |
A key agreement method between a pair of entities i and j in a digital communication system, wherein each the entity has a private and corresponding public key pair S.sub.i,P.sub.i and S.sub.j,P.sub.j... |
| 6332192 |
Generalized user identification and authentication system |
| Dec-18-2001 |
The invention features a method for providing a user access to a secure application. The invention stores in an encrypted form the authentication information necessary to satisfy the authentication requirements... |
| 6330671 |
Method and system for secure distribution of cryptographic keys on multicast networks |
| Dec-11-2001 |
A method and apparatus for secure and scalable key management in a multicast network environment is provided. In a first portion, one or more seed nodes on the network receive a multicast transmission... |
| 6327660 |
Method for securing communications in a pre-boot environment |
| Dec-4-2001 |
Briefly, one embodiment of the present invention relates to a method comprising the act of providing a communication link between a first electronic system and a second electronic system. Prior to booting... |
| 6324287 |
Pad encryption method and software |
| Nov-27-2001 |
A pad encryption software architecture includes space on a floppy for storing the pad to be used with the encryption software. The pad is XOR generated with random numbers subject to redetermined offsets.... |
| 6317499 |
Storage device random bit generator |
| Nov-13-2001 |
The present invention is an apparatus for generating random bits from a computer system. The apparatus comprises a rotating storage device operating within the computer system. A rotational latency of... |
| 6308268 |
Portable electronic device for safe communication system, and method for initializing its parameters |
| Oct-23-2001 |
This device includes data storage unit, interface unit with an external tool for loading data into the storage unit, data processing unit including initialization unit for enabling modification of a specific... |
| 6307940 |
Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof |
| Oct-23-2001 |
In a cryptosystem which performs encryption/deciphering of communication text using k bits of cryptographically secure pseudo-random numbers as the block cipher key thereof, the block cipher key is updated... |
| 6307936 |
Cryptographic key management scheme |
| Oct-23-2001 |
A key management scheme for managing encryption keys in a cryptographic co-processor includes the first step of selecting a key from one of a symmetrical key type and an asymmetrical key type. Then, the... |
| 6301658 |
Method and system for authenticating digital certificates issued by an authentication hierarchy |
| Oct-9-2001 |
A method and system for efficiently authenticating digital certificates issued by an organization's authentication hierarchy. The system includes a verification server that manages a certificate repository... |
| 6298153 |
Digital signature method and information communication system and apparatus using such method |
| Oct-2-2001 |
A digital signature method including a public information generating step of generating public information specific to each user in accordance with a public parameter common to each user and secret information... |
| 6292892 |
Apparatus and method for providing secured communications |
| Sep-18-2001 |
In one embodiment, a method to provide reliable electronic distribution of information between a first system and a second system remotely located from the first system coupled together by a communication... |
| 6282649 |
Method for controlling access to electronically provided services and system for implementing such method |
| Aug-28-2001 |
The security of stored data and applications is improved by and access control system and method in which user keys for accessing the stored data/services which keys are provided to users are representative... |
| 6278783 |
Des and other cryptographic, processes with leak minimization for smartcards and other cryptosystems |
| Aug-21-2001 |
Methods and apparatuses are disclosed for improving DES and other cryptographic protocols against external monitoring attacks by reducing the amount (and signal-to-noise ratio) of useful information leaked... |
| 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... |
| 6266420 |
Method and apparatus for secure group communications |
| Jul-24-2001 |
A method for securing group communications with reduced message overhead begins by initiating a secure group communication, where a group communication is secured based on security credentials of the group.... |
| 6266416 |
Protection of software against use without permit |
| Jul-24-2001 |
An arrangement to protect software, particularly freely distributed application software, against utilization without permission of the copyright holder. By encrypting the software employing a key (k1)... |
| 6259791 |
Method and apparatus in a wireless messaging system for controlling a hierarchical provision of service |
| Jul-10-2001 |
A first service provider having a highest security of access, initially programs (604) tables in a subscriber unit (122), including an address table (224) having entries including addresses to which the... |
| 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... |
| 6247132 |
Electronic equipment, method of controlling operation thereof and controlling method |
| Jun-12-2001 |
A method and apparatus for controlling communication between components connected to a bus. All equipment manufacturers may use every application available on each connected apparatus by using a unique... |
| 6246768 |
Data encryption system for encrypting plaintext data |
| Jun-12-2001 |
In order to encrypt plaintext data while maintaining high security, the plaintext data is received and divided into a plurality of plaintext data blocks, each of which has the same bit length. A preset... |
| 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... |
| 6237098 |
System for protecting weight verification device private key |
| May-22-2001 |
The present invention is a Weight Verification Device (WVD) that stamps a weight transaction record with a digital signature so that transaction data may be verified at a later time. The WVD is an Application... |
| 6233341 |
System and method for installing and using a temporary certificate at a remote site |
| May-15-2001 |
A system installs and enables the use of a temporary certificate at a remote site. The system comprises a global server site, a temporary client site and a web site. The global server site includes a security... |
| 6230267 |
IC card transportation key set |
| May-8-2001 |
Method and apparatus for securely transporting data onto an IC card. The method is used, for example, to transport data, including application programs, in a secure manner from a source located outside... |
| 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... |
| 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... |
| 6215877 |
Key management server, chat system terminal unit, chat system and recording medium |
| Apr-10-2001 |
A key management server is arranged at the same position as a terminal unit as viewed from a chat server. A channel secret key unique to each channel is generated by the key management server and distributed... |
| 6215745 |
Decoding key recorded at a recording site in order to decode information transmitted to that site is encoded with information specific to the recording site |
| Apr-10-2001 |
A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced, the data recording apparatus... |
| 6212636 |
Method for establishing trust in a computer network via association |
| Apr-3-2001 |
A method is disclosed for establishing trusted communications with associations for communications between users on an Internet Protocol based computer network. The method entails the first user's SNIU... |
| 6195432 |
Software distribution system and software utilization scheme for improving security and user convenience |
| Feb-27-2001 |
A software distribution system and a software utilization scheme for effectively preventing an illegal copy or a software is difficult while improving a convenience of a user. At a user side, a shared... |
| 6192473 |
System and method for mutual authentication and secure communications between a postage security device and a meter server |
| Feb-20-2001 |
A method is provided for establishing mutual authentication and secure communications between an microprocessor-based transaction evidencing device and a microprocessor-based server coupled thereto. A... |
| 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... |
| 6178244 |
Cryptosystem |
| Jan-23-2001 |
In a cryptosystem, communication terminals and encryptors can be grouped physically and logically. The communication mode can be switched by the encryptor between ciphertext communication and plaintext... |
| 6169805 |
System and method of operation for providing user's security on-demand over insecure networks |
| Jan-2-2001 |
Secure communication may be conducted between two or more parties over a network, e.g the Internet without prior security arrangements among the parties or agreed to encryption/decryption software. A sending... |
| 6169804 |
Method for verifying the expected postage security device and its status |
| Jan-2-2001 |
A secure and reliable method for verifying in the host system that the expected PSD is coupled to the host system includes generating a random number in the host system and encrypting the random number... |
| 6167515 |
Method and system for performing the transmission of private data over a public network |
| Dec-26-2000 |
A method and system for performing private transmission between some special network nodes of a public network. First, a network node serving as a transmitter sends a format packet incorporating user-defined... |
| 6167136 |
Method for preventing copying of digital video disks |
| Dec-26-2000 |
A method for securely storing analog or digital data on a data storage medium. An analog information signal is combined with a noise signal. The composite noise and information signal is encrypted with... |
| 6160891 |
Methods and apparatus for recovering keys |
| Dec-12-2000 |
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,... |
| 6160890 |
Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded |
| Dec-12-2000 |
A transmission apparatus 100 includes a secret key storage unit 103 that stores three secret keys K1, K2 and K3, a secret key selection unit 104 that selects one secret key Ks from the secret keys, a message... |
| 6157723 |
Method and apparatus for secure communications with encryption key scheduling |
| Dec-5-2000 |
A communication device (122) supports secure communications using automated encryption key scheduling. The communication device (122) is provided with access to one or more schedules having entries of... |
| 6151394 |
Encrypted communication system that limits the damage caused when a secret key has been leaked |
| Nov-21-2000 |
In an encrypted transmission system composed of one transmission apparatus 10 and twenty-eight reception apparatuses A1-G4 that are classified into seven groups A-G, two secret key exclusively selected... |
| 6141753 |
Secure distribution of digital representations |
| Oct-31-2000 |
Techniques for secure distribution of digital representations that combine encryption and watermarking. When a user at a client desires to download a digital representation, the user makes a request to... |
| 6141752 |
Mechanism for facilitating secure storage and retrieval of information on a smart card by an internet service provider using various network computer client devices |
| Oct-31-2000 |
A network computer client device (NC) maintains a root internet service provider (ISP) certificate which includes the ISP's public key and which is digitally signed by a root authority using the root authority's... |
| 6141423 |
Method for preventing inadvertent betrayal by a trustee of escrowed digital secrets |
| Oct-31-2000 |
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... |
| 6138235 |
Controlling access to services between modular applications |
| Oct-24-2000 |
The present invention provides a method and an apparatus for providing a first computer program module with the ability to access a service from a second computer program module. The method includes receiving... |
| 6134660 |
Method for revoking computer backup files using cryptographic techniques |
| Oct-17-2000 |
A system enables a user to remove a file from a file system and from all backup tapes without ever mounting a single tape. When a file is backed up, it is first encrypted using a randomly generated key... |
| 6134631 |
Non-volatile memory with embedded programmable controller |
| Oct-17-2000 |
Computer systems may be provided with additional performance for demanding applications while adding little additional hardware. For example, a slave device for a host computer system combines an embedded... |
| 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... |
