| 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... |
| 6209099 |
Secure data processing method and system |
| Mar-27-2001 |
The present invention concerns a secure data processing method and system in which the user or operator of the system can trust that all of the software and hardware components of the system have been... |
| 6175924 |
Method and apparatus for protecting application data in secure storage areas |
| Jan-16-2001 |
A method, apparatus and computer program product are disclosed for certifying the authenticity of an application program and for securely associating certified application programs whose certification... |
| 6161183 |
Data verifying method apparatus for creating data to be verified and data verifying apparatus |
| Dec-12-2000 |
A token 12 creates utilization history information and sends the information to an information processing unit 11 and simultaneously creates an verification value and stores the value in a utilization-value... |
| 6148405 |
Method and system for secure lightweight transactions in wireless data networks |
| Nov-14-2000 |
The present invention is a method and system for establishing an authenticated and secure communication session for transactions between a server and a client in a wireless data network that generally... |
| 6141422 |
Secure cryptographic multi-exponentiation method and coprocessor subsystem |
| Oct-31-2000 |
A system for performing high speed exponentiation in a secure environment. The system includes an interface for receiving encrypted data sent from a host system, a plurality of exponentiators capable of... |
| 6118874 |
Encrypted data recovery method using split storage key and system thereof |
| Sep-12-2000 |
When a secret is encrypted and stored, it is necessary to provide a countermeasure for the situation where a key is lost (key recovery system). In the present invention, a key recovery system for an enveloped... |
| 6084969 |
Key encryption system and method, pager unit, and pager proxy for a two-way alphanumeric pager network |
| Jul-4-2000 |
A method and system allows encryption services can be added to an existing wireless two-way alphanumeric pager network by providing a pager proxy which is arranged to receive an encrypted message from... |
| 6081893 |
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-27-2000 |
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... |
| 6072876 |
Method and system for depositing private key used in RSA cryptosystem |
| Jun-6-2000 |
A scheme for depositing a private key used in the RSA cryptosystem which is capable of maintaining the private key more safely, without requiring a user to always carry around a storage medium. In this... |
| 6061790 |
Network computer system with remote user data encipher methodology |
| May-9-2000 |
Computer-implemented methodology is described which allows any user to access a "network client" machine (e.g., PC, ATM machine, cell phone, or the like) which is connected to a network but which does... |
| 6061448 |
Method and system for dynamic server document encryption |
| May-9-2000 |
A method and system are provided for secure document delivery over a wide area network, such as the Internet. A sender directs a Delivery Server to retrieve an intended recipient's public key. The Delivery... |
| 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... |
| 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... |
| 6044154 |
Remote generated, device identifier key for use with a dual-key reflexive encryption security system |
| Mar-28-2000 |
A security system is disclosed, which system is for granting access to a host computer in response to a demand from a remote computer. The security system has a permanent encryption key mounted on the... |
| 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... |
| 6028933 |
Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network |
| Feb-22-2000 |
The specification relates to the encryption of data transmitted over a broadband multiple access bi-directional hybrid fiber/coax (HFC) network. The method supports downstream broadcast encryption from... |
| 6009173 |
Encryption and decryption method and apparatus |
| Dec-28-1999 |
A method for efficient encryption and decryption (100) comprises the steps of encrypting a message (104) at a sending unit which is to be sent to a receiving unit using a message key (106) and appending... |
| 6005938 |
Preventing replay attacks on digital information distributed by network service providers |
| Dec-21-1999 |
A technique for preventing replay attacks on digital information distributed by network service providers. At the beginning of a subscription period for a service, a network service provider sends entitlement... |
| 6002768 |
Distributed registration and key distribution system and method |
| Dec-14-1999 |
An online conference session management system includes computer sites associated with a conference session holder, a plurality of service providers and a plurality of conference session participants.... |
| 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... |
| 5987124 |
Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| Nov-16-1999 |
A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext block... |
| 5978482 |
Method and system for protection of digital information |
| Nov-2-1999 |
An information processing system including an encryption processing logic module and a decryption processing logic module for enabling the encryption of digital information to be decrypted with a decryption... |
| 5970147 |
System and method for configuring and registering a cryptographic device |
| Oct-19-1999 |
A system and method for configuring and registering a cryptographic device. The configuration phase involves loading a device serial number (DSER) and a symmetric key (SK) into non-volatile memory of the... |
| 5956406 |
Method of setting up secure communications and associated encryption/decryption system |
| Sep-21-1999 |
A method of establishing secure communication between users by means of a public key encryption/decryption system comprises the following steps: a center generates a pair of keys comprising a secret key... |
| 5930362 |
Generation of encryption key |
| Jul-27-1999 |
A set of Diffie-Hellman data encryption values is generated prior to receiving a request for the data encryption values. The data encryption values are then stored in a database. The generating and storing... |
| 5892899 |
Tamper resistant methods and apparatus |
| Apr-6-1999 |
In accordance with a first aspect of the present invention, a security sensitive program that operates with a secret is made tamper resistant by distributing the secret in space as well as in time. In... |
| 5872846 |
System and method for providing security in data communication systems |
| Feb-16-1999 |
A system and method for providing security in data communication systems where multiple users are coupled to a common receiving system. The data is encrypted or otherwise encoded by a sender using a key.... |
| 5870475 |
Facilitating secure communications in a distribution network |
| Feb-9-1999 |
In a hybrid fiber-coax distribution network, communications between a central station and particular end stations are encrypted using a working key (WK) of a symmetric encryption scheme. The central station... |
| 5870470 |
Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| Feb-9-1999 |
A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext block... |
| 5838792 |
Computer system for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem |
| Nov-17-1998 |
An article of manufacture for effecting secure communications during a communications session between users in a secured communication cryptosystem in which users are each associated with a public crypto-key... |
| 5825890 |
Secure socket layer application program apparatus and method |
| Oct-20-1998 |
A computer program product comprising: a computer useable medium having computer readable program code means embodied therein for encrypting and decrypting information transferred over a network between... |
| 5812671 |
Cryptographic communication system |
| Sep-22-1998 |
In this system parties have network access to a network secure communications gateway which stores the current encryption/decryption algorithms and keys for parties registered with the network secure communications... |
| 5809144 |
Method and apparatus for purchasing and delivering digital goods over a network |
| Sep-15-1998 |
A method for purchasing and delivering goods over a network is comprised of the steps of identifying a digital good to be purchased. A purchase price for the digital good is negotiated. After the negotiation... |
| 5784463 |
Token distribution, registration, and dynamic configuration of user entitlement for an application level security system and method |
| Jul-21-1998 |
A shared secret key distribution system which enables secure on-line registration for services provided by an application server through an application level security system or firewall utilizes an authentication... |
| 5761306 |
Key replacement in a public key cryptosystem |
| Jun-2-1998 |
Improved key management is provided by a public key replacement apparatus and method for operating over insecure networks. An active public key and the mask of a replacement public key are provided by... |
| 5748735 |
Securing E-mail communications and encrypted file storage using yaksha split private key asymmetric cryptography |
| May-5-1998 |
A method is provided for securing stored files in a system having a plurality of system users with each system user having an associated asymmetric crypto-key with a public key portion and a corresponding... |
| 5737416 |
Method and apparatus for enabling trial period use of software products: method and apparatus for utilizing a decryption stub |
| Apr-7-1998 |
A method and apparatus is provided in a data processing system for securing access to particular files which are stored in a computer-accessible memory media. A file management program is provided as an... |
| 5734720 |
System and method for providing digital communications between a head end and a set top terminal |
| Mar-31-1998 |
A system and method for scheduling the receipt of desired movies and other forms of data from a network. Feedback paths are provided so that customer's profiles and/or the profiles of the video programs... |
| 5701343 |
Method and system for digital information protection |
| Dec-23-1997 |
A digital information protection scheme using an improved security protocol. In a system in which a user makes an access to a digital information provided by an information center by connecting a computer... |
| 5661806 |
Process of combined authentication of a telecommunication terminal and of a user module |
| Aug-26-1997 |
The terminal and the user module are authenticated in a combined manner on the basis of an authentication key calculated on the one hand by the terminal and on the other hand by the network. A session... |
| 5651066 |
Cipher key distribution system effectively preventing illegitimate use and charging of enciphered information |
| Jul-22-1997 |
A method and a system for cipher key distribution realizing an effective prevention of the illegitimate use and the illegitimate charging. A key request signal containing a first random number generated... |
| 5625690 |
Software pay per use system |
| Apr-29-1997 |
A pay per use system for of the unauthorized use of computer software. An encryption program encodes original software to produce secured software. The encoding is accomplished by using cryptographic techniques.... |
| 5557678 |
System and method for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem |
| Sep-17-1996 |
A encryption method and system using split key public encryption. A first and second user private encryption key and a corresponding first and second user public encryption key are generated. The first... |
| 5517567 |
Key distribution system |
| May-14-1996 |
A system for securely distributing a communications key from a master unit to a remote unit for use in cryptographic communications between the master and remote units employs first and second secret numbers... |
| 5509071 |
Electronic proof of receipt |
| Apr-16-1996 |
A system for use in an electronic cryptosystem for providing a sender with electronic proof of receipt by an intended recipient of an electronic artifact is disclosed. The process is initiated by the recipient's... |
| 5455863 |
Method and apparatus for efficient real-time authentication and encryption in a communication system |
| Oct-3-1995 |
Radio frequency based cellular telecommunication systems often require both subscriber units and communication units of a fixed network communication system to maintain secret data which may be used to... |
| 5325433 |
Encryption communication system |
| Jun-28-1994 |
An encryption communication system including: a communication center having at least a key information generating unit for generating key generating information used for encryption communication; and a... |
| 5265164 |
Cryptographic facility environment backup/restore and replication in a public key cryptosystem |
| Nov-23-1993 |
A computer apparatus, program and method function in a data processing system to replicate a cryptographic facility. The system includes a first cryptographic facility containing a portable part which... |
| 5251258 |
Key distribution system for distributing a cipher key between two subsystems by one-way communication |
| Oct-5-1993 |
In a key distribution system comprising a first subsystem (11), a second subsystem (12), and a public file (13), the first subsystem transmits distribution information (ID.sub.A, Y.sub.A) to the second... |
