| 6408388 |
Personal date/time notary device |
| Jun-18-2002 |
A personal data/time notary device is embodied in a token device such as a "smart card". The portable notary device includes an input/output (I/O) port, which is coupled to a single integrated circuit... |
| 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... |
| 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... |
| 6385727 |
Apparatus for providing a secure processing environment |
| May-7-2002 |
An apparatus for providing a secure processing environment is disclosed. In one embodiment, the apparatus includes a read/write memory for storing encrypted information. It also includes a processor, a... |
| 6385316 |
Method and apparatus for encrypting data in a wireless communication system |
| May-7-2002 |
In a communications system, a method of transforming a set of message signals representing a message comprising the steps of first encoding one of the set of message signals in accordance with a first... |
| 6385317 |
Method for providing a secure communication between two devices and application of this method |
| May-7-2002 |
In a method for providing a secure communication between two devices, a first device generates a random key (Ci) and transfers this key to a second device in a first message encrypted using a public key.... |
| 6377689 |
Key transmission system |
| Apr-23-2002 |
A RSA encryption scheme includes a modulus in which at least one set of bits is of a predetermined configuration. The configuration may be selected to replicate the identity of the recipient or other information... |
| 6373949 |
Method for user identity protection |
| Apr-16-2002 |
In the method in accordance with the present invention, the subscriber identifier to be sent to the transmission network is encrypted using a cipher key common to a specific group of subscribers, and a... |
| 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.... |
| 6360321 |
Secure computer system |
| Mar-19-2002 |
A secure computer system including a host computer unit having embedded in a single package, a host CPU, and an authenticating and security controlling computer, a verification unit and a smart card accepting... |
| 6353889 |
Portable device and method for accessing data key actuated devices |
| Mar-5-2002 |
Data key actuated devices such as high security doors are modified so that they periodically transmit an identity pattern. An authorized user is provided with a portable access device storing keys for... |
| 6351813 |
Access control/crypto system |
| Feb-26-2002 |
An access control/crypto system having a smart card reader and an access control program for requesting information from a user to determine if the user is authorized to access the computer. The access... |
| 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... |
| 6334185 |
Method and apparatus for centralized encryption key calculation |
| Dec-25-2001 |
A system and method for encrypting transmissions between a plurality of communication nodes and a mobile station, wherein the algorithm for generating an encryption key resides within a first communications... |
| 6314409 |
System for controlling access and distribution of digital property |
| Nov-6-2001 |
A method and device are provided for controlling access to data. Portions of the data are protected and rules concerning access rights to the data are determined. Access to the protected portions of the... |
| 6304657 |
Data encryption apparatus using odd number of shift-rotations and method |
| Oct-16-2001 |
A data converting unit includes a key adding unit for performing an arithmetic addition modulo 2.sup.32 for input data F and subkey data Ki and outputting the outcome as data G, and a data substituting... |
| 6301362 |
Method and apparatus for cryptographically transforming an input block into an output block |
| Oct-9-2001 |
A method and apparatus for cryptographically transforming an input block into an output block. The input block has a first block size and is partitionable into a plurality of input subblocks having a second... |
| 6292895 |
Public key cryptosystem with roaming user capability |
| Sep-18-2001 |
A public key cryptosystem with roaming user capability within a network that allows secure communication between users of the system, client machines, and encryption servers. A client machine generates... |
| 6269164 |
Method of and system for encrypting messages |
| Jul-31-2001 |
A technique for encrypting and decrypting a data message is described herein and includes a stream cipher, a block cipher and a key generation embodiment which use a process of Summary Reduction. This... |
| 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... |
| 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... |
| 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... |
| 6243469 |
Information transmission method and apparatus |
| Jun-5-2001 |
The present invention provides an information transmission apparatus and method for an information transmission system where encrypted information comprised of a plurality of information units each hierarchically... |
| 6243470 |
Method and apparatus for advanced symmetric key block cipher with variable length key and block |
| Jun-5-2001 |
A method and apparatus for an advanced symmetric key cipher for encryption and decryption, using a block cipher algorithm. Different block sizes and key sizes are supported, and a different sub-key is... |
| 6240188 |
Distributed group key management scheme for secure many-to-many communication |
| May-29-2001 |
A group key management system and method for providing secure many-to-many communication is presented. The system employs a binary distribution tree structure. The binary tree includes a first internal... |
| 6215875 |
Cipher processing system |
| Apr-10-2001 |
A cipher processing apparatus which readily updates a cipher processing circuit for encrypting information communicated through a communication function. A service station side and a user side are connected.... |
| 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... |
| 6205549 |
Encapsulation of public key cryptography standard number 7 into a secured document |
| Mar-20-2001 |
A secured access to data in a portable document format (PDF) file is provided by encapsulating a Public Key Cryptography Standard number 7 (PKCS#7) object having a recipient list into data. `Enveloped... |
| 6192129 |
Method and apparatus for advanced byte-oriented symmetric key block cipher with variable length key and block |
| Feb-20-2001 |
A method and apparatus for an advanced byte-oriented symmetric key cipher for encryption and decryption, using a block cipher algorithm. Different block sizes and key sizes are supported, and a different... |
| 6185304 |
Method and apparatus for a symmetric block cipher using multiple stages |
| Feb-6-2001 |
The present invention provides a technique, system, and computer program for a symmetric key block cipher. Variable block sizes and key sizes are supported, as well as a variable number of rounds. The... |
| 6182219 |
Apparatus and method for authenticating the dispatch and contents of documents |
| Jan-30-2001 |
Apparatus and method for authenticating that a sender has sent certain information via a dispatcher to a recipient is disclosed. The method includes the steps of: (a) providing a set A comprising a plurality... |
| 6178507 |
Data card verification system |
| Jan-23-2001 |
A method for verifying the authenticity of messages exchanged between a pair of correspondents in an electronic conducted over a data transmission system where the correspondents each include respective... |
| 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... |
| 6173057 |
Method of making secure and controlling access to information from a computer platform having a microcomputer |
| Jan-9-2001 |
A method of securing and monitoring access to information from a computer platform. At least one non-rewritable recording medium with information and operating software is produced. Users are authorized... |
| 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... |
| 6157720 |
Method and apparatus for encrypting data |
| Dec-5-2000 |
In the process of compressing and encrypting data, without increase of a processing time, a cipher capability is secured against the latest cryptanalysis such as differential and linear cryptanalyses.... |
| 6154543 |
Public key cryptosystem with roaming user capability |
| Nov-28-2000 |
A public key cryptosystem with roaming user capability within a network that allows secure communication between users of the system, client machines, and encryption servers. A client machine generates... |
| 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... |
| 6144739 |
Computer network protection using cryptographic sealing software agents and objects |
| Nov-7-2000 |
A method and apparatus for protecting software objects from external modification is described. A cryptographic seal protects the object at the object level and also supports secure inter-object communication.... |
| 6137885 |
Method for enabling direct encrypted communication between two terminals of a mobile radio network, and corresponding station and terminal facilities |
| Oct-24-2000 |
A method for enabling encrypted communication to be performed directly in a single hop or merely directly between two terminals of a mobile radio network by satellite and/or of the GSM/DCS type, after... |
| 6128737 |
Method and apparatus for producing a message authentication code in a cipher block chaining operation by using linear combinations of an encryption key |
| Oct-3-2000 |
A cryptographic technique that not only provides fast and extremely secure encryption and decryption but also assures integrity of a ciphertext message. This technique involves, during message encryption:... |
| 6111952 |
Asymmetrical cryptographic communication method and portable object therefore |
| Aug-29-2000 |
The invention relates to an asymmetric cryptographic communication process which establishes a correspondence between a first value (x) represented by n elements (x.sub.1, . . . , x.sub.n) of a ring (A)... |
| 6108421 |
Method and apparatus for data encryption |
| Aug-22-2000 |
A method and apparatus for use in encrypting and decrypting digital communications converting an initial block to final block based on freely selectable control information and secret key information.... |
| 6088456 |
Data encryption technique |
| Jul-11-2000 |
A method of encrypting data is described in which a random variable (6A-6D) is generated in binary digital form. A first set of data (8A-8J) representing a plaintext message in binary digital form is combined... |
| 6084968 |
Security token and method for wireless applications |
| Jul-4-2000 |
Apparatus and a method are described for providing for multiple secure functions in a host or wireless radiotelephone. Access to the functionality of the radiotelephone is provided by means of a smart... |
| 6081600 |
Method and apparatus for signaling privacy in personal communications systems |
| Jun-27-2000 |
A system and method provides signaling privacy for communications between nodes of a communications network (30). Multiple logical links exist between distinct network nodes (38-40, 42, 50-53) of the communication... |
| 6075864 |
Method of establishing secure, digitally signed communications using an encryption key based on a blocking set cryptosystem |
| Jun-13-2000 |
The encryption key based on a blocking set cryptosystem includes knowledge of the blocking set, and ciphers (usually independent) on the blocking set and its complement. In order to decipher, a legitimate... |
| 6065117 |
Systems, methods and computer program products for sharing state information between a stateless server and a stateful client |
| May-16-2000 |
Systems, methods and computer program products for sharing state information between a stateless server and a stateful client are provided. A client request to perform an action on the server is accompanied... |
| 6047070 |
Process for ensuring a securing interface between a telephone with a card and the network in a telephone system |
| Apr-4-2000 |
In the method for dialing only preprogrammed telephone numbers, it is provided that when there is a desire for access or connection, the telephone number is transmitted from the telephone to the card,... |
