| 6105133 |
Bilateral authentication and encryption system |
| Aug-15-2000 |
A bilateral system for authenticating remote transceiving stations through use of station identifiers (IDs), and through use of passwords which are used only one time, and thereafter exchanging messages... |
| 6094487 |
Apparatus and method for encryption key generation |
| Jul-25-2000 |
An encryption key generation system generates encryption keys at both an originating terminal and a terminating terminal of a wireless network. A central controller generates a shared secret based on the... |
| 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... |
| 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... |
| 6064741 |
Method for the computer-aided exchange of cryptographic keys between a user computer unit U and a network computer unit N |
| May-16-2000 |
The method is for the exchange of cryptographic keys, in which the length of the transmitted messages is significantly reduced and the security properties of the method are considerably increased in comparison... |
| 6061796 |
Multi-access virtual private network |
| May-9-2000 |
A virtual private network for communicating between a server and clients over an open network uses an applications level encryption and mutual authentication program and at least one shim positioned above... |
| 6061791 |
Initial secret key establishment including facilities for verification of identity |
| May-9-2000 |
An issuer offers any type of service secured with a secret cryptographic key assigned to an applicant according to the present invention, which includes a secret key registration process. Usually, the... |
| 6058477 |
System and method for authentication, and device and method for authentication |
| May-2-2000 |
In authentication using a plurality of cipher keys, the authentication time is shortened. In the case that an encipher key to encipher key are required to take an access to each area out of the area to... |
| 6058476 |
Encryption apparatus for ensuring security in communication between devices |
| May-2-2000 |
In the first devices, MPU 53 generates random number R1 as challenge data. Random number R3 is generated by first encryption IC 54, and then combined with random number R1, encrypted, and sent to second... |
| 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... |
| 6049873 |
Scrambled information transmitting and receiving method |
| Apr-11-2000 |
A service information receiving apparatus (1) for receiving scrambled charged service information transmitted as being multiplexed on an FM broadcast radio wave from an FM broadcasting station (3) causes... |
| 6047242 |
Computer system for protecting software and a method for protecting software |
| Apr-4-2000 |
A method for protecting an item of software, wherein at least one first challenge means is associated with said protected item of software, and at least one first response means accesses one private keying... |
| 6047072 |
Method for secure key distribution over a nonsecure communications network |
| Apr-4-2000 |
In response to an inquiry by an unsophisticated Subscriber over a nonsecure network, a Provider returns a public key and retains the corresponding private key. The Subscriber encrypts a password using... |
| 6041408 |
Key distribution method and system in secure broadcast communication |
| Mar-21-2000 |
A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center... |
| 6032258 |
Apparatus and methods for transmission security in a computer network |
| Feb-29-2000 |
A method for validating a message packet communicated from a source node to a destination node in a computer network is disclosed. The source node and destination node have access to a clock mechanism... |
| 6028935 |
Cryptographic receiver |
| Feb-22-2000 |
A cryptographic receiver (10) includes photon detectors (52, 54, 56, 58) arranged to detect photons arriving from filters (22) and (24). A fiber coupler (14) randomly distributes each received photon (16)... |
| 6021203 |
Coercion resistant one-time-pad cryptosystem that facilitates transmission of messages having different levels of security |
| Feb-1-2000 |
A protocol is provided for transmitting low security messages and high security messages with one-time-pad cryptosystem. In one implementation of the present invention, low security messages are encrypted... |
| 6018581 |
Communication system and communication method |
| Jan-25-2000 |
A communication system can maintain high security in communication between a communication apparatus and a terminal. The communication system includes the communication apparatus and the terminal provided... |
| 6018582 |
Optical transmission system implementing encrypting by deterministic chaos |
| Jan-25-2000 |
The invention relates to an optical transmission system that implements encrypting of an information carrying signal by deterministic chaos. The system includes a transmitter (1), a receiver (4), and one... |
| 6009174 |
Secret key transfer method which is highly secure and can restrict the damage caused when the secret key is leaked or decoded |
| Dec-28-1999 |
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... |
| 6002770 |
Method for secure data transmission between remote stations |
| Dec-14-1999 |
A method for permitting the secure handling of data between two remote stations firstly involves the generation of an encrypted decryption key which is based on a fingerprint information signal from a... |
| 5999285 |
Positive-operator-valued-measure receiver for quantum cryptography |
| Dec-7-1999 |
Quantum key distribution (QKD) employs non-orthogonal quantum states to distribute a random bit sequence between two users for use as a provably secure key for encryption and authentication. The key generation... |
| 5995624 |
Bilateral authentication and information encryption token system and method |
| Nov-30-1999 |
An authentication and information encryption system and method which uses a token system for increased security in accommodating bilateral encrypted communications between an originating system and an... |
| 5987131 |
Cryptographic key exchange using pre-computation |
| Nov-16-1999 |
A public-key method of cryptographic key exchange using modular exponentiation in which memory, for storing pre-computed results, can be flexibly traded off against the computational complexity of key-exchange.... |
| 5987130 |
Simiplified secure swift cryptographic key exchange |
| Nov-16-1999 |
A first of two cryptographic units establish a cryptographic key "K" by initially selecting a first quantity "A", and computes second and third quantities "B"=.PHI..sub.1 (A) and "C"=.PHI..sub.2 (A). It... |
| 5966444 |
Method and system for establishing a cryptographic key agreement using linear protocols |
| Oct-12-1999 |
A method for establishing key agreement between two communicating parties using a general linear protocol in finite and infinite dimensional spaces. Two topological linear spaces, in particular Euclidean... |
| 5966224 |
Secure communications with low-orbit spacecraft using quantum cryptography |
| Oct-12-1999 |
Apparatus and method for secure communication between an earth station and spacecraft. A laser outputs single pulses that are split into preceding bright pulses and delayed attenuated pulses, and polarized.... |
| 5960086 |
Unified end-to-end security methods and systems for operating on insecure networks |
| Sep-28-1999 |
Secure transmission of a message is achieved by using a one-time encryption key derived at the receiver and the sender from information present at both the sender and the receiver, but wherein the information... |
| 5956402 |
Passwordless secure and efficient remote data update |
| Sep-21-1999 |
Secure communication is effected when computers A and B that are interconnected by an insecure medium employ a dataset that is known to both and that is otherwise used within one or other of the computers... |
| 5953421 |
Quantum cryptography |
| Sep-14-1999 |
In a method of communication using quantum cryptography, single-photon signals from a highly attenuated source are modulated and subsequently detected. In the step of detecting the modulated signal, the... |
| 5909491 |
Method for sending a secure message in a telecommunications system |
| Jun-1-1999 |
A method for sending a secure message in a telecommunications system using public encryption keys. A sending transceiver encrypts the message c using the sender's own public encryption key Ex to generate... |
| 5872847 |
Using trusted associations to establish trust in a computer network |
| Feb-16-1999 |
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 determining... |
| 5864625 |
Methods and apparatus for secure optical communications links |
| Jan-26-1999 |
Methods and apparatus for providing a secure optical communications link are disclosed. Communications information is encrypted with a security key. An optical beam is then modulated with both the security... |
| 5850441 |
System and method for key distribution using quantum cryptography |
| Dec-15-1998 |
A method of communication based on quantum cryptography is modified to include an initial step of outputting from, e.g., a transmitter, a single-photon signal, which may be unmodulated. A receiver then... |
| 5848156 |
Communication method and apparatus for carrying out cipher communications telephonically |
| Dec-8-1998 |
A communication method that can easily carry out cipher communication. At the caller, a secret key is produced based on data including the caller's own telephone number and the telephone number of the... |
| 5841864 |
Apparatus and method for authentication and session key exchange in a communication system |
| Nov-24-1998 |
The apparatus (101, 110) and method for authentication is provided by generating R and encrypting it using a selected algorithm K as the key in a primary station, encrypting the verification key, V using... |
| 5832087 |
Apparatus for generating encryption/decryption look-up tables using a session key |
| Nov-3-1998 |
An encryption/decryption apparatus enables encrypted communication between two stations each incorporating such an apparatus. The apparatus is arranged to generate a set of look-up tables in accordance... |
| 5787173 |
Cryptographic key management method and apparatus |
| Jul-28-1998 |
A system for the secure communication of a message from a transmitting user to a receiving user using a split key scheme. Each user generates a key component using a cryptographic engine. The key component... |
| 5764768 |
Blind encryption |
| Jun-9-1998 |
A method of processing encrypted communications sent by a first party, the method including the steps of: receiving from the first party a message that has a first part, a second part, a third part and... |
| 5764765 |
Method for key distribution using quantum cryptography |
| Jun-9-1998 |
In a communication system using quantum cryptography for the distribution of a key, two stations each independently modulate a single-photon signal. The single-photon signal is transmitted to the two stations... |
| 5764766 |
System and method for generation of one-time encryption keys for data communications and a computer program product for implementing the same |
| Jun-9-1998 |
A system and method and computer program product for encrypting data communications comprising the generation of a salt at a data transmitting system and combination of the salt with a primary encryption... |
| 5757924 |
Network security device which performs MAC address translation without affecting the IP address |
| May-26-1998 |
A network security device is connected between a protected client and a network. The network security device negotiates a session key with any other protected client. Then, all communications between the... |
| 5757912 |
System and method for quantum cryptography |
| May-26-1998 |
In a method of communication using quantum cryptography an encryption alphabet is used for coding signals for transmission on a quantum channel. The encryption alphabet comprises pairs of operators applied... |
| 5745578 |
Apparatus and method for secure communication based on channel characteristics |
| Apr-28-1998 |
A method and an apparatus for establishing a key sequence for secure communication through a communication channel between a first transceiver and a second transceiver. Each transceiver transmits to the... |
| 5720034 |
Method for secure key production |
| Feb-17-1998 |
A method for exchanging a secure slave key between an agent and a manager which are connected by an unsecured digital computer network. A master key is provided, which is known to both the manager and... |
| 5706348 |
Use of marker packets for synchronization of encryption/decryption keys in a data communication network |
| Jan-6-1998 |
To enhance the security provided by data encryption in a data communication network, encryption/decryption keys are changed periodically at the source and destination nodes for an established connection.... |
| 5703949 |
Method for establishing secure communications among processing devices |
| Dec-30-1997 |
A system for open electronic commerce having a customer trusted agent securely communicating with a first money module, and a merchant trusted agent securely communicating with a second money module. Both... |
| 5675648 |
System and method for key distribution using quantum cryptography |
| Oct-7-1997 |
A method of communication uses quantum cryptography to encode and decode a signal. A key is distributed on a quantum channel, and information subsequent communicated between the transmitter and receiver... |
| 5638450 |
Method and apparatus for establishing two way communications between a pager device and a paging service provider |
| Jun-10-1997 |
A two way communications path is established between a pager device and a paging service provider. The pager device generates a control command for the paging service provider, converts the control command... |
| 5638445 |
Blind encryption |
| Jun-10-1997 |
A method of processing encrypted communications sent by a first party, the method including the steps of: receiving from the first party a message that has a first part, a second part, a third part and... |
