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Class Information
Number: 380/255
Name: Cryptography > Communication system using cryptography
Description: Subject matter including cryptographic structure or methods which protect the transmission or reception of information.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6612486 |
Smart card managing system |
Sep. 2, 2003 |
| 6590980 |
Low voltage, low power operational amplifier with rail to rail output |
Jul. 8, 2003 |
| 6578150 |
Block cipher method |
Jun. 10, 2003 |
| 6574609 |
Secure electronic content management system |
Jun. 3, 2003 |
| 6532539 |
Process for controlling access to a domestic network and device implementing the process |
Mar. 11, 2003 |
| 6510515 |
Broadcast service access control |
Jan. 21, 2003 |
| 6507953 |
System and method for interfacing multiple electronic devices |
Jan. 14, 2003 |
| 6505301 |
Authentication for secure devices with limited cryptography |
Jan. 7, 2003 |
| 6490687 |
Login permission with improved security |
Dec. 3, 2002 |
| 6470086 |
Method and apparatus for effecting secure document format conversion |
Oct. 22, 2002 |
| 6470015 |
System and device for preventing wiretap |
Oct. 22, 2002 |
| 6449720 |
Public cryptographic control unit and system therefor |
Sep. 10, 2002 |
| 6446205 |
Cryptosystems with elliptic curves chosen by users |
Sep. 3, 2002 |
| 6434699 |
Encryption processor with shared memory interconnect |
Aug. 13, 2002 |
| 6418224 |
Methods and apparatus for self-inverting multiple-iteration CMEA crypto-processing for improved security for wireless telephone messages |
Jul. 9, 2002 |
| 6418466 |
Management of authentication discovery policy in a computer network |
Jul. 9, 2002 |
| 6415032 |
Encryption technique using stream cipher and block cipher |
Jul. 2, 2002 |
| 6400823 |
Securely generating a computer system password by utilizing an external encryption algorithm |
Jun. 4, 2002 |
| 6393563 |
Temporary digital signature method and system |
May. 21, 2002 |
| 6378070 |
Secure printing |
Apr. 23, 2002 |
| 6378069 |
Apparatus and methods for providing software updates to devices in a communication network |
Apr. 23, 2002 |
| 6373950 |
System, method and article of manufacture for transmitting messages within messages utilizing an extensible, flexible architecture |
Apr. 16, 2002 |
| 6367011 |
Personalization of smart cards |
Apr. 2, 2002 |
| 6363427 |
Method and apparatus for a bulletin board system |
Mar. 26, 2002 |
| 6363152 |
Hybrid one time pad encryption and decryption apparatus with methods for encrypting and decrypting data |
Mar. 26, 2002 |
| 6360322 |
Automatic recovery of forgotten passwords |
Mar. 19, 2002 |
| 6353886 |
Method and system for secure network policy implementation |
Mar. 5, 2002 |
| 6353889 |
Portable device and method for accessing data key actuated devices |
Mar. 5, 2002 |
| 6351536 |
Encryption network system and method |
Feb. 26, 2002 |
| 6345101 |
Cryptographic method and apparatus for data communication and storage |
Feb. 5, 2002 |
| 6338140 |
Method and system for validating subscriber identities in a communications network |
Jan. 8, 2002 |
| 6337910 |
Method and apparatus for generating one time pads simultaneously in separate encryption/decryption systems |
Jan. 8, 2002 |
| 6334189 |
Use of pseudocode to protect software from unauthorized use |
Dec. 25, 2001 |
| 6320966 |
Cryptographic methods for demonstrating satisfiable formulas from propositional logic |
Nov. 20, 2001 |
| 6311270 |
Method and apparatus for securing communication utilizing a security processor |
Oct. 30, 2001 |
| 6311214 |
Linking of computers based on optical sensing of digital data |
Oct. 30, 2001 |
| 6308268 |
Portable electronic device for safe communication system, and method for initializing its parameters |
Oct. 23, 2001 |
| 6301658 |
Method and system for authenticating digital certificates issued by an authentication hierarchy |
Oct. 9, 2001 |
| 6297891 |
Method & system for electronic document certification |
Oct. 2, 2001 |
| 6292895 |
Public key cryptosystem with roaming user capability |
Sep. 18, 2001 |
| 6292892 |
Apparatus and method for providing secured communications |
Sep. 18, 2001 |
| 6292569 |
Systems and methods using cryptography to protect secure computing environments |
Sep. 18, 2001 |
| 6286103 |
Method and apparatus for encrypted data stream transmission |
Sep. 4, 2001 |
| 6275587 |
Secure data encoder and decoder |
Aug. 14, 2001 |
| 6275588 |
Apparatus and method for performing and controlling encryption/decryption for data to be transmitted on local area network |
Aug. 14, 2001 |
| 6269164 |
Method of and system for encrypting messages |
Jul. 31, 2001 |
| 6266416 |
Protection of software against use without permit |
Jul. 24, 2001 |
| 6266417 |
Cryptographic communication process and apparatus |
Jul. 24, 2001 |
| 6263444 |
Network unauthorized access analysis method, network unauthorized access analysis apparatus utilizing the method, and computer-readable recording medium having network unauthorized access anal |
Jul. 17, 2001 |
| 6263438 |
Method and apparatus for secure document timestamping |
Jul. 17, 2001 |
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