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Class Information
Number: 380/42
Name: Cryptography > Communication system using cryptography > Data stream/substitution enciphering
Description: Subject matter which encrypts a message signal composed of a stream of data elements serially and continuously to produce a stream of the corresponding encrypted data elements.










Sub-classes under this class:

Class Number Class Name Patents
380/43 Key sequence signal combined with data signal 403


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8345877 Key management system Jan. 1, 2013
8345865 Block cipher aria substitution apparatus and method Jan. 1, 2013
8345863 Method of countering side-channel attacks on elliptic curve cryptosystem Jan. 1, 2013
8340290 Security method of keyboard input directly controlling the keyboard controller Dec. 25, 2012
8340295 High-speed cryptographic system using chaotic sequences Dec. 25, 2012
8335926 Computer system and biometric authentication apparatus for use in a computer system Dec. 18, 2012
8315386 Method and apparatus for performing VoIP-based communication using bio keys Nov. 20, 2012
8311216 Packet cipher algorithm based encryption processing device Nov. 13, 2012
8311217 Data transmission method and terminal Nov. 13, 2012
8307210 Method and apparatus for secure validation of tokens Nov. 6, 2012
8300812 Methods of scrambling and descrambling units of data Oct. 30, 2012
8295273 Standard telephone equipment (STE) based deployable secure communication system Oct. 23, 2012
8290145 Transition between masked representations of a value during cryptographic calculations Oct. 16, 2012
8284933 Encrypting variable-length passwords to yield fixed-length encrypted passwords Oct. 9, 2012
8280043 System and method for protecting data in a secure system Oct. 2, 2012
8280044 Stream encryption method and encryption system Oct. 2, 2012
8281128 Method and apparatus for encrypting transport stream of multimedia content, and method and apparatus for decrypting transport stream of multimedia content Oct. 2, 2012
8275997 Method of encrypting and transmitting data and system for transmitting encrypted data Sep. 25, 2012
8271805 Methods and apparatus for providing a secure buffer Sep. 18, 2012
8271799 System and method for generating a disguised password based on a real password Sep. 18, 2012
8261055 Information processing apparatus and system and data communication method pertaining to the information processing system Sep. 4, 2012
8255680 Layer-independent security for communication channels Aug. 28, 2012
8233621 Slice-based prioritized secure video streaming Jul. 31, 2012
8229111 Security circuit using at least two finite state machine units and methods using the same Jul. 24, 2012
8223968 Image data verification program recorded on a recording medium, image data verification method, and image data verification system Jul. 17, 2012
8218767 Security system and method for use in network Jul. 10, 2012
8189787 Data transmitting apparatus, data receiving apparatus and data communication apparatus May. 29, 2012
8189786 Encryption system May. 29, 2012
8189776 Method and system for encoding multimedia content based on secure coding schemes using stream cipher May. 29, 2012
8184806 Table masking for resistance to power analysis attacks May. 22, 2012
8184809 Adaptive and progressive audio stream scrambling May. 22, 2012
8180048 Method and system for computational transformation May. 15, 2012
8175267 Communication apparatus, communication system, transmission method, and computer program product May. 8, 2012
8165293 Method and system providing scrambled content Apr. 24, 2012
8160243 System, apparatus, and method for the secure storing of bulk data using one-time pad encryption Apr. 17, 2012
8160253 Method, transponder, and system for rapid data transmission Apr. 17, 2012
8155309 Circuit arrangement with non-volatile memory module and method for en-/decrypting data in the non-volatile memory module Apr. 10, 2012
8155378 Color image or video processing Apr. 10, 2012
8144872 System and method for generating analog-digital mixed chaotic signal, encryption communication method thereof Mar. 27, 2012
8135130 Data encryption apparatus, data converting method, data converting program, recording medium and integrated circuit Mar. 13, 2012
8126139 Partial encryption and full authentication of message blocks Feb. 28, 2012
8117450 System and method for secure data transmission Feb. 14, 2012
8107621 Encrypted file system mechanisms Jan. 31, 2012
8098817 Methods and apparatus for mixing encrypted data with unencrypted data Jan. 17, 2012
8090098 Method of generating message authentication code using stream cipher and authentication/encryption and authentication/decryption methods using stream cipher Jan. 3, 2012
8085933 Cipher for disk encryption Dec. 27, 2011
8077864 Apparatus for computing streamcipher TSC-4 Dec. 13, 2011
8077867 Confidential information processing apparatus, confidential information processing device, and confidential information processing method Dec. 13, 2011
8077868 Mechanism for transport-safe codings for cryptographic use Dec. 13, 2011
8068606 Embedding a secret in a bit string for safeguarding the secret Nov. 29, 2011

1 2 3 4 5 6 7 8 9










 
 
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