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Device for encoding and decoding cipher

A coding, decoding and ciphering technology, which is applied in coding/decoding devices, encryption devices with shift registers/memory, instruments, etc., can solve problems such as reducing the efficiency of the encryption and decryption process, and achieve the effect of improving efficiency

Active Publication Date: 2007-12-26
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the known RC4 technology can only process one byte of data at a time, reducing the efficiency of the encryption and decryption process

Method used

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  • Device for encoding and decoding cipher
  • Device for encoding and decoding cipher
  • Device for encoding and decoding cipher

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Experimental program
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Embodiment Construction

[0015] FIG. 1 shows a schematic diagram of a network architecture for applying a multi-byte-based cryptographic system according to an embodiment of the present invention. In a preferred case, this network architecture includes an encoder 110 and a decoder 130. Wherein, the encoder 110 and the decoder 130 can be connected to each other in a wired-connection, wireless or hybrid physical connection and wireless manner. Those skilled in the art understand that the connection between the encoder 110 and the decoder 130 may require multiple intermediary nodes, such as wireless access points, base stations, hubs, and bridges. (bridge), router (router) or other intermediate nodes used to process network communication. Before transmitting the data stream D to the network, the encoder 110 uses a multi-byte-based cryptographic system to process the data stream D into an encoded data stream D', and then transfers the encoded data stream D 'Transmit to the decoder 130 through the network to p...

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Abstract

A method for coding and decoding cipher includes fetching data of the first and second keys as well as data values of the first and the second addresses, calculating out the first and the second as well as the third intermediate operation values by utilizing the first and the second keys data as well as the first and the second address data values, deciding out an exchange mode to indicate replace relation, selectively exchange data values of the first and the second addresses as well as data values in addresses represented by three said intermediate operation values according to decided exchange mode.

Description

Technical field [0001] This invention is related to cryptosystems, especially an encoding and decoding device using a multibyte-based cryptosystem. Background technique [0002] In cryptography, RC4 (or ARC4) is a widely used software streaming cipher, and is used in common communication protocols, such as SSL (SecureSockets Layer) and WEP, to ensure Internet transmission or wireless Security of network transmission. However, the known RC4 technology can only process one byte of data at a time, which reduces the efficiency of the encryption and decryption process. Summary of the invention [0003] In view of this, there is a need for an encoding and decoding device using a multibyte-based cryptographic system to improve the efficiency of the encryption and decryption process. [0004] The present invention provides a cryptographic encoding and decoding device, which includes: a key temporary memory; an even byte memory; an odd byte memory; a data reading unit; an arithmetic unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09C1/00H04L9/06
Inventor 郭宏益
Owner VIA TECH INC