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Shifting module of reconfigurable cipher code coprocessor

A cryptographic coprocessor and shift circuit technology, applied in the field of information security, can solve the problems of poor flexibility of special cryptographic chips and limited application scope, etc.

Inactive Publication Date: 2004-12-29
HISENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flexibility of a dedicated cryptographic chip for a specific algorithm is extremely poor, and it can only be adapted to one algorithm, which greatly limits its application range

Method used

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  • Shifting module of reconfigurable cipher code coprocessor
  • Shifting module of reconfigurable cipher code coprocessor
  • Shifting module of reconfigurable cipher code coprocessor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. A shift module of a reconfigurable cryptographic coprocessor, as shown in FIG. 2 . This is a 128-bit shift module. It includes a shift circuit (1) with shift mode SF, shift direction DIR, and shift number SB as control signals, D[127:0] as input, and Q[127:0] as output.

Embodiment 2

[0027] Example 2. A shift module of a reconfigurable cryptographic coprocessor, as shown in FIGS. 3 to 6 . It includes a shift circuit with shift mode SF, shift direction DIR, and shift number SB as control signals, D[15:0] as input, and Q[15:0] as output.

[0028] See Figure 5, the shift circuit includes n multiplexers (2) with D[15:0] as the input and SB as the control signal, and the outputs of the two multiplexers (2) as the input 1. Take DIR as the n two select one selectors (3) of control signal, produce the output (4) phase AND gate ( 5), with the output of n two select one selector (3) and the output of AND gate (5) as input, take SF as the two select one select selector (6) of control signal, with this two select one select The output of passer (6) is input to latch (7) controlled by clock signal CLK.

[0029] The following takes the 16-bit shift unit as an example to illustrate the design principle of the shift unit.

[0030] Let D be the input data of the 16-bit...

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Abstract

A shifting module for reconfiguration cipher code coprocessor comprises designing a shifting circuit which employs shifting format SF, shifting direction DIR and shifting digit SB as control signal, D[n-1:0] as input, Q[n-1:0] as output, wherein the shifting circuit comprises n multipath selectors, n 2-for-1 selectors, an AND gate and a latching device.

Description

technical field [0001] The invention belongs to the design technology of a reconfigurable cryptographic coprocessor chip used in the field of information security, and more specifically relates to the improvement of a shift module of a reconfigurable cryptographic coprocessor. Background technique [0002] One of the most basic and most effective measures to ensure information security is to perform cryptographic transformation on information. The cryptographic chip is the core basic component of the cryptographic system. For a special encryption chip, since the hardware circuit structure is designed for a specific encryption / decryption algorithm, the algorithm and the hardware circuit structure can match very well, so that the encryption / decryption speed of the special encryption chip is very fast. However, the flexibility of a dedicated cryptographic chip for a specific algorithm is extremely poor, and it can only be adapted to one algorithm, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06
Inventor 刘志恒曲英杰丁勇何云鹏陈永强张世友
Owner HISENSE