SHA256的硬件实现

SHA256

的加密原理，即如何将一个长度小于

2

64

的原文经过

SHA256

算法形成一个具有高碰撞能力的，不可逆性的长度固定为

256bi ts

的摘要。

3.

< br>本次实现

SHA

加密系统的构架介绍，实现流程和仿真结 果。

关键词：信息安全；硬件仿真；

sha-256

；

Abstract

With the rapid development of social informatization, information security

I

山东科技大学本科毕业设计（论文）

has become the focus of attention. Data digest algorithm, which is an important

component of hash algorithm, plays an important role in information protection.

SHA-256 algorithm is the realization of the hash algorithm in function belongs

to a kind of good, compared to the information generated in the commonly used

MD5,

SHA1

has

anti

collision

ability,

the

irreversibility

of

the

higher,

in

the

transmission

of

information,

combined

with

other

encryption

technology,

can

ensure

information

integrity

and

non

repudiation.

At

the

same

time,

the

hardware implementation of SHA-256 algorithm is faster and more aggressive

than the software main work of this paper is:

FIPSI80-2in

SHA256

based

on

Modelsim

simulation

software,

some

unique

characteristics

combined

with

the

hardware

programming

language,

written by Verilog SHA256 hash encryption algorithm.

The main content of this paper:

1., including the background and significance of SHA256, the hash algorithm,

the introduction of SHA series and the advantages of hardware implementation

algorithm.

2.

introduce

the

encryption

principle

of

SHA256,

that

is,

how

to

make

a

text

with a length less than 264 and pass the SHA256 algorithm to form a summary

of 256bits with high collision ability and irreversible length.

3., the implementation of the SHA encryption system framework, the realization

of the flow and simulation results

Key

word

：

information safety

；

Hard ware simulation< /p>

；

SHA-256

II

山东科技大学本科毕业设计（论文）

目录

摘要

.................................................. ............................................ I

Abstract .............................. .................................................. ........ I

第一章

绪论

.

.. .................................................. ........................... 1

1.1

研究意义

.

.................................... .................................................. ..........

1

1.2

研究背景

.

.................................... .................................................. ..........

1

1.3

本文主要内容及章节安排

.

............................. .......................................

4

第二章

哈希算法简介

.

................................................ ................ 5

2.1

哈希算法的特点

.

................................. .................................................. .

5

2.2

安全哈希标准

.

.................................. .................................................. ....

7

2.3

算法实现方式及选择硬件仿真的原因

.

...................................... .........

8

第三章

SHA256

算法的原理与实现

............................................ 9

3.1 SHA246

哈希函数

.. .................................................. ...............................

9

3.2 SHA256

具体函数介绍

............... .................................................. ..........

9

3.3 SHA256

的算法描述

................ .................................................. ...........

1

0

3.3.1

附加填充比特及附加长度值

................................

10

3.3.2

初始化缓存以及数据块扩展

................................

12

3.3.3

处理

512bits

报文的循环迭代运算

...........................

13

第四章

SHA256

加密系统硬件设计与实现

.

........................... ... 16

4.1

算法的总体架构

.

< br>............................................... ..................................

1

6

4.1.1

数据计算模块

.......... ..................................

17

4.1.2 extension

数据延展模块

...................................

19

4.1.3

前端数据处理及迭代运算操作模块

..........................

20

4.2

实现流程

< br>.

................................... .................................................. ........

2

3

4.2.1

参数初始化、填充比特值以及附加长度值

....................

23

4.2.2

初始化缓存、原文延展及

64

次迭代运算

.....................

24

4.3

仿真结果

.

.................................... .................................................. ........

2

5

第五章

总结与期望

...................... ............................................ 27

5.1

总结

.

...................................... .................................................. ..............

2

7

III

山东科技大学本科毕业设计（论文）

5.2

展望

.

...................................... .................................................. ..............

2

7

参考文献

....................... .................................................. .......... 28

附录：

.......... .................................................. ............................. 1

致谢

......................... .................................................. .................. 5

IV

山东科技大学本科毕业设计（论文）

第一章

绪论

1.1

研究意义

由于国家现代化建设的高速发展

，由 于电脑，手机，

internet

的广泛普

及，它们正在不断的影响着每个人的生活方式和节奏。论坛，邮箱，贴吧

,