AES加密算法+源代码+加密标准资源-CSDN文库

共5个文件

c：1个

pdf：1个

zip：1个

AES

4星 · 超过85%的资源需积分: 12 163 浏览量 2009-11-30 12:47:20 上传评论收藏 588KB RAR 举报

资源推荐

资源详情

资源评论

收起资源包目录

AES加密算法.rar （5个子文件）

AES加密算法

AES Source Code

aes.c 27KB

aes.h 500B

关于AES的加密与解密(HDL的实现过程).rar 323KB

关于AES的加密与解密(HDL的实现过程)原代码.zip 18KB

AES加密标准.pdf 273KB

Federal Information

Processing Standards Publication 197

November 26, 2001

Announcing the

ADVANCED ENCRYPTION STANDARD (AES)

Federal Information Processing Standards Publications (FIPS PUBS) are issued by the National

Institute of Standards and Technology (NIST) after approval by the Secretary of Commerce

pursuant to Section 5131 of the Information Technology Management Reform Act of 1996

(Public Law 104-106) and the Computer Security Act of 1987 (Public Law 100-235).

1. Name of Standard. Advanced Encryption Standard (AES) (FIPS PUB 197).

2. Category of Standard. Computer Security Standard, Cryptography.

3. Explanation. The Advanced Encryption Standard (AES) specifies a FIPS-approved

cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a

symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information.

Encryption converts data to an unintelligible form called ciphertext; decrypting the ciphertext

converts the data back into its original form, called plaintext.

The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt

and decrypt data in blocks of 128 bits.

4. Approving Authority. Secretary of Commerce.

5. Maintenance Agency. Department of Commerce, National Institute of Standards and

Technology, Information Technology Laboratory (ITL).

6. Applicability. This standard may be used by Federal departments and agencies when an

agency determines that sensitive (unclassified) information (as defined in P. L. 100-235) requires

cryptographic protection.

Other FIPS-approved cryptographic algorithms may be used in addition to, or in lieu of, this

standard. Federal agencies or departments that use cryptographic devices for protecting classified

information can use those devices for protecting sensitive (unclassified) information in lieu of

this standard.

In addition, this standard may be adopted and used by non-Federal Government organizations.

Such use is encouraged when it provides the desired security for commercial and private

organizations.

7. Specifications. Federal Information Processing Standard (FIPS) 197, Advanced

Encryption Standard (AES) (affixed).

8. Implementations. The algorithm specified in this standard may be implemented in

software, firmware, hardware, or any combination thereof. The specific implementation may

depend on several factors such as the application, the environment, the technology used, etc. The

algorithm shall be used in conjunction with a FIPS approved or NIST recommended mode of

operation. Object Identifiers (OIDs) and any associated parameters for AES used in these modes

are available at the Computer Security Objects Register (CSOR), located at

http://csrc.nist.gov/csor/ [2].

Implementations of the algorithm that are tested by an accredited laboratory and validated will be

considered as complying with this standard. Since cryptographic security depends on many

factors besides the correct implementation of an encryption algorithm, Federal Government

employees, and others, should also refer to NIST Special Publication 800-21, Guideline for

Implementing Cryptography in the Federal Government, for additional information and guidance

(NIST SP 800-21 is available at http://csrc.nist.gov/publications/).

9. Implementation Schedule. This standard becomes effective on May 26, 2002.

10. Patents. Implementations of the algorithm specified in this standard may be covered by

U.S. and foreign patents.

11. Export Control. Certain cryptographic devices and technical data regarding them are

subject to Federal export controls. Exports of cryptographic modules implementing this standard

and technical data regarding them must comply with these Federal regulations and be licensed by

the Bureau of Export Administration of the U.S. Department of Commerce. Applicable Federal

government export controls are specified in Title 15, Code of Federal Regulations (CFR) Part

740.17; Title 15, CFR Part 742; and Title 15, CFR Part 774, Category 5, Part 2.

12. Qualifications. NIST will continue to follow developments in the analysis of the AES

algorithm. As with its other cryptographic algorithm standards, NIST will formally reevaluate

this standard every five years.

Both this standard and possible threats reducing the security provided through the use of this

standard will undergo review by NIST as appropriate, taking into account newly available

analysis and technology. In addition, the awareness of any breakthrough in technology or any

mathematical weakness of the algorithm will cause NIST to reevaluate this standard and provide

necessary revisions.

13. Waiver Procedure. Under certain exceptional circumstances, the heads of Federal

agencies, or their delegates, may approve waivers to Federal Information Processing Standards

(FIPS). The heads of such agencies may redelegate such authority only to a senior official

designated pursuant to Section 3506(b) of Title 44, U.S. Code. Waivers shall be granted only

when compliance with this standard would

a. adversely affect the accomplishment of the mission of an operator of Federal computer

system or

b. cause a major adverse financial impact on the operator that is not offset by government-

wide savings.

iii

Agency heads may act upon a written waiver request containing the information detailed above.

Agency heads may also act without a written waiver request when they determine that conditions

for meeting the standard cannot be met. Agency heads may approve waivers only by a written

decision that explains the basis on which the agency head made the required finding(s). A copy

of each such decision, with procurement sensitive or classified portions clearly identified, shall

be sent to: National Institute of Standards and Technology; ATTN: FIPS Waiver Decision,

Information Technology Laboratory, 100 Bureau Drive, Stop 8900, Gaithersburg, MD 20899-

8900.

In addition, notice of each waiver granted and each delegation of authority to approve waivers

shall be sent promptly to the Committee on Government Operations of the House of

Representatives and the Committee on Government Affairs of the Senate and shall be published

promptly in the Federal Register.

When the determination on a waiver applies to the procurement of equipment and/or services, a

notice of the waiver determination must be published in the Commerce Business Daily as a part

of the notice of solicitation for offers of an acquisition or, if the waiver determination is made

after that notice is published, by amendment to such notice.

A copy of the waiver, any supporting documents, the document approving the waiver and any

supporting and accompanying documents, with such deletions as the agency is authorized and

decides to make under Section 552(b) of Title 5, U.S. Code, shall be part of the procurement

documentation and retained by the agency.

14. Where to obtain copies. This publication is available electronically by accessing

http://csrc.nist.gov/publications/. A list of other available computer security publications,

including ordering information, can be obtained from NIST Publications List 91, which is

available at the same web site. Alternatively, copies of NIST computer security publications are

available from: National Technical Information Service (NTIS), 5285 Port Royal Road,

Springfield, VA 22161.

Federal Information

Processing Standards Publication 197

November 26, 2001

Specification for the

ADVANCED ENCRYPTION STANDARD (AES)

Table of Contents

1. INTRODUCTION............................................................................................................................................. 5

2. DEFINITIONS .................................................................................................................................................. 5

2.1 GLOSSARY OF TERMS AND ACRONYMS........................................................................................................... 5

2.2 ALGORITHM PARAMETERS, SYMBOLS, AND FUNCTIONS................................................................................. 6

3. NOTATION AND CONVENTIONS............................................................................................................... 7

3.1 INPUTS AND OUTPUTS ..................................................................................................................................... 7

3.2 BYTES ............................................................................................................................................................. 8

3.3 ARRAYS OF BYTES .......................................................................................................................................... 8

3.4 THE STATE ...................................................................................................................................................... 9

3.5 THE STATE AS AN ARRAY OF COLUMNS........................................................................................................ 10

4. MATHEMATICAL PRELIMINARIES....................................................................................................... 10

4.1 ADDITION...................................................................................................................................................... 10

4.2 MULTIPLICATION .......................................................................................................................................... 10

4.2.1 Multiplication by x.............................................................................................................................. 11

4.3 POLYNOMIALS WITH COEFFICIENTS IN GF(2

) .............................................................................................. 12

5. ALGORITHM SPECIFICATION................................................................................................................. 13

5.1 CIPHER.......................................................................................................................................................... 14

5.1.1 SubBytes()Transformation............................................................................................................ 15

5.1.2 ShiftRows() Transformation ........................................................................................................ 17

5.1.3 MixColumns() Transformation...................................................................................................... 17

5.1.4 AddRoundKey() Transformation.................................................................................................. 18

5.2 KEY EXPANSION ........................................................................................................................................... 19

5.3 INVERSE CIPHER............................................................................................................................................ 20

评论收藏

内容反馈