Valid

GB/T 17710-2008Information technology -- Security technique -- Check character systems (English PDF)

信息技术安全技术校验字符系统

Preview PDF

This is a limited preview

Buy now to download the full PDF (24 pages)

Need quotation for your management?

Get a formal quotation for GB/T 17710-2008 in 30 minutes.

Issued by

General Administration of Quality Supervision, Inspection and Quarantine of the PRC

Level / Type

National · Recommended

Issue date

July 16, 2008

Implementation date

December 1, 2008

Scope

GB/T 17710-2008 is the English-translated version of 信息技术安全技术校验字符系统.

GB/T 17710-2008 is the Chinese standard "Information technology -- Security technique -- Check character systems". Its scope clause reads: 1.1 This Standard specifies a set of check character systems capable of protecting strings against errors which occur when people copy or type data.

The strings may be of fixed or variable length and may have character sets which are a) numeric (10 digits: 0 to 9); b) alphabetic (26 letters: A to Z); and c) alphanumeric (letters and digits).

Embedded spaces and special characters are ignored. 1.2 This Standard specifies conformance requirements for products described as generating check characters or checking strings using the systems given in this Standard.

1.3 These check character systems can detect: a ) all single substitution errors (the substitution of a single character for another, for example "4234" for "1234"); b) all or nearly all single (local) transposition errors (the transposition of two single characters, either adjacent or with one character between them, for example "12354" or "12543" for "12345"); c) all or nearly all circular shift errors (circular shifts of the whole string to the left or right); d) a high proportion of double substitution errors (two separate single substitution errors in the same string, for example "7234587" for "1234567"); and e) a high proportion of all other errors.

1.4 This Standard excludes systems designed specifically to: a) permit both error detection and automatic correction; b) detect deliberate falsification; and c) check strings interchanged solely between machines.

1.5 This Standard is for use in information interchange between organizations. It is also strongly recommended for use in internal information systems. Its clauses include terms and definitions; symbols and notation.

Found what you need?

Document preview — GB/T 17710-2008

National Standard of the People's Republic of China

ICS: 35.040
Classification: L 71

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC

Foreword3
Introduction4
1 Scope5
2 Terms and definitions6
3 Symbols and notation6
4 Types of systems7
5 Compliance and designation8
6 Specification of pure systems10
7 Computational methods for pure systems with one check character11
8 Computational methods for pure systems with two check characters15
9 Specification for hybrid systems17
10 Computational method for hybrid systems applications21
Annex B (Informative) Check character systems for non-Latin alphabets23
Bibliography24

1 Scope

1.1 This Standard specifies a set of check character systems capable of protecting strings against errors which occur when people copy or type data.

The strings may be of fixed or variable length and may have character sets which are a) numeric (10 digits: 0 to 9);

b) alphabetic (26 letters: A to Z); and c) alphanumeric (letters and digits).

Embedded spaces and special characters are ignored.

1.2 This Standard specifies conformance requirements for products described as generating check characters or checking strings using the systems given in this Standard.

1.3 These check character systems can detect:

a ) all single substitution errors (the substitution of a single character for another, for example "4234" for "1234");

b) all or nearly all single (local) transposition errors (the transposition of two single characters, either adjacent or with one character between them, for example "12354" or "12543" for "12345");

c) all or nearly all circular shift errors (circular shifts of the whole string to the left or right);

d) a high proportion of double substitution errors (two separate single substitution errors in the same string, for example "7234587" for

"1234567"); and e) a high proportion of all other errors.

1.4 This Standard excludes systems designed specifically to:

a) permit both error detection and automatic correction;

b) detect deliberate falsification; and c) check strings interchanged solely between machines.

1.5 This Standard is for use in information interchange between organizations.

It is also strongly recommended for use in internal information systems.

2 Terms and definitions

For the purposes of this Standard, the following terms and definitions apply.

2.1 Check character

Added character which may be used to verify the accuracy of the string by a mathematical relationship to that string.

2.2 Check character system

Set of rules for generating check characters and checking strings incorporating check characters.

2.3 Supplementary check character

Check character which does not belong to the character set of the strings which are to be protected.

2.4 Modulus

Integer used as a divisor of an integer dividend in order to obtain an integer remainder.

2.5 Congruence

Property of a set of integers which differ from each other by a multiple of the modulus. Congruence is indicated by the symbol ==. For example, 39 == 6 (mod

11) indicates that 39 and 6 are congruent with respect to the modulus 11, i.e.,

39 - 6 = 33, which is a multiple of 11.

2.6 Radix

Base of a geometric progression.

3 Symbols and notation

Throughout this Standard, the following symbols and notation are used.

Chinese Standards

This is an excerpt of the PDF (Some pages are marked off intentionally)

Full-copy PDF can be purchased from 1 of 2 websites:

nu SEARCH the standard ID, such as GB 4943.1-2022.

nu Select your country (currency), for example: USA (USD); Germany (Euro).

nu Full-copy of PDF (text-editable, true-PDF) can be downloaded in 9 seconds.

nu Tax invoice can be downloaded in 9 seconds.

nu Receiving emails in 9 seconds (with download links).

nu SEARCH the standard ID, such as GB 4943.1-2022.

nu Full-copy of PDF (text-editable, true-PDF) can be downloaded in 9 seconds.

nu Receiving emails in 9 seconds (with PDFs attached, invoice and download links).

Translated by: Field Test Asia Pte. Ltd. (Incorporated & taxed in Singapore. Tax ID: 201302277C)

Linkin: https://www.linkedin.com/in/waynezhengwenrui/

------ The End ------

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

Referenced standards

Cited by

How to Download GB/T 17710-2008

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.