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BS ISO/IEC 10116:2017+A1:2021

BS ISO/IEC 10116:2017+A1:2021

$198.66

Information technology. Security techniques. Modes of operation for an n-bit block cipher

Published By Publication Date Number of Pages
BSI 2021 58
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This document establishes the modes of operation for applications of an n-bit block cipher (e.g. protection of data during transmission or in storage). The defined modes only provide protection of data confidentiality. Protection of data integrity is not within the scope of this document. Also, most modes do not protect the confidentiality of message length information.

NOTE 1 Methods for protecting the integrity of data using a block cipher are provided in ISO/IEC 9797‑1 .

NOTE 2 Methods for simultaneously protecting the confidentiality and integrity of data are provided in ISO/IEC 19772 .

This document specifies the modes of operation and gives recommendations for choosing values of parameters (as appropriate).

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PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Symbols, abbreviated terms and notation
4.1 Symbols and abbreviated terms
13 4.2 Notation
5 Requirements
14 6 Electronic Codebook (ECB) mode
6.1 Preliminaries
6.2 Encryption
6.3 Decryption
15 7 Cipher Block Chaining (CBC) mode
7.1 Preliminaries
7.2 Encryption
7.3 Decryption
16 7.4 Avoiding ciphertext expansion
7.4.1 General
7.4.2 Three ciphertext stealing variants of CBC
17 8 Cipher Feedback (CFB) mode
8.1 Preliminaries
18 8.2 Encryption
19 8.3 Decryption
8.4 Avoiding ciphertext expansion
20 9 Output Feedback (OFB) mode
9.1 Preliminaries
9.2 Encryption
21 9.3 Decryption
9.4 Avoiding ciphertext expansion
22 10 Counter (CTR) mode
10.1 Preliminaries
10.2 Encryption
23 10.3 Decryption
10.4 Avoiding ciphertext expansion
11 Counter advanced cryptographic prolongation of key material (CTR-ACPKM) mode
11.1 General
24 11.2 Preliminaries
25 11.3 Encryption
26 11.4 Decryption
11.5 ACPKM transformation
27 Annex A (normative) Object identifiers
29 Annex B (informative) Properties of the modes of operation and important security guidance
36 Annex C (informative) Figures describing the modes of operation
42 Annex D (informative) Numerical examples for the modes of operation
57 Bibliography

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BS ISO/IEC 10116:2017+A1:2021
$198.66