Table of Contents

Foreword
American National Standards Institute
1 Scope
2 Normative References
3 Definitions
4 Symbols and Abbreviations
5 Organization
6 Specifications
6.1 TDEA Encryption/Decryption Operation
6.2 Keying Options
6.3 TDEA Modes of Operation
6.4 Backward Compatibility
6.5 Schedule of DEA Functional Blocks
6.6 Improving Throughout and Minimizing Propagation
6.7 Keys and Initialization Vectors
6.8 Input and Output
7 TDEA Modes of Operation
7.1 TDEA Electronic Codebook Mode of Operation
7.1.1 TECB Definition
7.1.2 TECB Properties
7.2 TDEA Cipher Block Chaining Mode of Operation
7.2.1 TCBC Definition
7.2.2 TCBC Properties
7.3 TDEA Cipher Block Chaining Mode of Operation - Interleaved
7.3.1 TCBC-I Definition
7.3.2 TCBC-I Properties
7.4 TDEA Cipher Feedback Mode of Operation
7.4.1 TCFB Definition
7.4.2 TCFB Properties
7.5 TDEA Cipher Feedback Mode of Operation - Pipelined
7.5.1 TCFB-P Definition
7.5.2 TCFB-P Properties
7.6 TDEA Output Feedback Mode of Operation
7.6.1 TOFB Definition
7.6.2 TOFB Properties
7.7 TDEA Output Feedback Mode of Operation - Interleaved
7.7.1 TOFB-I Definition
7.7.2 TOFB-I Properties
Annex A ASN.1 Syntax for TDEA Modes of Operation (normative)
A.1 Overview
A.2 Syntax for TDEA Modes of Operations
A.3 Object Identifiers
A.4 Supporting Definitions
A.5 ASN.1 Module
Annex B TDEA Modes of Operation Cryptographic Attributes (informative)
B.1 Mode of Operation
B.2 Key Attacks
B.3 Text Attacks
B.3.1 Stream Cipher Cycle Length
B.3.2 Text Dictionary
B.3.3 Matching Ciphertext
B.4 Guidance on the Authentication of Data
Annex C Examples of TDEA Modes of Operation (informative)
C.1 TDEA Electronic Codebook Mode (TECB)
C.1.1 TECB Encryption
C.1.2 TECB Decryption
C.2 TDEA Cipher Block Chaining Mode (TCBC)
C.2.1 TCBC Encryption
C.2.2 TCBC Decryption
C.3 TDEA Cipher Block Chaining Mode - Interleaved (TCBC-I)
C.3.1 TCBC-I Encryption
C.3.2 TCBC-I Decryption
C.4 TDEA Cipher Feedback Mode (TCFB)
C.4.1 TCFB1
C.4.2 TCFB8
C.4.3 TCFB64
C.5 TDEA Cipher Feedback Mode - Pipelined (TCFB-P)
C.5.1 TCFB1-P
C.5.2 TCFB8-P
C.5.3 TCFB64-P
C.6 TDEA Output Feedback Mode (TOFB)
C.6.1 TOFB Encryption
C.6.2 TOFB Decryption
C.7 TDEA Output Feedback Mode - Interleaved (TOFB-I)
C.7.1 TOFB-I Encryption
C.7.2 TOFB-I Decryption

Abstract

Specifies the Triple Data Encryption Algorithm (TDEA) modes of operation for the enhanced cryptographic protection of digital data. Modes of operation are specified for both deciphering and enciphering operations, and are based on three-fold compound operations of encryption and decryption using ANSI X3.92 Data Encryption Algorithm (DEA). TDEA may be implemented in hardware, software, or a combination of both. The TDEA modes of operation may be used in both wholesale and retail financial applications. For use with other ANSI X9 standards using DEA.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Bankers Association
Pages
ISBN
Committee	X9