BS ISO 11568-1:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Aspects of key management
   4.1 Purpose of security
   4.2 Level of security
   4.3 Key management objectives
5 Principles of key management
6 Cryptosystems
   6.1 Overview
   6.2 Cipher systems
   6.3 Symmetric cipher systems
   6.4 Asymmetric cipher systems
   6.5 Other cryptosystems
7 Physical security for cryptographic environments
   7.1 Physical security considerations
   7.2 Secure cryptographic device
   7.3 Physically secure environment
8 Security considerations
   8.1 Cryptographic environments for secret/private keys
   8.2 Cryptographic environments for public keys
   8.3 Protection against counterfeit devices
9 Key management services for cryptosystems
   9.1 General
   9.2 Separation
   9.3 Substitution prevention
   9.4 Identification
   9.5 Synchronization (availability)
   9.6 Integrity
   9.7 Confidentiality
   9.8 Compromise detection
10 Key life cycles
   10.1 General
   10.2 Common requirements for key life cycles
   10.3 Additional requirements for asymmetric cryptosystems
Annex A (normative) Procedure for approval of additional
        cryptographic algorithms
Annex B (informative) Example of a retail banking environment
Annex C (informative) Examples of threats in the retail
        banking environment
Bibliography

Specifies the principles for the management of keys used in cryptosystems implemented within the retail banking environment. The retail banking environment includes the interface between: - a card accepting device and an acquirer, - an acquirer and a card issuer, - an ICC and a card-accepting device.

This part of ISO11568 specifies the principles for the management of keys used in cryptosystems implemented within the retail banking environment. The retail banking environment includes the interface between

• a card accepting device and an acquirer,

• an acquirer and a card issuer,

• an ICC and a card-accepting device.

An example of this environment is described in AnnexB, and threats associated with the implementation of this part of ISO11568 in the retail banking environment are elaborated in AnnexC.

This part of ISO11568 is applicable both to the keys of symmetric cipher systems, where both originator and recipient use the same secret key(s), and to the private and public keys of asymmetric cryptosystems, unless otherwise stated. The procedure for the approval of cryptographic algorithms used for key management is specified in AnnexA.

The use of ciphers often involves control information other than keys, e.g. initialization vectors and key identifiers. This other information is collectively called “keying material”. Although this part of ISO11568 specifically addresses the management of keys, the principles, services, and techniques applicable to keys may also be applicable to keying material.

This part of ISO11568 is appropriate for use by financial institutions and other organizations engaged in the area of retail financial services, where the interchange of information requires confidentiality, integrity, or authentication. Retail financial services include but are not limited to such processes as POS debit and credit authorizations, automated dispensing machine and ATM transactions, etc.

ISO9564 and ISO16609 specify the use of cryptographic operations within retail financial transactions for personal identification number (PIN) encipherment and message authentication, respectively. The ISO11568 series of standards is applicable to the management of the keys introduced by those standards. Additionally, the key management procedures may themselves require the introduction of further keys, e.g. key encipherment keys. The key management procedures are equally applicable to those keys.