CAN/CSA-ISO/IEC ISP 10613-20-01 (R2005)

This National Standard of Canada is equivalent to International Standard ISO/IEC ISP 10613-20:1998. 1 Scope 1.1 General ISO/IEC ISP 10613 is applicable to interworking units concerned with operating in the Open Systems Interconnection (OSI) environment. It specifies a combination of OSI standards that collectively provide a Network Relay function for the connection-mode Network Service. Part 7 of ISO/IEC ISP 10613 specifies subnetwork type dependent requirements for an interworking unit when attached to an X.25 packet switched data network by a dedicated (permanent) access line and using virtual calls. This part of ISO/IEC ISP 10613 specifies the profile requirements for the provision of security services using cryptographic techniques with Network Layer Security Protocol connection-mode and SDT-PDU based protection for use with X.25 packet switched data networks as specified in part 7 of 10613. 1.2 Position within the Taxonomy The taxonomy of profiles is specified in ISO/IEC TR 10000-2. This part of ISO/IEC ISP 10613 supports security services for RA1111 and RA1121 profiles as specified in ISO/IEC ISP 10613 part 5. Note: ISO/IEC TR 10000 currently does not identify security sub- profiles. Profiles based on this part of ISO/IEC ISP 10613 may be referred to as RA11n1S2, or RA11n1S2C if confidentiality is selected. 1.4 Security Services The following security services are within the scope of this profile: a) Peer entity authentication b) Connection integrity without recovery (including replay protection) c) Access control using security labels Note: Where label based access control is not enforced by a system a null label may be employed. d) Connection confidentiality (optional) e) Traffic flow confidentiality (optional) 1.5 Security Mechanisms This part of ISO/IEC ISP 10613 provides no assurance as to the strength of the security mechanisms employed. This part of ISO/IEC ISP 10613 does not specify the cryptographic algorithms to be employed.