This document has been prepared by the 3GPP Task Force, and contains an example set of algorithms which may be used as the authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*. (It is not mandatory that the particular algorithms specified in this document are used - all seven functions are operator-specifiable rather than being fully standardised). This document is one five, which between them form the entire specification of the example algorithms, entitled:

• 3GPP TS 35.205: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the MILENAGE Algorithm Set: An example algorithm set for the 3GPP authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*;
  Document 1: General".
• 3GPP TS 35.206: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the MILENAGE Algorithm Set: An example algorithm set for the 3GPP authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*;
  Document 2: Algorithm Specification".
• 3GPP TS 35.207: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the MILENAGE Algorithm Set: An example algorithm set for the 3GPP authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*;
  Document 3: Implementors' Test Data".
• 3GPP TS 35.208: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the MILENAGE Algorithm Set: An example algorithm set for the 3GPP authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*;
  Document 4: Design Conformance Test Data".
• 3GPP TR 35.909: "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the MILENAGE Algorithm Set: An example algorithm set for the 3GPP authentication and key generation functions f1, f1*, f2, f3, f4, f5 and f5*;
  Document 5: Summary and results of design and evaluation".

The name of this algorithm set is "MILENAGE". It should be pronounced like a French word - something like "mi-le-nahj".

Clause 2 introduces the algorithms and describes the notation used in the subsequent sections. Clause 3 explains how the algorithms are designed as a framework in such a way that various "customising components" can be selected in order to customise the algorithm for a particular operator. Clause 4 defines the example algorithms. The algorithm framework is defined in clause 4.1; in clause 4.2, specific instances of the components are selected to define the specific example algorithm set. Clause 5 explains various options and considerations for implementation of the algorithms, including considerations to be borne in mind when modifying the customising components. Illustrative pictures are given in Annex A1. Annex A2 gives a specification of the block cipher algorithm which is used as a cryptographic kernel in the definition of the example algorithms. Annexes A3 and A4 contain source code in the C programming language: Annex A3 gives a complete and straightforward implementation of the algorithm set, while Annex A4 gives an example of an alternative high-performance implementation just of the kernel function.