scope:

Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.

Amendment 1 to ISO/IEC 10118-3:2004 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 27, IT Security techniques.

Amendment 1 to ISO/IEC 10118-3:2004 was written to serve two purposes.

First, with the inclusion of Dedicated Hash-Function 8 (SHA-224), ISO/IEC 10118-3:2004 now includes the complete family of SHA hash-functions. The description of SHA-224 is given in Clause 14. Test vectors for SHA-224 are given in A.8.

Second, it was noted that there were implementations of SHA-384 and SHA-512 in the field which correctly reproduced the test vector examples in ISO/IEC 10118-3:2004, yet still failed for inputs containing bytes that were not standard ASCII codes. In order to perform comprehensive testing of the SHA-224, SHA-256, SHA- 384 and SHA-512 hash-functions, an extended set of test vectors is included for ISO/IEC 10118-3:2004 as a part of this amendment. This additional test vector information is given in A.9.