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Software Code Signing

ISO/IEC JTC 1/SC 22/WG 23 N0358. Software Code Signing. Jim Moore 7 September 2011 Revision 3. Proposed Work. Append digital signatures to source code so that: Receiver can identify the developer of the code Receiver can be assured that the code has not been modified by a third party

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Software Code Signing

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  1. ISO/IEC JTC 1/SC 22/WG 23 N0358 Software Code Signing Jim Moore 7 September 2011 Revision 3 Prepared for JTC 1/SC 22

  2. Proposed Work • Append digital signatures to source code so that: • Receiver can identify the developer of the code • Receiver can be assured that the code has not been modified by a third party • Receiver can determine the responsible party for each set of changes to code • Receiver can “unwrap” changes (i.e. to get back to a previously signed version which is trusted or has been verified) • All of these are real-world problems today. Prepared for JTC 1/SC 22

  3. Background • NWIP was balloted last year – SC 22 N 4575. • Balloting results: • “Sufficient definition”– 10 (yes), 1 (no), 7 (abstain) • “Support the addition”– 9 (yes), 1 (no), 8 (abstain) • “Commit to participate”– 4(yes), 6 (no), 8 (abstain) • “Offer project editor”– 1 (yes), 10 (no), 7 (abstain) • “Contribution ready”– 0 (yes), 11 (no), 7 (abstain) • “Contribution in 90 days”– 0 (yes), 11 (no), 7 (abstain) • “Development track”– 18 (default), 0 (acc.), 0 (ext.) Prepared for JTC 1/SC 22

  4. One comment on ballot • From Japan: Since there is no working draft attached to the proposal, the proposal does not comply with the clause 2.3.4 of ISO/IEC Directives, Part 1, which says that the originator of the new work item proposal shall make every effort to provide a first working draft for discussion, or shall at least provide an outline of such a working draft. We cannot judge it gives the sufficient definition of the new work item. For example, the following questions should be answered. - What kind of technology is applied to the issue? - What is to be standardized? encryption method? protocol in software market? - Can the technology be applied to any programming language without changing the language per se? - Does the technology assume a general and conceptual infrastructure or a specific one available now? Prepared for JTC 1/SC 22

  5. Responses to Comment • What kind of technology is applied to the issue? • Well-known digital signature technology • What is to be standardized? encryption method? protocol in software market? • Application programming interfaces to add/check/use signatures • Format of signature • Can the technology be applied to any programming language without changing the language per se? • The APIs are written in a language-independent manner. • Does the technology assume a general and conceptual infrastructure or a specific one available now? • A method of operation is described in an informative part of the draft. Prepared for JTC 1/SC 22

  6. Participation • Agreed to “participate” on original NWIP vote: • Canada (SCC) • China (SAC) • Italy (UNI) • USA (ANSI) • Additional possible candidates: • Japan for expertise in a “modern” language (Ruby) • Netherlands for expertise in language-independent interfaces • UK for expertise in software security • Others? Prepared for JTC 1/SC 22

  7. Summary • A preliminary working draft is now available. • It will be circulated with a revised NWIP. • We hope that additional nations will choose to “participate.” • Participation means simply the willingness to review drafts and cast a ballot. Attendance at meetings is not required. • We prefer to do the work in SC 22 due to experience in language-independent specification Prepared for JTC 1/SC 22

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