IEEE P1735 Draft Development Committee Meeting of July 29, 2013

Meeting Info

Conference Bridge and Live-Meeting


  • Attending
    • Steven Dovich, (chair) Cadence DR
    • Dave Graubart, Synopsys DR
    • Ray Martin, Xilinx DR
    • John Shields, Mentor DR
    • Dave Clemans, Synopsys DRA

  • Not Attending
    • Jeff Fox, Altera DR
    • Michael Smith, Synopsys DRA
    • Jarek Kaczynski, Aldec DR
    • Devin Sundaram, Altera DRA
    • Joe Daniels, P1735 Technical Editor
    • Krista Gluchoski, IEEE Professional Services
    • Parminder Gill, Synopsys DRA
    • Premduth Vidyanandan, Xilinx
    • Nick Sgoupis, CAST
    • Albert Chiang, Synopsys
    • Nitin Khurana, Cadence DRA
    • David Pena, Cadence
    • Bin Dai, Xilinx
    • Ruchi Tyagi, Cadence DRA
    • Syed Huq, Cisco
    • Meera Srinivasan, Synopsys
    • David Tran, Synopsys


  1. Patent slides
  2. Comment and Open Issue review
  3. Adjourn


Patent Policy

The Patent slides were offered for review.

No new claims were disclosed at the call for essential patent claims.

Comment and Open Issue review


Analysis from Jarek regarding algorithm recommendations:
Algorithm (key length) Operation Security NIST recommendation P1735 recommendation
DES Encryption/Decryption Compromised Disallowed Legacy-use
3DES(TDEA) 3 keys version Encryption/Decryption Secure Acceptable Recommended?Deprecated?
AES (128 and 256) Encryption/Decryption Secure Acceptable Recommended
RSA (<2048) Encryption/Signing Questionable Disallowed Deprecated?
RSA (<2048) Decryption/Verification Questionable Legacy-use Deprecated?
RSA (>=2048) All operations Secure Acceptable Recommended
MD4 Hashing Compromised Disallowed Legacy-use
MD5 Hashing Compromised Disallowed Legacy-use
SHA-1 Hashing - signatures Questionable Legacy-use Deprecated?
SHA-2 (SHA-256,512) Hashing Secure Acceptable Recommended

The working group converged on defining deprecation as only supported for use in Version 0 envelopes. The intention is that Version 1 and 2 will only use the algorithms identified as Recommended. That approach has the benefit of not conflicting with existing LRM requirements, but puts them in a context of legacy use with limitations.


John summarized the HDL semantics and cases where restricting visibility for protected IP is necessary. Ray suggested a dual distribution requirement with both a viewport-enabled and a viewport-disabled version. John noted that would not resolve all the cases.

The case with the fewest options for solution is instantiation of an open interface from within a protected envelope. End-users then have the ability to create a replacement definition that supports the interface semantics and extracts pathnames (and other discoverable attributes?) from the hierarchy that goes through the protected envelope.

Dave's suggestion from last week of an additional right seemed attractive. The group discussed whether that should be a common right or a tool-specific right. Steven suggested that defining it as a common right where the only defined value was "delegated" would give us a migration path to the desired result, even if we cannot completely articulate that for this version of the standard. That would rely on tool-specific rights which address the desired behaviors.

Steven asked the working group to consider a single common right with a delegated value as a crude fallback if defining a more comprehensive rights framework would take longer to achieve consensus. John thought he could define something more detailed based on the verbal consensus and his understanding of the problem. Since this is the long-pole in the schedule, John agreed to provide Steven a completion estimate so the PAR revision could be submitted.

Work Plan

Date Clause Title Champion Status
7/15 1 Intro Steven  
7/8 2 Normative Ref ?  
7/12 3 Definitions ?  
7/16 4 Trust Steven  
7/19 5 Interop Ray  
7/17 6 Key Mgmt Steven  
6/21 7 Rights Mgmt Dave G done
7/8 8 License Mgmt Dave G  
6/28 9 Common Rights John done
7/10 10 Visibility John  
7/8 A Bibliography ?  
6/28 B Required Algorithms ?  
4/25 X Visbility Annex John done

Next Meeting

The next Draft Development Committee meeting is scheduled for August 12, 2013 at 16:00UTC.

Tentative Agenda

  1. Patent slides
  2. Comment and Open Issue review
  3. Adjourn


Meeting adjourned at 16:35UTC


These minutes are unapproved.

-- StevenDovich - 2013-07-29

Topic revision: r2 - 2013-07-29 - 19:20:53 - StevenDovich
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