Report: the digital signature WG of JNSA

[MURATA Makoto]

Dear colleagues,

The digital signature WG of the Japan Network Security
Association (JNSA) is involved in the standardization
and implementation of XAdES among others.  This WG and
the Japanese SC34 mirror are going to work together for
XAdES in OOXML and DOF.

In 2008, some members of the that WG contacted me and
requested the addition of XAdES to OOXML.  Since then,
I have occasionally contacted them.  Now that XAdES is
now an important topic of both the ODF 1.2 DIS ballot
and the revision of 29500-2, they are very interested.

On 2014-05-13, I attended a meeting of this WG.  I
explained the current status of OOXML, ODF, and EPUB.
They explained to me what is going on in ETSI, which
develops XAdES, and ISO/TC 154, which standardized
XAdES as ISO 14533-2:2012.

As far as I know, experts of office documents do not
know digital signature well.  Meanwhile, digital
signature experts do know office documents well.
Nevertheless, both camps are involved in digital
signature for office documents.  There are certainly
overlaps and small conflicts.

Two activities in the digital signature camp appear to
be particularly relevant:

  ETSI TS 102 918 – Associated Signature Associated
  Signature Containers (ASiC).  This is a ODF or
  EPUB-like package format for XAdES.

  D.14 The xadesenv111:Renewed Digests element in Draft
  EN 319 132-1 V0.0.4 (2013-11) (a revision of XAdES).
  It is believed that the use of manifest in OOXML for
  digital signature is week when hash algorithms are
  compromised.  Renewing digests is created as a remedy.

They are going to participate in the Japanese SC34
mirror committee as observers.  I believe that they
will contribute to the revision of OOXML Part 2 as well
as preparation of the Japanese vote for ODF 1.2.

Regards,
Makoto
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