Groups - 11-07-11-proposal00090 uploaded

[Dennis Hamilton<dennis.hamilton@acm.org>]

        Submitter's message
        This is a PDF version for those who find that format convenient
        
-- Mr. Dennis Hamilton

Document Name: 11-07-11-proposal00090

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Description
PDF Format Version:

v1.05 of a proposal to add two protection-key-digest-algorithm methods,
including a replaement for the pre-1.3 default case.

AUTHZ160 does not depend on a hashing algorithm to match is value in order
to authenticate removal of a protection.

SHA1DK is password based but it uses salt values and iterated hashing to
make it far more costly to attempt to discover the password used by
repeated trials. Passwords that are used should still be considered
compromisable simply because the protection key, even though 320 bits, is
still available in plain sight and subject to off-line attacks.

1. Rationale
1.1 Vulnerability of Password Hash Values
1.2 SHA1DK for Password-Based Protection-Key Values
1.3 AUTHZ160 for Password-Less Protection-Key Values

2. Proposed Changes

3. Deployment Considerations
3.1 Down-Level Considerations
3.2 Immediate Usabilty of AUTHZ160 for Default Protection
Keys
3.3 Confirmation of Resilient Down-Level Treatment
3.4 Future-Proofing of Extended ODF 1.2 Consumers and
Producers


B. Proposed Changes

1. Front Page
2. Section 19.697 table:protection-key
3. Section 19.698 table:protection-key-digest-algorithm
4. Section 19.850 text:protection-key
5. Section 19.851 text:protection-key-digest-algorithm

C. Deployment Considerations
Download Latest Revision
Public Download Link

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Submitter: Mr. Dennis Hamilton
Group: OASIS Open Document Format for Office Applications (OpenDocument) TC
Folder: Proposals
Date submitted: 2012-06-11 22:14:29
Revision: 4