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Subject: [OASIS Issue Tracker] Updated: (OFFICE-3709) ODF 1.3: PackageEncryption Enhancements
[ http://tools.oasis-open.org/issues/browse/OFFICE-3709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Robert Weir updated OFFICE-3709: --------------------------------- Affects Version/s: ODF 1.2 COS 1 (was: ODF 1.2) Resolution: Member-submitted proposal for ODF 1.3 > ODF 1.3: Package Encryption Enhancements > ---------------------------------------- > > Key: OFFICE-3709 > URL: http://tools.oasis-open.org/issues/browse/OFFICE-3709 > Project: OASIS Open Document Format for Office Applications (OpenDocument) TC > Issue Type: Improvement > Components: Packaging, Part 3 (Packages), Security > Affects Versions: ODF 1.2 COS 1 > Environment: This is an enhancement, described in terms of changes to OpenDocument-v1.2-cs01-part3 > Reporter: Dennis Hamilton > Assignee: Dennis Hamilton > Fix For: ODF 1.3 CSD 01 > > > In the default encryption method for packages, the same start-key, the SHA1 digest of the user-entered-password, is used for all key generations for encrypting the individual parts of the package. Although the start-key is a secret, its successful attack permits decryption of the entire package. > This proposal adds a method by which the start key is different for every key generation, relying on the cryptographically-random and different manifest:salt that is created for each key generation. This means that successful attack of one start key does not provide the start key for any of the other encryptions. > Note: This procedure does not materially impact attacks on the user-specified password, which remain at least as vulnerable as memorable passwords generally are. > In addition, the proposal adds an additional manifest:checksum-type that is salted in a way that avoids production of duplicate checksums for the same-plaintext files in different encrypted documents, reducing any attack surface that the detection of same-plaintext files may offer.. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://tools.oasis-open.org/issues/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
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