Roscoe wrote: > On 1/21/06, Ryan Malayter <[EMAIL PROTECTED]> wrote: > <snip> >>The RAR compression algorithm proprietary and closed source, so it is >>not likely to make it into any standards. RARlabs has refused for >>years to allow anyone else to make RAR encoders (although they exist >>in violation of the RARlabs license). >> >>See http://en.wikipedia.org/wiki/RAR >> >>A much better choice would be the LZMA algorithm from 7zip, which is >>open-source and unpatented. It compresses with similar efficiency and >>speed to RAR. >> >>In any case, though, such slow-but-compact algorithms are really only >>useful for archival purposes. While I have used PGP for some >>archiving, this is not the most common usage of PGP, and probably not >>an OpenPGP design goal. >> >>There are much faster file encryption tools than PGP out there. We >>actually use 7zip to compress and encrypt backups for offsite storage, >>as its AES implementation is so much more efficient than GnuPG's. >> > > LZMA seems to be notably[1] faster/better than BZIP2, which has made > it into the standard so I wouldn't immediately rule out its > suitability for OpenPGP. >
How well was LZMA known when BZIP2 made it in? Why was BZIP2 included when ZIP and ZLIB were already available? Does this preclude LZMA? I don't mind adding functionality so long as it is widely supported and will "just work" :) > That said I don't much think it should be included. It could *replace* > BZIP2 but replacing BZIP2 with LZMA would break backwards > compatibility a bit, and adding it resulting in having both BZIP2 and > LZMA seems a bit redundant when we've been getting along fine with > just BZIP2. > Don't forget that ZIP and ZLIB are also there... I regularly use a machine which has GPG 1.4.1 without BZIP2. Interestingingly enough bzip2 exists on the system... > > Back to on-topic-ness... > I'd just use whatever compression scheme you want and pipe it into > |gpg --compress-algo none. > One tool one job :). > Yes, this has the added "advantage" that your recipient has to be able to deal with whatever non-standard compression you choose. YMMV. -- Alphax | /"\ Encrypted Email Preferred | \ / ASCII Ribbon Campaign OpenPGP key ID: 0xF874C613 | X Against HTML email & vCards http://tinyurl.com/cc9up | / \
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