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Thread: New website for ZPAQ, LTCB, DCE,...

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    Matt Mahoney's Avatar
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    New website for ZPAQ, LTCB, DCE,...

    http://mattmahoney.s3-website-us-eas...zonaws.com/dc/

    Yahoo noticed (after 4 years) that lpaq9* executables triggered virus alerts (false alarms due to compressing with upack), so they took down my website at mattmahoney.net without any warning. Of course I am pissed about this but meanwhile I moved everything (except lpaq9*) to the above site until this is resolved or until I figure out how to transfer the domain name from Yahoo. They said it should be fixed by tomorrow but I may close my account with them anyway.

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    You can always post password protected archives. Automatic scanners should be unable to scan such archives.

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    Yeah, or post zpaq archives, until the format becomes popular.

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    The original website is working again. I deleted lpaq9*.zip, decmprs8.zip, decomp8.zip, decomp8b.zip because they contain executables packed with upack which gives false alarms on virus detectors. Everything else should work. http://mattmahoney.net/dc/

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    How about switching to a provider with a sensible AV (or none at all)?

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    I know. Both websites are up. I might keep them both as mirrors.

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    The situation with Upack is very unpleasant. Of course Upack is not the high grade packer like UPX, ASPack, PECompact, but the work the author have made on it is really remarkable. Dwing managed to create an extremely small LZMA decoder for Upack. Judging the information from history file its about 352 bytes in latest versions. Furthermore Upack utilizes different tricks of PE format since some portions of the code and import table are located in header. Well, not too much to proud about, but nice. Its really sad that Upack have been heavily abused by virus\trojan makers. And its also sad that antivirus companies are lazy to create a proper detection and static unpacking routines for Upack.

    Anyway, most of the Upacked files can be unpacked to working exes. So Matt, if you want then I can try to unpack the Upacked files and you can place the "clean" versions on your site.

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    Some of the upacked files are Hutter prize entries. It's probably important to keep them intact for historical purposes. I might put them in zpaq archives so that virus detectors won't trigger on them (at least until the format becomes popular).

    Edit: I replaced lpaq9*, decomp8, decomp8b, decmprs8, and all_HKCC with zpaq archives on the LTCB page.

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