[SunHELP] unsupported compression method 99
martin at omniconsumerproducts.com
Wed Dec 19 15:10:20 CST 2007
On Wed, 19 Dec 2007, Rodney Sparapani wrote:
> I have been having a problem unzip'ing password protected zip files from
> Windows users with the error message: unsupported compression method 99
> Maybe others already know about this, but
> it has only been recently that unzip stopped working for us, perhaps due
> to a change in Windows?
The method for password-protecting Zip files changed a couple of years
ago. The old encryption method was too easy to brute-force on modern
hardware. I believe it now uses AES.
Could it be that your users have finally upgraded from the old vulnerable
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