protect compressed archive with a password...

[ennservogt]

Hi,
I have been desperately searching for an archive format that fullfills the following requirements:

- Archives can be protected with a password.
The archives must not be cracked.

- There should be easy to use programs with GUIs, both under Windows and Linux, that can
compress an decompress using this archive format.

- The programs and the compressions routines should be open source.

- Primarily multimedia files will be stored in those archives,
so there is no need for good compression rates.

I was not able to find one archive format that fits my requirements, though I have searched a lot (wikipedia, google,... ). Am I blind? Maybe I just need a hint.

The problem with the zip archive format is, that there are patent issues with the compression algorithm and it is not open source, isn't it?


Thanks in advance
EnnserVogt

[hjnenc]