I have to decode a proprietary file format which mainly contains time series data. The only thing I was told was that the content is 'zipped', although I am not sure whether it is really zipped or some in-house compression method is used. Here is a snippet of the data:
I did a [byte] frequency analysis and it shows a uniform distribution. If the bytes are plot (with A.X.E.), a very homogeneous image is shown:
I've checked for the header of common compression algorithms but found none of them.
Any help is highly appreciated.
The executable which produced/validated these files is not available.
binwalk -Me <filename> (github.com/devttys0/binwalk) it is possible to extract two zlib-ed files from each of the previous files.
Here's the header of one of the files: