I'd like to know which application is the one mentioned in
[...] we have developed a new tool capable of rescuing damaged compressed files,
according to the DEFLATE compression scheme, even though the header block is missing or corrupted.
Most compression methods work by in effect taking out repeating strings. If a string has been seen in a file it is replaced by a reference. With this method, a history block of data is built up. If the start of the compressed data is missing, the original history data cannot be reconstructed.
On a compressed NTFS disk, data is compressed in 4K blocks so recontructing partial data will be possible, after a 4K (expanded data) boundary. With a ZIP file I would expect there to be a lot of guesses in the final result. Decompression has to start with the start of the compressed data stream.
For a ZIP file containing many files, it will be possible to decompress separate, but complete files without the main ZIP file header. Finding a file start location within a multiple file ZIP file is easy. Recreating missing data is not possible.
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