Zip file is a compress file. It consists of a sequence of
[local file header]
Where second field(file data ) contains actual file data which is in encrypted form. I found its format from www.worsit.org
I'm interested to know about this encryption. How we convert it back to original data. As there are some Mathematics algorithms appied on Zip file. Where can i find the details of such algo? In header of zip file, there is 4 bytes value, CRC. What is this and how we calculate this value? I want complete descryption. If anybody help then thanks in advance.