I've two Excel files with same data. One is in Excel 2003 (.xls) format and other one is in Excel 2007 (.xlsx) format. I've generated one way hash using SHA-1 algorithm. But the hash value of Excel 2003 files is not same as the hash value of Excel 2007 file.
What might be the problem.
Joined: Aug 14, 2009
xls is a binary format while xlsx is an xml based format so even if they contain the same data, their hash are not the same.