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1. #EXCEL FOR MAC WORKBOOK TAKES LONG TIME TO UPDATE CRACKED#
2. #EXCEL FOR MAC WORKBOOK TAKES LONG TIME TO UPDATE MANUAL#

So even when the same password is hashed multiple times, the hashes are not the same! Excel 2013 prevents such attacks by randomizing each hash with the use of a salt value. One approach to crack hashes are cryptographic lookup and rainbow tables. However, the SHA512 hash algorithm used Excel 2013 is quite secure.

These 16-bit long plain hashes are very easy to hack, so working passwords can be recovered fast. Here is a look inside an OpenXML file saved in Excel 2013:Įxcel versions up-to 2010 used an outdated hashing algorithm. In case you are not aware, read about the differences between Office 365 and Office 2016. The perpetual license version of Office 2013 or 2016 does not use the new hashing algorithm.Caution: Excel 2007-2016 will become unresponsive (hang), if any old-school password remover add-in attempts to unprotect a sheet protected (with SHA512) in Excel 2013 or 2016 using a VBA brute-force attack.So working passwords cannot be recovered. It is impossible to find multiple passwords that share the same hash value in Excel 2013, as was the case with Excel up to Office 2010 version.

#EXCEL FOR MAC WORKBOOK TAKES LONG TIME TO UPDATE CRACKED#

#EXCEL FOR MAC WORKBOOK TAKES LONG TIME TO UPDATE MANUAL#

Have you noticed that sheet protection VBA methods run much slower in Excel 20? That's because the new complex hashing algorithm takes longer to compute. For single sheet manual protection operations the delay is barely noticeable, but when add-ins or macros unlock/lock sheets in bulk, the delay can be significant. Office 2013 has silently introduced security changes in order to strengthen Excel protection!