Q: I need to send an important #Excel
document. Is the built-in password protection sufficient, or is it better to provide some kind of additional protection for it?
A: If the document is Excel 2007-2013 (xlsx-file) and it doesn't contain data relating to national security :), then there is no need for additional protection beyond a complex password to open it.
The speed of a password search for #xlsx
files is relatively slow on even top-of-the-line GPUs.
A complex password is a synthetic #password
that is made up of a random collection of at least eight different symbols (upper/lower case, digital, special symbols). That's it! If you lose one of these passwords, you aren't likely to recover it yourself! :)
But if you set up a password something like "WorldCupBrazil2014", then it doesn't matter how strong a container you use, Excel, #WinRar
. A password like that can be broken at will in a few minutes.
IMPORTANT! Never use simple words as passwords if they are supposed to protect important information! Use password managers (#Keepass for example) to generate and store complex passwords.
However, if the document is Excel 97-2003, then things get much worse (or better? :)). These documents can be decrypted in a few minutes. There are special on-line services for that - www.AccessBack.com
, and it doesn't matter at all them how complex the password is.
files must be archived prior to sending.
WinRar/7Zip/#WinZip (provided AES encryption is included) provide reliable protection. And if you use a complex password, it goes without saying.
That's it in a nutshell.