Encryption type in sharpziplib

Question

I'm using sharplibzip to zip my files with password. I cannot find, what encryption does it use - I need to know that to decide, if I can be sure no one is able to unzip without knowing the password. I can use very long password in my app too.

EDIT: So, this library can use AES encryption, you have ZipEntry.AESKeySize for that. And if you use 128 or longer keysize - that will be practically uncrackable.

ProgramFOX · Accepted Answer · 2013-10-05T15:42:28.337

0

SharpZipLib uses PkzipClassic and AES.

if I can be sure no one is able to unzip without knowing the password

If you use AES with a key size of 128 or higher, then yes, you can be sure. Please see this article:
http://www.eetimes.com/document.asp?doc_id=1279619
According to that article, it would take 3.31 * 10⁵⁶ years to crack a 256-bit key.

edited Oct 05 '13 at 15:42

answered Oct 05 '13 at 15:28

ProgramFOX

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Yes, I found the way to set encryption type to AES 256. I know, that AES can't be hacked without the password - isn't that true for zipping? – DizzyBlack Oct 05 '13 at 15:36
Well, not that it cannot be done, but it will take unwisely long amount of time. – DizzyBlack Oct 05 '13 at 15:40
I updated my answer. If you use AES 256, then it really takes a very very very large amount of time before it's cracked. – ProgramFOX Oct 05 '13 at 15:43
Thanks! Just needed to be sure! – DizzyBlack Oct 05 '13 at 15:48

Encryption type in sharpziplib

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