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Dave Sully
Admin Group
Joined: 01 Jun 2007 Location: United Kingdom Online Status: Offline Posts: 10 |
![]() Topic: Winzip - Data security and compressionPosted: 21 Aug 2008 at 10:27am |
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Hello All
As we have an increasing number of issues regarding the compression and encryption of data electronically transferred I am posting a small FAQ here in order to assist those who may be having problems.
Why zip and why encrypt?
Zipping files is obviously to reduce file size and make the file easier to transfer electronically. Encrypting the contains of a zip file scrambles the contents requiring a password to open and extract the file. Once a file is encrypted its contents are secured until such time that it is decrypted.
Why can't I receive my files unencrypted?
As much of the data Woods transfer contains sensitive information (name, address, financial information) it is company policy to transmit data only in a secure fashion. This is to protect both us and our clients.
Further reading
How do you encrypt your files?
Our files are zipped using WinZip 11 with AES 256 encryption method.
Why can't I open the zip file I have received from Woods?
Case 1 - I use windows to open zip files
Windows only contains basic zip handling functions, therefore cannot open encrypted zip files
Case 2 - I use WinZip to open zip files
WinZip only supports AES 256 encryption from version 9 onwards if you have an older version of WinZip you may well receive a "not a valid zip file" error message.
Case 3 - I use another program to open zip files
Unfortunately we cannot support all of the many different types of zip programs available.
OK I still can't open the file what can I do next?
1 - Try WinZip (Free to try for 90 days 29.99 Euros for a single license)
WinZip is free to try for an evaluation period and the latest version is available from
With WinZip you will be able to both create and read encrypted zip files
2 - Use ZIP Reader (Free)
Zip reader is a freeware program that will read and extract zip files, however you will not be able to create your own zip files from the program.
or
I can't install software on my PC, are there any other options?
We can provide an FTP account with secure login details if you are able to receive files via FTP although the previous two solutions are preferred and easier to support. It may well be worth talking to your IT department about installing some Zip reading software on your PC where at all possible. Edited by Dave Sully - 22 Aug 2008 at 10:53am |
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Dave Sully
IT Manager Woods Group |
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