Please note: we don't suggest to use this feature anymore because we made a truly new application that does this job better. It's called CZIP X.
One of the most important features of this versione of ZipGenius is CZIP (formerly known as CryptoZip). This technique offers a better protection for zip archives than the standard password protection method. Today there are many password recovery utilities on the Web, which are really able to discover zip standard industry password; if you use one of them, sooner or later that program will find the correct password and will open the zip file.
On the contrary, ZipGenius can encrypt zip files using four algorhythms:
- CZIP: this is ZipGenius custom algorhythm. It is slow (so it's suggested when encrypting small archives) because it encrypts byte-per-byte, but it's quite secure. You must enter three values between 0 and 65535 ("0-0-0" is not allowed), so you have 1 on 281.474.976.710.656 available combinations. Probably it can be cracked, but it would require too much time to try.
When the original zip file is larger than 10 MB, CZIP algorhythm is not suggested if you want a fast encryption (see below).
- BlowFish: you must enter a pssphrase. The longer passphrase you will use, the stronger encryption you will get. Faster than CZIP.
- TwoFish: you must enter a passphrase. It's faster than CZIP and BlowFish, it's more secure than BlowFish.
- Rijndael: you must enter a passphrase. It's faster then CZIP, slower than BlowFish and TwoFish, but stronger than all the other algorhythms.
ZipGenius introduces CZIP 2.1 file format. This is still an encrypted zip archive but nw its header stores some info and it will let know quickly if given key or passphrase matches or not, without waiting to decrypt the archive and see if decryption failed or not. With CZIP 2.1 files you can store your name and your e-mail address, so that who receives your file can contact you in an easy way. Moreover, CZIP 2.1 let you create three kinds of CZIP files:
- Self-locking: after three wrong keys/passphrases the CZIP archive locks itself.
- Self-erasing: after three wrong keys/passphrases the CZIP archive delete itself.
Finally, you don't have anymore to send any tools to someone before you send him a CZIP file: now you can create Self-Decrypting Archives (SDA), which are in executable format, just as if they were SFX files.
ZipGenius now has a Password Manager to keep track of all keys and passphrases used. The Password Manager can be reached both from ZipGenius and from the Start Menu, and it allows to export the list of keys and passphrases.
WARNING! Once you have encrypted a zip file with CryptoZip, you MUST use the same key you used to encrypt the original zip file, otherwise the encrypted file will remain unreadable. For this reason it is suggested to let ZipGenius store the key/passphrase in the Password Manager.
You can encrypt a zip file by clicking on Actions>Encrypt in the main menu.
If CZIP file has been encrypted with CZIP algorhythm you will have to write the three values used to encrypt it; if archive has been encrypted with one of the other algorhythm, you must type the right passphrase.
Password Manager (optional in ZG Standard)
The new Password Manager replaces the key list dialog available in previous versions of ZipGenius. It is a stand-alone application and it can be reached even from the Start Menu. PM stores all the keys and passphrases you use to encrypt zip files, if you check the related box in the encryption wizard.
If you leave this box unchecked, the key/passphrase won't be stored.
PM stores these info in an encrypted list in order to offer more protection to your data.
When you run PM for the first time, it will prompt you to set a password to allow access to the key list. Once you log in, you will see the following window:
When you gain access to PM, you can:
- Load a .ZGK file
- Reload the default key file
- Copy selected key/passphrase to clipboard
- Export key list to a .ZGK file
- Print the key list
- (See point #3)
- Delete selected item
- Change login password
You will see the list of all available keys and passphrase: you have only to choose one and to report it in the CZIP password box you will see while opening an encrypted archive. When you open an encrypted archive you are prompted to type a key/passphrase or you can click on "Password Manager" to launch PM: if you do so, PM will perform a search in its default key file and, if it finds a filename entry that matches the CZIP filename, it will mark this entry with a red background. Now you can copy the key/passphrase to clipboard (use the related button or right-click on marked entry) so you may paste it in CZIP password box.
PM can be used to read other key files but only if those were created by your copy of PM: when you export a list to a .ZGK file, PM puts the password used to access to PM in that file; when file will be loaded, PM will check if login password is equal to the one stored in the ZGK file. If passwords match, you will see the imported key file, else you will get an error message. REMEMBER: it is highly suggested to leave login password equal to the one used for the first access, because if you change it after you have exported any .ZGK file, those files might be unreadable due to the new login password. This is a security feature: the default key file (the one loaded when PM starts running) is automatically updated with the new login password, so it will be always available to you. That's why it is really important to choose a good login password when PM runs for the first time.
ZGK files can be created by clicking on the related button in the toolbar: the program will ask you to type the login password again, only to do a quick security check, which has no effects, however, on ZGK file creation.
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