Hack Security Pro.pdf - Index of

12.You can choose a separate Signature which creates a .sig file not pasted to the encrypted file. So
you will have two separate files: one encrypted file, and one signature file. We will not apply this
option.
13.The Output in text form option makes the signature readable in text format, just like the same
option used for encrypting.
14.The signature has been done. You can however do this operation in one step thanks to the Number
& Sign button:
Step 3 : Decrypting (PGP)
To decrypt data that is addressed to you (we therefore suppose that you have the proper private key,
or a conventional key in the case of conventional numbering), double-click on the .pgp or .asc file, or
use the button: Number and Verify.
1. Click on the button
2. Select the file to be decrypted
3. Enter your secret sentence for the use of your private key
4. Choose to save the file again, in clear mode
Step 4 : Adding downloaded public keys (PGP)
Double-click on the .asc file (the one having the keys in question) and choose, with the window that
opens, the keys that you wish to import.
The two other functions of PGP (destroying and cleaning unused space) are not of any use to
cryptography. The first one is used to to destroy files, and the second one to clean your
disk space. We can now move on to the GPG user manual.
GPG, the free alternative to PGP
GnuPG is the free alternative to PGP, under GPL license. GnuPG is considered as safe and
implements PGP's functions. GPG is available for both Linux and Windows on the
http://www.gnupg.org website. For our demonstration, we will use GPG on Linux. The first necessary
step is to create a pair of cryptographic keys:
$ gpg --gen-key
The tool becomes interactive and allows the creation of keys step by step. Please note that, as
presented, we can specify a key size above 2048 bits. The keys are generated in the most random
way possible, using factors such as the movements of the mouse, the keyboard entries, etc.
The Hackademy DMP -191/209- SYSDREAM