To increase the security and integrity of an email account and its contents, you should use PGP on your Windows, Mac OS or Linux computer. This is usually the first thing security analysts do to protect communication with encryption, and everyone else should think about it, especially since there is an easy way to implement PGP that anyone can understand.
PGP stands for the uninitiated for Pretty Good Privacy an encryption program that creates encryption, signing and decryption of text, files, emails or entire disks. PGP uses a variety of hash techniques, data compression, symmetric key cryptography, and public key encryption to encrypt and decrypt data.
We will use the asymmetric encryption method. Using the asymmetric method, you create a public and private key and then download the public keys of the people you want to communicate with. If you use your public key, use it to encrypt an email to it, and then use your private key, which is mathematically linked to your public key, to automatically decrypt the message.
It works the other way too. Someone uses your public key to encrypt an email, sends it to you, and then decrypts it with your private key. To do this, we need to set up PGP with our current email account and then upload our public keys online to a central location so that other users can find them. Alternatively, you can also share the public key privately so that it is used by one person only.
: Download and Install the E-Mail Client
First, we use Thunderbird as our e-mail client. To install it on Windows or Mac OS, just visit the Thunderbird website and click on the "Free Download" button, which will either download an EXE or DMG file. Once downloaded, open the file and install it like any other app you would download from the internet.
It's even easier on a Linux computer. Just open a root terminal and use the command apt-get below. Then follow the instructions on the screen to complete the installation.
apt-get install thunderbird
Step 2: Install the PGP add-on
After the e-mail client has been installed, you must configure an e-mail address. Open Thunderbird, and when prompted to receive a new email address, select "Skip and use my existing email address." If this popup does not appear, you should immediately see an option to create or set up a new email account, so select the popup.
Alternatively, you can click the top of the three-line icon on the right, select "Settings," then "Account Settings." You will see a drop-down for "Account activity", click on it and select "Add e-mail account".
Next, a small window appears for Mail Account Setup Enter your email address and password in the appropriate fields, select "Next" and follow the instructions on the screen, to finish adding your email account.
Now Remember to share your public key and never your private key because the public key is used for encryption while the private one is used for the decryption part, also make sure that the receiver is performing the same steps as the public key must be downloaded.
Now others have your public key send encrypted messages, but you can not send them encrypted messages yet. Make sure you use PGP and have your public key uploaded to a server or sent directly to your server to add to the list of keys.
To download another person's public key from the server, go back to the "Key Management" menu for Enigmail in Thunderbird, then click the "Keyserver" tab and select "Search for Keys." Type in pop -up window, enter the recipient's e-mail address in the Search for key field and click "OK". The public key is added to your key manager.
If you import a file instead, select "File" in the "Key Management" window to find the option " Import key from file ". Select it, find the file and open it. Done
Next, you should write an email to test and then encrypt. Click the "Write" button in the top quick access bar for your Thunderbird email account to open a window to compose your email.
You can now send only encrypted messages to your recipient if you have downloaded the public key. If you want to send an encrypted message to more than one person, you must download all public keys.
After entering the recipient's e-mail address in the To field, the bar will show a lock icon above. If the lock is displayed in full color with a green check mark, your message will automatically be with that person encrypted. If it contains a red X, just send them a normal, unencrypted email.
If someone sends you an email this way, they will is automatically decrypted when opened because the public key that encrypted it is mathematically linked to your private key. The same applies to your recipient who opens your e-mail at the end of it – it automatically decrypts as long as you have sent it with his public key.
Whether you send pictures to a loved one or send a confidential message to someone. You can use this encryption software to verify that your message has been sent without interruption.