![]() ![]() When you want to send an encrypted message to someone, you use their public key to encrypt it. This key is used specifically to transform the original data into an encrypted form, making it unreadable to anyone who does not possess the corresponding private key. It is one half of two cryptographically linked keys in the PGP encryption system. The public key, as the name suggests, is publicly accessible and can be shared openly without compromising security. In addition, PGP encryption uses 128-bit keys, making it incredibly secure and difficult to crack. This ensures that even if someone else intercepts the message, they will not be able to understand it without the private key. The encrypted message can only be decrypted by the recipient using their private key. To use PGP encryption, the sender creates a message and then uses the recipient's public key to encrypt it. This is where PGP really shines with its two key system - a public and a private key - to encrypt and decrypt messages allowing users to send secure and encrypted messages to people they've never met or communicated with before. Sending secret notes to your friend sounds like a great idea, but how do you let them know what the code is prior to receiving the message? You can't send the information along with the note, it would defeat the purpose of encoding it but without the code, your friend would have no idea what your message was. Zimmermann, PGP is a sophisticated, digital version of your childhood method of sending encoded notes, ensuring that only the intended recipient can understand the message, even if someone else intercepts it. The public key is like the special code you and your friend shared, while the private key is your friend's unique ability to decipher the messages.Ĭreated in 1991 by Philip R. Just as you and your friend had a secret way to decode your messages, PGP uses a pair of keys - a public key to encode the data and a private key to decode it. Simply put, Pretty Good Privacy (PGP) is a data encryption and decryption system that provides cryptographic privacy and authentication for data communication. Instead of a simple letter-shifting code, PGP uses complex mathematical algorithms to encode your data. In the digital world we use Pretty Good Privacy for encrypting emails and other data, similar to the notes you used to pass to your friend. With this secret code, you and your friend could communicate without others easily deciphering your messages. You likely used a simple code such as replacing each letter with the one that comes three letters after it in the alphabet (a becomes d, b comes e, and so on). As a kid, you likely wanted to send secret messages to a friend without anyone else (or your teacher) being able to understand the message.
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