12/26/2023 0 Comments Gnu privacy guard![]() You use GnuPG and the private key to decode the encrypted letters that other people send you. Your private key resembles more with a physical key, because you are the one having it (holding it on your computer). You can think of the key server as a phonebook where people who want to send you an encrypted letter look for your public key. People download it and use it, along with GnuPG, to encrypt the letters they are sending. Your public key does not resemble a physical key because it is kept in sight in an internet catalog called a key server. Your public and private keys are linked together by a special mathematical function. Each is a long string of random numbers and letters that are unique to you. To use the GnuPG system, you will need a public key and a private key (commonly known as the “key pair”). If a user manages to change the public key of another user, then he can sign and decrypt the messages instead of the real person. The exchange of keys should be done carefully so that the public keys don’t change from one user to another. ![]() Also, through the signature received in an email, users can verify the identity of the user and whether the message is the original one. By knowing the public key of a person, users can send messages that only the recipient can open. A person will make his key publicly known to others. Users can exchange keys in different ways, for example using Internet key servers. GnuPG encrypts messages using asymmetric key pairs individually generated by GnuPG users. GnuPG can be compiled by many operating systems. ![]() It is often included in free operating systems, such as FreeBSD, OpenBSD and NetBSD, and almost all Linux distributions. The current versions of PGP (and Filecrypt of Veridis) are interoperable with GnuPG and other OpenPGP compliant systems. GnuPG fully complies with RFC 4880, the IETF standard for OpenPGP. It is part of the GNU All Free Software Foundation project, and it has received important funding from the German government. The GNU Privacy Guard ( GnuPG or GPG) is a free replacement for the PGP Cryptographic Suite, licensed under the GPL v3 license.
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