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PGP is used for signing, encrypting, and decrypting texts, e-mails, files, directories, and whole disk partitions and to increase the security of e-mail communications. Phil Zimmermann developed PGP in 1991. [4] PGP and similar software follow the OpenPGP standard (RFC 4880), an open standard for encrypting and decrypting data.
All OpenPGP-compliant implementations include a certificate vetting scheme to assist with this; its operation has been termed a web of trust. OpenPGP certificates (which include one or more public keys along with owner information) can be digitally signed by other users who, by that act, endorse the association of that public key with the person or entity listed in the certificate.
In an asymmetric key encryption scheme, anyone can encrypt messages using a public key, but only the holder of the paired private key can decrypt such a message. The security of the system depends on the secrecy of the private key, which must not become known to any other.
SSL (Secure Sockets Layer) is an industry standard for encrypting private data sent over the Internet to help protect your account and information. Learn what SSL is and how we use it to protect your account.
The app allows the user to store the public keys of other users with whom they interact, and to encrypt files such that only a specified user can decrypt them. In the same manner, if a file is received from another user and its public keys are saved, the receiver can verify the authenticity of that file and decrypt it if necessary.
PGP Corporation (acquired by Symantec in 2010) 1998-09-01 [25] Proprietary: Yes Private Disk: Dekart 1993 [26] Proprietary: Yes ProxyCrypt v77 2013 Open source: Yes R-Crypto R-Tools Technology Inc 2008 Proprietary: Yes SafeGuard Easy Sophos (Utimaco) 1993 [27] Proprietary: Yes SafeGuard Enterprise Sophos (Utimaco) 2007 [28] Proprietary: Yes ...
Starting with versions 1.4.13 and 2.0.20, GnuPG supports IDEA because the last patent of IDEA expired in 2012. Support of IDEA is intended "to get rid of all the questions from folks either trying to decrypt old data or migrating keys from PGP to GnuPG", [10] and hence is not recommended for regular use.
In PGP, normal users can issue certificates to each other, forming a web of trust, and fingerprints are often used to assist in this process (e.g., at key-signing parties). In systems such as CGA or SFS and most cryptographic peer-to-peer networks , fingerprints are embedded into pre-existing address and name formats (such as IPv6 addresses ...