Any agency wanting to read PGP messages would probably use easier means than standard cryptanalysis, e. g. rubber-hose cryptanalysis or black-bag cryptanalysis i. e. installing some form of trojan horse or keystroke logging software / hardware on the target computer to capture encrypted keyrings and their passwords.

Additionally, a judge ruling on the same case in November 2007 has stated that forcing the suspect to reveal his PGP passphrase would violate his Fifth Amendment rights i. e. a suspect's constitutional right not to incriminate himself.

Because of PGP encryption's importance worldwide ( it is thought to be the most widely chosen quality cryptographic system ), many wanted to write their own software that would interoperate with PGP 5.

On April 29, 2010 Symantec Corp. announced that it would acquire PGP for $ 300 million with the intent of integrating it into its Enterprise Security Group.

Although PGP keys are generally used with personal computers for Internet-related applications, key signing parties themselves generally do not involve computers, since that would give adversaries increased opportunities for subterfuge.

In late 1986, Bud Orr created the original Sniper pump marker by carving the works of a standard Sheridan PGP into an aluminum block that would accept a longer barrel.

Viacrypt, thus, created a new version ( based on PGP 2 ) that they called PGP 4.

PGP and the SSL / TLS family of schemes use this procedures, and are thus called hybrid cryptosystems.

This contrasts with web of trust models, like PGP, where anyone ( not just special CAs ) may sign and thus attest to the validity of others ' key certificates.

Software applications such as GnuPG or PGP can be used to encrypt data files and Email.

IDEA was used in Pretty Good Privacy ( PGP ) v2. 0, and was incorporated after the original cipher used in v1. 0, BassOmatic, was found to be insecure.

PGP can be used to send messages confidentially.

In PGP, these are used by default in conjunction with encryption, but can be applied to the plaintext as well.

In addition to protecting data in transit over a network, PGP encryption can also be used to protect data in long-term data storage such as disk files.

Likewise, the symmetric key algorithm used in PGP version 2 was IDEA, which might, at some future time, be found to have a previously unsuspected cryptanalytic flaw.

PGP encryption no longer meets the definition of a non-exportable weapon, and can be exported internationally except to 7 specific countries and a list of named groups and individuals ( with whom substantially all US trade is prohibited under various US export controls ).

To remove confusion about how it could be that PGP 3 was the successor to PGP 4, PGP 3 was renamed and released as PGP 5 in May 1997.

In July 1997, PGP Inc. proposed to the IETF that there be a standard called OpenPGP.

While originally used primarily for encrypting the contents of e-mail messages and attachments from a desktop client, PGP products have been diversified since 2002 into a set of encryption applications which can be managed by an optional central policy server.

be: PGP

Associating a public key with its owner is typically done by protocols implementing a public key infrastructure-these allow the validity of the association to be formally verified by reference to a trusted third party in the form of either a hierarchical certificate authority ( e. g., X. 509 ), a local trust model ( e. g. SPKI ), or a web of trust scheme ( e. g. like that originally built into PGP and GPG, and still to some extent usable with them.

Although the parties had access to far better encryption techniques ( Karim himself used PGP for data storage on computer disks ), they chose to use their own scheme instead ( implemented in Microsoft Excel ) " because ' kaffirs ', or non-believers, know about it PGP so it must be less secure ".

For example, the encryption software PGP can be used to secure communications ; PGP's author, Phil Zimmermann said he distributed it first to the peace movement.

OpenPGP-compliant implementations also include a vote counting scheme which can be used to determine which public key – owner association a user will trust while using PGP.

Preimplantation genetic profiling ( PGP ) has been suggested to be applied as a method of assisted reproductive technology to perform embryo selection of an embryo that appears to have the greatest chances for successful pregnancy.

However, as the results of PGP rely on the assessment of a single cell, PGP has inherent limitations as the tested cell may not be representative of the embryo because of mosaicism.

To the best of publicly available information, there is no known method which will allow a person or group to break PGP encryption by cryptographic or computational means.

The source code of PGP Desktop 10 is available for peer review.

: This section describes commercial programs available from PGP Corporation.

Also available are PGP Command Line, which enables command line-based encryption and signing of information for storage, transfer, and backup, as well as the PGP Support Package for BlackBerry which enables RIM BlackBerry devices to enjoy sender-to-recipient messaging encryption.

In 1991, he wrote the popular Pretty Good Privacy ( PGP ) program, and made it available ( together with its source code ) through public FTP for download, the first widely available program implementing public-key cryptography.

A significant one was the PGP plugin because it was the only example of a working plugin whose source code was available ( licensed under GPL ).

Other products of historical significance are PGPfone and Nautilus ( designed as a non-backdoored alternative to Clipper, now officially discontinued, but still available on SourceForge ), SpeakFreely, and the security VoIP protocol wrapper Zfone developed by the creator of PGP.

Originally written in 1991, Pretty Good Privacy ( PGP ) was one of the first freely and publicly available implementations of public-key cryptography.

PGP found its way onto the Internet, and it very rapidly acquired a considerable following around the world.

Philip R. " Phil " Zimmermann Jr. ( born February 12, 1954 ) is the creator of Pretty Good Privacy ( PGP ), the most widely used email encryption software in the world.

( According to the PGP FAQ, the US patent expired on May 25, 2010.

Pretty Good Privacy ( PGP ) is a data encryption and decryption computer program that provides cryptographic privacy and authentication for data communication.

PGP is often used for signing, encrypting and decrypting texts, e-mails, files, directories and whole disk partitions to increase the < nowiki > security </ nowiki > of e-mail communications.

PGP and similar products follow the OpenPGP standard ( RFC 4880 ) for encrypting and decrypting data.

PGP encryption uses a serial combination of hashing, data compression, symmetric-key cryptography, and, finally, public-key cryptography ; each step uses one of several supported algorithms.

The first version of this system was generally known as a web of trust to contrast with the X. 509 system, which uses a hierarchical approach based on certificate authority and which was added to PGP implementations later.

Current versions of PGP encryption include both options through an automated key management server.

As PGP evolves, PGP that support newer features and algorithms are able to create encrypted messages that older PGP systems cannot decrypt, even with a valid private key.

Thus, it is essential that partners in PGP communication understand each other's capabilities or at least agree on PGP settings.

For this, PGP combines symmetric-key encryption and public-key encryption.

PGP supports message authentication and integrity checking.

The sender uses PGP to create a digital signature for the message with either the RSA or DSA signature algorithms.

To do so, PGP computes a hash ( also called a message digest ) from the plaintext, and then creates the digital signature from that hash using the sender's private key.

PGP has, from its first versions, always included provisions for distributing a user's public keys in an ' identity certificate ' which is also constructed cryptographically so that any tampering ( or accidental garble ) is readily detectable.

From its first release, PGP products have included an internal certificate ' vetting scheme ' to assist with this ; a trust model which has been called a web of trust.