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Pretty Good Privacy

Not to be confused with GNU Privacy Guard (GPG).

Pretty Good Privacy
Original author(s)
Developer(s)Broadcom Inc.
Initial release1991; 34 years ago (1991)
Stable release
11.4.0 Maintenance Pack 2 / May 23, 2023; 20 months ago (2023-05-23)[2]
Written inC
Operating systemmacOS, Windows[3]
Standard(s)
  • OpenPGP: RFC 4880, 5581, 6637, 9580
  • PGP/MIME: RFC 2015, 3156
TypeEncryption software
LicenseCommercial proprietary software
Websitewww.broadcom.com/products/advanced-threat-protection/encryption Edit this on Wikidata

Pretty Good Privacy (PGP) is an encryption program that provides cryptographic privacy and authentication for data communication. 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. Modern versions of PGP are interoperable with GnuPG and other OpenPGP-compliant systems.[5]

The OpenPGP standard has received criticism for its long-lived keys and steep learning curve,[6] as well as the Efail security vulnerability that previously arose when select e-mail programs used OpenPGP with S/MIME.[7][8] The new OpenPGP standard (RFC 9580) has also been criticised by the maintainer of GnuPG Werner Koch, who in response created his own specification LibrePGP.[9] This response was dividing, with some embracing his alternative specification,[10] and others considering it to be insecure.[11]

  1. ^ "Where to Get PGP". philzimmermann.com. Phil Zimmermann & Associates LLC. February 28, 2006. Archived from the original on February 26, 2014. Retrieved March 10, 2016.
  2. ^ "Symantec Endpoint Encryption 11.4.0 Maintenance Pack 2 Release Notes". techdocs.broadcom.com. Archived from the original on October 5, 2024. Retrieved February 16, 2024.
  3. ^ "System requirements for Symantec Endpoint Encryption Client". techdocs.broadcom.com. Archived from the original on October 5, 2024. Retrieved February 16, 2024.
  4. ^ Zimmermann, Philip R. (1999). "Why I Wrote PGP". Essays on PGP. Phil Zimmermann & Associates LLC. Archived from the original on June 24, 2018. Retrieved July 6, 2014.
  5. ^ "Gnu Privacy Guard". GnuPG.org. Archived from the original on April 29, 2015. Retrieved May 26, 2015.
  6. ^ Latacora (July 16, 2019). "The PGP Problem". Retrieved November 22, 2024.
  7. ^ "Efail: Breaking S/MIME and OpenPGP Email Encryption using Exfiltration Channels" (PDF).
  8. ^ Yen, Andy (May 15, 2018). "No, PGP is not broken, not even with the Efail vulnerabilities". Proton. Retrieved January 22, 2025.
  9. ^ Cite error: The named reference LibrePGP was invoked but never defined (see the help page).
  10. ^ Tse, Ronald; Olshevsky, Nickolay (July 22, 2024). "RNP proudly supports LibrePGP". RNP. Retrieved January 22, 2025.
  11. ^ Gallagher, Andrew (September 11, 2024). "A Summary of Known Security Issues in LibrePGP". Retrieved January 22, 2025.
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