Prtty Gd Prvcy (PGP) s n ncryptn prgrm tht prvds cryptgrphc prvcy nd thntctn fr dt cmmnctn. PGP s sd fr sgnng, ncryptng, nd dcryptng txts, -mls, fls, drctrs, nd whl dsk prttns nd t ncrs th scrty f -ml cmmnctns. Phl Zmmrmnn dvlpd PGP n 1991.
PGP nd smlr sftwr fllw th pnPGP stndrd (RFC 4880), n pn stndrd fr ncryptng nd dcryptng dt. Mdrn vrsns f PGP r ntrprbl wth GnPG nd thr pnPGP-cmplnt systms.