PGP: Pretty Good Privacy
Simson Garfinkel · O'Reilly & Associates · 1995
Wikipedia
{{cite book |last=Garfinkel |first=Simson |title=PGP: Pretty Good Privacy |publisher=O'Reilly & Associates |year=1995 |isbn=9781565920989}}
Simson Garfinkel · O'Reilly & Associates · 1995
{{cite book |last=Garfinkel |first=Simson |title=PGP: Pretty Good Privacy |publisher=O'Reilly & Associates |year=1995 |isbn=9781565920989}}