RSA - Rivest, Shamir, and Adleman
- First popular PKI system - used by PGP
- Patent issues (now expired) kept it out of GPG
- American NSA attempt to stop publication - RSA ignore the NSA
- Americans place export restrictions on RSA
- PGP (including RSA) hosted on public ftp servers by MIT (part holders of RSA patent)
- Phil Zimmerman, author of PGP, faces patent suits from RSA and criminal investigation by government
- MIT and PZ publish `PGP Internals' book with entire source
in OCR font and page numbers in /* */ - available around the
world
- Investigations eventually dropped and ineffective export restrictions finally lifted 16 September 1999
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