cypherspace.org (Adam Back)

Adam Back's personal site, first hosted at the University of Exeter, with his pages on Hashcash and on the RSA-in-Perl signature that U.S. export rules treated as a munition.

1999

2 entries

Event January 28, 1999 Added October 3, 2026 Updated October 3, 2026 Web Document

Adam Back, 'export-a-crypto-system sig': RSA in three lines of Perl

Adam Back

Back's page for his RSA program in Perl, small enough for an e-mail signature, which a U.S. Commerce Department statement ruled must not be exported, and which went onto T-shirts and tattoos.

Event January 16, 1999 Added October 3, 2026 Updated October 3, 2026 Web Document

Adam Back, 'The quest for the most diminutive munitions program': the RSA-in-Perl versions from 1995

Adam Back ↔ Hal Finney

Back lists the shrinking versions of his RSA-in-Perl program, smallest first, back to the five-line original of March 9, 1995, which Hal Finney explained on the Cypherpunks list soon after.