# onthisday

Polygraphiae (1518) by Johannes Trithemius, the first printed book on cryptography (secure communication).
📖https://t.co/Bpf99611lf

71 137
2018-09-02

Polygraphiae (1518), the first printed book on cryptography by Johannes Trithemius.
Trithemius died on this day in 1516.

159 292
2016-12-14

Polygraphiae by Johannes Trithemius (1518), the first printed book on Cryptography (secure communication).

159 199
2016-04-05

Polygraphiae (1518) by Johannes Trithemius. The first printed book on cryptography.
He was born in 1462.

161 211
2015-02-01

Our next issue "Futures of the Past" launches this July with on the invention of wireless

6 10
2014-06-22

Can you keep a secret? Fab cover by for our quantum cryptography piece http://t.co/YTWuYzxfLB

1 1
2014-03-27

A Quantum Cryptography

7 13
2013-01-11