The Monk’s Cipher

Prof Bill Buchanan OBE
Jul 6 · 1 min read

Could you come up with a graphical representation of a number, but where you can only use a single character? Well the European monks of the Middle Ages did this with a single character and with strokes to represent the digits. We then have a vertical straight line and then builds on the digit:

The digits from 0–9 appear in the top right hand corner. For the 10s, they appear in the top left hand corner, and so on:

Now go solve this one:

ASecuritySite: When Bob Met Alice

This publication brings together interesting articles related to cyber security.

Prof Bill Buchanan OBE

Written by

Prof at Napier. Serial innovator. Crypto Punk. Believer in fairness, justice & freedom. EU Citizen. Auld Reekie native. Old World Breaker. New World Creator.

ASecuritySite: When Bob Met Alice

This publication brings together interesting articles related to cyber security.

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