Victor: "humble, poor" man who lived circa 500 AD, who is still remembered today thanks to his ingenious use of cryptography.

From The Codebreakers, by David Kahn, p. 86:

"At the Coptic monastery of St. Jeremias in Saqqara, Egypt, perhaps just before it was abandoned in the late 6th century AD, a man enciphered a message in monalphabetic substitution and scratched it on the wall inside the door to a courtyard in a curious bid for immortality.

'In the name of God before all things', the inscription calls beseechingly across the centuries, "I, Victor, the humble poor man - remember me!'"