Cyber Threat Intelligence perspectives on 2025
Multivariate signatures based on identification schemes
Leon Battista Alberti’s cipher disk, described in “De cifris” around 1467, is the first polyalphabetic encryption system. The device consists of two concentric discs, rotating relative to each other, containing...
In cryptography, the Caesar cipher is one of the oldest cryptographic algorithms of which there is a historical trace. It is a mono-alphabetic substitution cipher, in which each letter of...
The scitala or scital (in ancient Greek: σκυτάλη, skytàlē, “stick”) is traditionally considered an encrypted and secret message that was sent by the ephors, the five supreme magistrates of Sparta,...
