Edu
Cryptography, part 2: steganography
An encrypted message gets noticed. A well-hidden one does not. Steganography through a story from Herodotus: a slave, a shaved head and a revolt.
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Tag: history
Edu
Cryptography, part 1: from secret art to Caesar's cipher
Before it was mathematics, cryptography was an art for initiates. Start with Caesar and ROT13, with three puzzles to solve with pen and paper.
Edu
Hedera Network
CBK, the token CoinBack uses to reward your purchases, lives on the Hedera network.