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❮ Block Bills – 64 banknotes generated from the Bitcoin Blockchain ❯

Created by Matthias Dörfelt, ‘Block Bills’ is a series of 64 banknotes generated from the Bitcoin Blockchain. Each banknote represents one block in the chain and the whole series consist of 64 consecutive blocks starting at block #456476.

❮ Cuckoo – Encrypted communication using public social networks ❯

Created by Berlin based designer Jochen Maria Weber, Cuckoo is a communication device that uses social network as a means of private communication.