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Some quantum cryptographic protocols can be implemented with speciallyprepared chocolate balls, others protected by value indefiniteness cannot.Similarities and differences of cryptography with quanta and chocolate arediscussed. Motivated by these considerations it is proposed to certify quantumrandom number generators and quantum cryptographic protocols by valueindefiniteness. This feature, which derives itself from Bell- andKochen-Specker type arguments, is only present in systems with three or moremutually exclusive outcomes.

Bertlmann's chocolate balls and quantum type cryptography