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In a recent paper, [Phys. Rev. A 65, 052326 (2002)], Mihara presented severalcryptographic protocols that were claimed to be quantum mechanical in nature.In this comment it is pointed out that these protocols can be described inpurely classical terms. Hence, the security of these schemes does not rely onthe usage of entanglement or any other quantum mechanical property.Comment: 2 pages, revtex

Comment on “Quantum identification schemes with entanglements”