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Cryptography for Quantum States


Speaker: Dr. Daniel Gottesman, University of California, Berkeley
Location: 693 Kerr
Start time: Mon, Feb 11 2002, 4:00PM

Someday, quantum states may be as valuable as classical data can be today. When that time comes, we will want to protect them in the same ways as we protect classical states. I will describe ways to perform various cryptographic tasks on quantum data with unconditional security. The notions of encryption and authentication (which proves a state has not been changed) are much more closely associated than they are for classical data. I will also discuss the notion of quantum secret sharing, in which a quantum state is split among many people so that small groups cannot learn anything about the state while larger groups can get full information.