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Cryptography for Quantum States
Colloquium| Speaker: | Dr. Daniel Gottesman, University of California, Berkeley |
| Location: | 693 Kerr |
| Start time: | Mon, Feb 11 2002, 4:00PM |
Description
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.