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SUMMARY:Practical quantum tokens without quantum memories: towards a proof
 -of-principle experimental demonstration - Damian Pitalua-Garcia (CQIF\, D
 AMTP\, University of Cambridge)
DTSTART:20200213T163000Z
DTEND:20200213T170000Z
UID:TALK139738@talks.cam.ac.uk
CONTACT:Adrian Kent
DESCRIPTION:In contrast to existing quantum money schemes\, S-money tokens
  are\npractical to implement with current technology by not requiring quan
 tum\nmemories. We present practical S-money protocols extending previous\n
 protocols to a realistic setting considering losses\, errors\, etc. For\ns
 uitable experimental parameters\, our schemes satisfy\, unforgeability\,\n
 i.e. Alice cannot make Bob validate a token at more than one\npresentation
  point\, and future privacy\, i. e. Bob cannot know where\nAlice will pres
 ent the token. We performed experimental tests of the\nquantum communicati
 on stage using hand-held optical devices and showed\nthe viability of our 
 schemes after refining our setup.
LOCATION:MR21\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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