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UID:www.tcs.tifr.res.in/event/1247
DTSTAMP:20230914T125956Z
SUMMARY:Commitment over Unreliable Noisy Channels: When Awareness Meets Con
 trol
DESCRIPTION:Speaker: Manideep Mamindlapally\n\nAbstract: \nWe study commitm
 ents over unreliable compound noisy channels\, where parties may know the 
 compound channel state but lack control over that state. Commitment is one
  of the common building blocks for many cryptographic protocols which real
 ize multi-party computational functionalities in a secure manner. A noisy 
 channel\, among others\, is widely acknowledged as a promising resource fo
 r realizing information-theoretically secure cryptographic primitives\, in
 cluding commitment. However\, unreliable noisy channels with poorly or imp
 recisely characterized statistical behaviour can severely degrade commitme
 nt guarantees. Our focus is unreliability on account of a compound channel
  state\, albeit under public awareness of that state. Building on prior wo
 rk\, we seek to characterize the optimal commitment throughput or commitme
 nt capacity of compound binary symmetric channels when parties may be stat
 e-aware. State-awareness implies a passive and publicly known capability o
 f precise channel knowledge (whether said party is honest or dishonest)\; 
 however\, state-awareness precludes any active and private channel state c
 ontrol as in\, for instance\, the classic unfair noisy channels (UNCs). We
  present new results on the commitment capacity under all possible configu
 rations where individual parties may (or may not) be state-aware. An impor
 tant takeaway of our work is the following: even a fairly weak capability 
 of state-awareness (albeit when asymmetric and only at the committer-side)
  can degrade the commitment throughput to the same extent as under strongl
 y capable parties that can privately control the compound state.\n
URL:https://www.tcs.tifr.res.in/web/events/1247
DTSTART;TZID=Asia/Kolkata:20221028T150000
DTEND;TZID=Asia/Kolkata:20221028T160000
LOCATION:A201
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