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DTSTART:20260308T070000
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DTSTART:20251102T060000
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DTSTART;TZID=America/Toronto:20260320T103000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/crypto-readi
 ng-group-pranshu-kumar-generic-transformations
SUMMARY:Crypto Reading Group - Pranshu Kumar-Generic Transformations for\nU
 pdatable PKEs
CLASS:PUBLIC
DESCRIPTION:SPEAKER:\n\n Pranshu Kumar\n\nAFFILIATION:\n University of Wate
 rloo\n\nLOCATION:\n MC 6029\n\nABSTRACT:Updatable Public-Key Encryption (U
 PKE) augments the security\nof PKE with Forward Secrecy properties. It was
  originally proposed by\nJost et al. (EUROCRYPT 2019) to provide security 
 guarantees in secure\nmessaging applications efficiently. Later\, Alwen et
  al. (CRYPTO 2020)\nshowed that TreeKEM\, when used for Continuous Group K
 ey Agreement\n(CGKA) in Message Layer Security (MLS)\, failed to achieve a
 dequate\nsecurity and proposed using UPKEs to modify TreeKEM. Since then\,
  UPKEs\nhave become a part of the Message Layer Security specification\, a
 nd\ntheir security properties have been extensively studied. Alwen\,\nFuch
 sbauer\, and Mularczyk (AFM\, Eurocrypt’24) presented the\nstrongest sec
 urity notion to date\, adding many additional properties\nthat strengthen 
 its security in CGKA and MLS.
DTSTAMP:20260417T012755Z
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