APSS: proactive secret sharing in asynchronous systems

  • Authors:
  • Lidong Zhou;Fred B. Schneider;Robbert Van Renesse

  • Affiliations:
  • Microsoft Research Silicon Valley, Mountain View, CA;Cornell University, Ithaca, New York;Cornell University, Ithaca, New York

  • Venue:
  • ACM Transactions on Information and System Security (TISSEC)
  • Year:
  • 2005

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Abstract

APSS, a proactive secret sharing (PSS) protocol for asynchronous systems, is explained and proved correct. The protocol enables a set of secret shares to be periodically refreshed with a new, independent set, thereby thwarting mobile-adversary attacks. Protocols for asynchronous systems are inherently less vulnerable to denial-of-service attacks, which slow processor execution or delay message delivery. So APSS tolerates certain attacks that PSS protocols for synchronous systems cannot.