منابع مشابه
DNStamp: Short-lived Trusted Timestamping
*The extended version of this work is to appear in Elsevier Computer Networks 64 (2014) pp. 208-224. ABSTRACT Trusted timestamping consists in proving that certain data existed at a particular point in time. Existing timestamping methods require either a centralized and dedicated trusted service or the collaboration of other participants using the timestamping service. We propose a novel truste...
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متن کاملLong-lived digital integrity using short-lived hash functions
New collision-finding attacks on widely used cryptographic hash functions raise questions about systems that depend on certain properties of these functions for their security. Even after new and presumably better hash functions are deployed, users may have digital signatures and digital time-stamp certificates that were computed with recently deprecated hash functions. Is there any way to use ...
متن کاملShort-lived Teams with Mutual Monitoring∗
We show that the free-riding problem in short-lived teams is not as severe as previously thought. Two critical conditions are: team members can observe each other’s effort periodically, which makes mutual monitoring possible; technology is convex (increasing marginal returns) or has a “completion benefit.” In principal-agent settings, mutual monitoring reduces the necessary wage payment to indu...
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ژورنال
عنوان ژورنال: Canadian Medical Association Journal
سال: 2009
ISSN: 0820-3946,1488-2329
DOI: 10.1503/cmaj.109-3046