All reports by Author Ran Canetti:

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TR01-050
| 24th June 2001
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Ran Canetti, Joe Kilian, Erez Petrank, Alon Rosen#### Black-Box Concurrent Zero-Knowledge Requires $\tilde\Omega(\log n)$ Rounds

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TR01-016
| 22nd December 2000
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Ran Canetti#### A unified framework for analyzing security of protocols

Revisions: 6

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TR99-042
| 24th October 1999
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Ran Canetti, Oded Goldreich, Silvio Micali.#### Resettable Zero-Knowledge.

Revisions: 1

Ran Canetti, Joe Kilian, Erez Petrank, Alon Rosen

We show that any concurrent zero-knowledge protocol for a non-trivial

language (i.e., for a language outside $\BPP$), whose security is proven

via black-box simulation, must use at least $\tilde\Omega(\log n)$

rounds of interaction. This result achieves a substantial improvement

over previous lower bounds, and is the first bound to rule ...
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Ran Canetti

Building on known definitions, we present a unified general framework for

defining and analyzing security of cryptographic protocols. The framework

allows specifying the security requirements of a large number of

cryptographic tasks, such as signature, encryption, authentication, key

exchange, commitment, oblivious transfer, zero-knowledge, secret sharing,

general function evaluation, and ...
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Ran Canetti, Oded Goldreich, Silvio Micali.

We introduce the notion of Resettable Zero-Knowledge (rZK),

a new security measure for cryptographic protocols

which strengthens the classical notion of zero-knowledge.

In essence, an rZK protocol is one that remains zero knowledge

even if an adeversary can interact with the prover many times, each

time ...
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