Jack Minker (auth.), Dino Pedreschi, Carlo Zaniolo (eds.)'s Logic in Databases: International Workshop LID '96 San PDF

By Jack Minker (auth.), Dino Pedreschi, Carlo Zaniolo (eds.)

ISBN-10: 3540618147

ISBN-13: 9783540618140

This ebook constitutes the strictly refereed post-workshop complaints of the foreign Workshop on common sense in Databases, LID'96, held in San Miniato, Italy, in July 1996, because the ultimate assembly of an EC-US cooperative activity.
The quantity provides 21 revised complete papers chosen from forty nine submissions in addition to three invited contributions and a precis of a panel dialogue on deductive databases: demanding situations, possibilities and destiny instructions. The retrospective survey on common sense and databases by way of Jack Minker merits a different point out: it's a 56-page evaluate and lists 357 references. The papers are geared up in sections on uncertainty, temporal and spatial reasoning, updates, energetic databases, semantics, complicated purposes, question assessment, language extensions, and good judgment constructs and expressive power.

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Additional info for Logic in Databases: International Workshop LID '96 San Miniato, Italy, July 1–2, 1996 Proceedings

Example text

The EOR allows A to prove that B did indeed receive M , whilst the EOO allows B to prove that it was A who sent M . The protocol consists of three sub-protocols: Main protocol. Agent A wants to send M to B, using TTP for session abort or resolution. Initially, A chooses a fresh key K. The main protocol is: 1. A → B : {M }K , EOOM for EOOM = (B, TTP, h({M }K ), {K, A}TTP)A 2. B → A : EORM for EORM = (EOOM )B 3. A → B : K 4. B → A : EORK for EORK = (A, h({M }K ), K)B First A sends {M }K , along with EOOM , which consists of B and TTP’s identities, a commitment to send M using K in the form of a hash h({M }K ), and K encrypted with the TTP’s public key (along with A’s identity) in case the session is later resolved.

From (1) and (2) we have ˜ , P K) = e(˜ e(V˜ − V˜ , P ) = e(U v X, zY ) = e(X, Y )v˜z , and thus (˜ v z)−1 (V˜ − V˜ ) is the solution to the CDH instance (X, Y ) ∈ G1 × G1 . Assume that a PPT verifier Bob has an advantage ε in forging a signature in an attack modelled by the game of section 2, when running in a suitable time and asking qHi queries to random oracles Hi (i = 1, 2), qE queries to the key extraction oracle, qS queries to the verifiable partial signature oracle, and qRes queries to the resolution oracle.

The formalization of the protocol described in Section 2 is carried out in µCRL [12]. The µCRL toolset includes an automatic state space generator and symbolic state space reduction tools. The fair exchange properties are expressed in the regular alternation-free µ-calculus [16]. 0 [16] from the CADP tool set [9] is then used to verify these properties. 3 Intruder Models We use two different intruder models. For safety properties the normal Dolev-Yao intruder [8] is used. As mentioned earlier, this intruder is not suitable for verification of liveness properties [17], so to verify termination we use the intruder suggested in [6].

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Logic in Databases: International Workshop LID '96 San Miniato, Italy, July 1–2, 1996 Proceedings by Jack Minker (auth.), Dino Pedreschi, Carlo Zaniolo (eds.)


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