Journal of Computer Security - Volume 21, issue 5 - Journals

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Select this link to jump to navigation</a> <script> ga('set', 'dimension3',"Journal of Computer Security"); ga('set', 'metric2', 1 ); ga('set', 'dimension4',"Volume 21"); ga('set', 'metric3', 1 ); ga('set', 'metric4', 1 ); ga('set', 'dimension5',"Issue 5"); ga('send', 'pageview', "/Journal of Computer Security/"); </script> <script>window.latestLoadTimestamp=1732634936631;</script> <div class="block journal-overview shadow border"> <div class="journal-overview-header block"> <div class="main col"><h1>Journal of Computer Security - Volume 21, issue 5</h1></div> <span class="main col"><div class="pricing-journal"> <p>Purchase individual online access for 1 year to this journal.</p> <strong>Price: EUR 260.00</strong> <form class="add-to-cart-form" id="add-JournalId_jcs" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="JournalId_jcs" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div></span> <span class="sidebar col" data-toc="Journal of Computer Security" data-toc-url="q=s2_parent_title_id%3Ajournal-of-computer-security" data-toc-journal-uri="journals/journal-of-computer-security" data-toc-q="s2_parent_title_id:journal-of-computer-security" data-toc-journal-name="Journal of Computer Security"> <span class="p13n-toc"> <button class="btn btn-p13n save-toc open-p13n-modal">Enable new issue alert</button> </span> </span> </div> <div class="journal-info block"> <div class="main col"> <div class="journal-cover col col-1by4"> <div class="journal-cover-img"> <img id="journal-of-computer-security-image" data-mercury="image" src="/fragr/images/JCS_21.jpg" /> </div> <div id="journal-of-computer-security-data" data-mercury="full" class="journals-data">ISSN 0926-227X (P) <br />ISSN 1875-8924 (E) <dl> </dl></div> </div> <div class="journal-details col col-3by4"> <div id="journal-of-computer-security-above-fold" data-mercury="full" class="clearfix above-fold details"><p><b>Impact Factor 2024: 0.9</b></p> <p>The <i>Journal of Computer Security</i> presents research and development results of lasting significance in the theory, design, implementation, analysis, and application of secure computer systems. 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Of interest is a precise understanding of security policies through modelling, as well as the design and analysis of mechanisms for enforcing them, and the architectural principles of software and hardware systems implementing them.</p></div> <button class="btn btn-link js-toggle-handle"><span class="toggle-text-handle">Show more</span><span class="toggle-text-handle toggle-text-hide">Show less</span></button> </div> </div> <div class="sidebar col"> <div id="journal-of-computer-security-action-links" data-mercury="full" class="action-links"><a target="_blank" href="http://www.iospress.nl/recommend-this-title/?title=Journal%20of%20Computer%20Security&url=www.iospress.nl/journal/journal-of-computer-security/"></a> <a href="https://www.iospress.nl/catalog/journals/journal-of-computer-security" target="_blank">Recommend this journal </a> <a target="_blank" href="http://www.iospress.nl/journal/journal-of-computer-security/?tab=editorial-board"></a> <a 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data-p13n-title=" Special Issue: Advances in Security for Communication Networks "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs483"> Special Issue: Advances in Security for Communication Networks </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Visconti%2C+Ivan%22%29">Visconti, Ivan</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Editorial </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130483 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 599-600, 2013 </p> </div> <div class="pricing"> <a href="https://content.iospress.com:443/download/journal-of-computer-security/jcs483?id=journal-of-computer-security%2Fjcs483" class="btn btn-download btn-right get-pdf" target="_blank" data-articleid="journal-of-computer-security/jcs483" data-journal="Journal of Computer Security" data-volume="Volume 21" data-issue="Issue 5" data-article="Special Issue: Advances in Security for Communication Networks"> <i class="icon-download-alt" role="presentation"></i>Get PDF </a> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs481"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs481" data-itemid="ArticleId_jcs481"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs481" data-p13n-articleid="journal-of-computer-security/jcs481" data-p13n-title=" 5PM: Secure pattern matching "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs481"> 5PM: Secure pattern matching </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Baron%2C+Joshua%22%29">Baron, Joshua</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22El+Defrawy%2C+Karim%22%29">El Defrawy, Karim</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Minkovich%2C+Kirill%22%29">Minkovich, Kirill</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Ostrovsky%2C+Rafail%22%29">Ostrovsky, Rafail</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Tressler%2C+Eric%22%29">Tressler, Eric</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>In this paper we consider the problem of secure pattern matching that allows single-character wildcards and substring matching in the malicious (stand-alone) setting. Our protocol, called 5PM, is executed between two parties: Server, holding a text of length n, and Client, holding a pattern of length m to be matched against the text, where our notion of matching is more general than traditionally considered and includes non-binary alphabets, non-binary Hamming distance and non-binary substring matching. 5PM is the first secure expressive pattern matching protocol designed to optimize round complexity by carefully specifying the entire protocol round by round. 5PM</span> <span class="fold-elip">…</span><span class="below-fold hidden" >requires only eight rounds in the malicious (static corruptions) model. In the malicious model, 5PM requires O ( ( m + n ) k 2 ) communication complexity and O ( m + n ) encryptions, where m is the pattern length and n is the text length. Further, 5PM can hide pattern size with no asymptotic additional costs in either computation or bandwidth. </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Secure pattern matching, secure two-party computation, malicious adversary, full simulation, homomorphic encryption </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130481 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 601-625, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs481" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="ArticleId_jcs481" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs477"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs477" data-itemid="ArticleId_jcs477"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs477" data-p13n-articleid="journal-of-computer-security/jcs477" data-p13n-title=" Short blind signatures "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs477"> Short blind signatures </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Blazy%2C+Olivier%22%29">Blazy, Olivier</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Fuchsbauer%2C+Georg%22%29">Fuchsbauer, Georg</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Pointcheval%2C+David%22%29">Pointcheval, David</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Vergnaud%2C+Damien%22%29">Vergnaud, Damien</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>Blind signatures allow users to obtain signatures on messages hidden from the signer; moreover, the signer cannot link the resulting message/signature pair to the signing session. This paper presents blind signature schemes, in which the number of interactions between the user and the signer is minimal and whose blind signatures are short. Our schemes are defined over bilinear groups and are proved secure in the common-reference-string model without random oracles and under standard assumptions: CDH and the decision-linear assumption. (We also give variants over asymmetric groups based on similar assumptions.) The blind signatures are Waters signatures, which consist of 2</span> <span class="fold-elip">…</span><span class="below-fold hidden" >group elements. Moreover, we instantiate partially blind signatures, where the message consists of a part hidden from the signer and a commonly known public part, and schemes achieving perfect blindness. We propose new variants of blind signatures, such as signer-friendly partially blind signatures, where the public part can be chosen by the signer without prior agreement, 3-party blind signatures, as well as blind signatures on multiple aggregated messages provided by independent sources. We also extend Waters signatures to non-binary alphabets by proving a new result on the underlying hash function. </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Blind signatures, e-cash, WSN, mixed commitments </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130477 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 627-661, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs477" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="ArticleId_jcs477" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs480"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs480" data-itemid="ArticleId_jcs480"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs480" data-p13n-articleid="journal-of-computer-security/jcs480" data-p13n-title=" Field switching in BGV-style homomorphic encryption "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs480"> Field switching in BGV-style homomorphic encryption </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Gentry%2C+Craig%22%29">Gentry, Craig</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Halevi%2C+Shai%22%29">Halevi, Shai</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Peikert%2C+Chris%22%29">Peikert, Chris</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Smart%2C+Nigel+P.%22%29">Smart, Nigel P.</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>The security of contemporary homomorphic encryption schemes over cyclotomic number field relies on fields of very large dimension. This large dimension is needed because of the large modulus-to-noise ratio in the key-switching matrices that are used for the top few levels of the evaluated circuit. However, a smaller modulus-to-noise ratio is used in lower levels of the circuit, so from a security standpoint it is permissible to switch to lower-dimension fields, thus speeding up the homomorphic operations for the lower levels of the circuit. However, implementing such field-switching is nontrivial, since these schemes rely on the field algebraic structure for</span> <span class="fold-elip">…</span><span class="below-fold hidden" >their homomorphic properties. A basic ring-switching operation was used by Brakerski, Gentry and Vaikuntanathan, over rings of the form Z [ X ] / ( X 2 n + 1 ) , in the context of bootstrapping. In this work we generalize and extend this technique to work over any cyclotomic number field, and show how it can be used not only for bootstrapping but also during the computation itself (in conjunction with the “packed ciphertext” techniques of Gentry, Halevi and Smart). </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Homomorphic encryption, ring-LWE </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130480 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 663-684, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs480" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="ArticleId_jcs480" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs478"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs478" data-itemid="ArticleId_jcs478"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs478" data-p13n-articleid="journal-of-computer-security/jcs478" data-p13n-title=" A more efficient computationally sound non-interactive zero-knowledge shuffle argument "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs478"> A more efficient computationally sound non-interactive zero-knowledge shuffle argument </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Lipmaa%2C+Helger%22%29">Lipmaa, Helger</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Zhang%2C+Bingsheng%22%29">Zhang, Bingsheng</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>We propose a new non-interactive perfect zero-knowledge (NIZK) shuffle argument that, when compared with the only previously known efficient NIZK shuffle argument by Groth and Lu, has a small constant factor times smaller computation and communication, and is based on more standard computational assumptions. Differently from Groth and Lu who only prove the co-soundness of their argument under purely computational assumptions, we prove computational soundness under a necessary knowledge assumption. We also present a general transformation that results in a shuffle argument that has a quadratically smaller common reference string (CRS) and a small constant factor times longer argument than</span> <span class="fold-elip">…</span><span class="below-fold hidden" >the original shuffle. This can be interpreted as a general technique of decreasing the offline cost of an arbitrary shuffle argument. </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Bilinear pairings, Clos network, cryptographic shuffle, non-interactive zero-knowledge, progression-free sets </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130478 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 685-719, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs478" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="ArticleId_jcs478" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs485"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs485" data-itemid="ArticleId_jcs485"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs485" data-p13n-articleid="journal-of-computer-security/jcs485" data-p13n-title=" Black-box construction of a more than non-malleable CCA1 encryption scheme from plaintext awareness "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs485"> Black-box construction of a more than non-malleable CCA1 encryption scheme from plaintext awareness </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Myers%2C+Steven%22%29">Myers, Steven</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Sergi%2C+Mona%22%29">Sergi, Mona</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22shelat%2C+abhi%22%29">shelat, abhi</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>We construct a Non-Malleable Chosen Ciphertext Attack (NM-CCA1) encryption scheme from any encryption scheme that is also plaintext aware and weakly simulatable. We believe this is the first construction of a NM-CCA1 scheme that follows strictly from encryption schemes with seemingly weaker or incomparable security definitions to NM-CCA1. Previously, the statistical Plaintext Awareness #1 (PA1) notion was only known to imply CCA1. Our result is therefore novel because unlike the case of Chosen Plaintext Attack (CPA) and Chosen Chiphertext Attack (CCA2), it is unknown whether a CCA1 scheme can be transformed into an NM-CCA1 scheme. Additionally, we show both</span> <span class="fold-elip">…</span><span class="below-fold hidden" >the Damgård Elgamal Scheme (DEG) [in: CRYPTO, J. Feigenbaum, ed., Lecture Notes in Computer Science, Vol. 576, Springer, 1991, pp. 445–456] and the Cramer–Shoup Lite Scheme (CS-Lite) [SIAM J. Comput. 33(1) (2003), 167–226] are weakly simulatable under the DDH assumption. Since both are known to be statistical Plaintext Aware 1 (PA1) under the Diffie–Hellman Knowledge (DHK) assumption, they instantiate our scheme securely. Furthermore, in response to a question posed by Matsuda and Matsuura [in: Public Key Cryptography, D. Catalano, N. Fazio, R. Gennaro and A. Nicolosi, eds, Lecture Notes in Computer Science, Vol. 6571, Springer, 2011, pp. 246–264], we define cNM-CCA1-security in which an NM-CCA1-adversary is permitted to ask a c ≥ 1 number of parallel queries after receiving the challenge ciphertext. We extend our construction to yield a cNM-CCA1 scheme for any constant c. All of our constructions are black-box. </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Public-key encryption, plaintext-awareness, non-malleability </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130485 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 721-748, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs485" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> <input type="hidden" name="id" value="ArticleId_jcs485" /> <button class="btn btn-arrow btn-cart add-single"><i class="icon-shopping-cart" role="presentation"></i> Add to cart</button> </form> </div> </div> </div> <div class='result-item-wrapper'> <div class="result-item dc_type-journal-article " data-itemid="journal-of-computer-security/jcs473"> <div class="result-item-header"> <button class="icon-check-empty toggle-selection" data-cite-id="journal-of-computer-security/jcs473" data-itemid="ArticleId_jcs473"><span class="visuallyhidden">Select this result for bulk action</span></button> <h2 class="result-item-title book-title" data-p13n="journal-article" data-p13n-uri="https://content.iospress.com:443/articles/journal-of-computer-security/jcs473" data-p13n-articleid="journal-of-computer-security/jcs473" data-p13n-title=" Publicly verifiable ciphertexts "   <a href="https://content.iospress.com:443/articles/journal-of-computer-security/jcs473"> Publicly verifiable ciphertexts </a> </h2> </div> <div class="front-meta-data"> <p class="metadata-entry"><span class="generated">Authors: </span> <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Nieto%2C+Juan+Gonz%C3%A1lez%22%29">Nieto, Juan González</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Manulis%2C+Mark%22%29">Manulis, Mark</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Poettering%2C+Bertram%22%29">Poettering, Bertram</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Rangasamy%2C+Jothi%22%29">Rangasamy, Jothi</a> | <a class="badge" href="https://content.iospress.com:443/search?q=author%3A%28%22Stebila%2C+Douglas%22%29">Stebila, Douglas</a> </p> <p class="metadata-entry"><span class="generated">Article Type:</span> Research Article </p> <p class="metadata-entry"> <span class="generated">Abstract: </span> <span>In many applications where encrypted traffic flows from an open (public) domain to a protected (private) domain there exists a gateway that bridges these two worlds, faithfully forwarding all incoming traffic to the receiver. We observe that the notion of indistinguishability against (adaptive) chosen-ciphertext attacks (IND-CCA2), which is a mandatory goal in face of active attacks in a public domain, can be relaxed to indistinguishability against chosen-plaintext attacks (IND-CPA) once the ciphertexts passed the gateway. The latter then acts as an IND-CCA2/CPA filter by first checking the validity of an incoming IND-CCA2-secure ciphertext, transforming it (if valid) into an IND-CPA-secure</span> <span class="fold-elip">…</span><span class="below-fold hidden" >ciphertext, and finally forwarding it to the recipient in the private domain. Non-trivial filtering can result in reduced decryption costs on the recipient's side. We identify a class of encryption schemes with publicly verifiable ciphertexts that admit generic constructions of IND-CCA2/CPA filters (with non-trivial verification). These schemes are characterized by existence of public algorithms that can distinguish ultimately between valid and invalid ciphertexts. To this end, we formally define public verifiability of ciphertexts for general encryption schemes, key encapsulation mechanisms and hybrid encryption schemes, encompassing public-key, identity-based and tag-based encryption flavours. We further analyze the security impact of public verifiability and discuss generic transformations and concrete constructions that enjoy this property. </span> <a class="view-more-abstract" href="#">Show more</a> </p> <p class="metadata-entry"><span class="generated">Keywords: </span> Ciphertext filtering, public key encryption, identity-based encryption, chosen ciphertext attacks </p> <p class="metadata-entry"> <span class="generated">DOI: </span>10.3233/JCS-130473 </p> <p class="metadata-entry"><span class="generated">Citation: </span> <a href="https://content.iospress.com:443/journals/journal-of-computer-security">Journal of Computer Security</a>, vol. 21, no. 5, pp. 749-778, 2013 </p> </div> <div class="pricing"> <strong>Price: EUR 27.50</strong> <form class="add-to-cart-form" id="add-ArticleId_jcs473" action="https://content.iospress.com:443/cart/add" method="post"> <input type="hidden" name="dest" value="https://content.iospress.com/journals/journal-of-computer-security/21/5" /> 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Journal of Computer Security - Volume 21, issue 5 - Journals - IOS Press