The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Data sharing has never been easier with the advances of cloud computing, and an accurate analysis on the shared data provides an array of benefits to both the society and individuals. Data sharing with a large number of participants must take into account several issues, including efficiency, data integrity and privacy of data owner. Ring signature is a promising candidate to construct an anonymous...
Software as a Service (SaaS) provides a useful and convenient way for cloud users to enjoy cloud service, but security problems have caused great influence on the development and popularization of SaaS. As a commercial model, SaaS involves different roles of participants who could be dishonest and malicious. This paper presents a security protocol to address several security issues in SaaS and protect...
The notion of Divisible Online/Offline Signature (DOS) was recently introduced by Gao et al. in CT-RSA 2009. In a DOS system, the idea is to perform the signing process in two phases. The first phase outputs offline tokens before the arrival of a message to be signed, where the offline tokens are regarded as a part of full signature, and the second phase is performed very efficiently after knowing...
Secure and efficient communication among a set of mobile node is one of the most important research subjects in ad hoc wireless networks. Due to the resource scarcity in ad hoc networks, traditional key management protocol cannot be effectively applied to such decentralized networks. After study different strategies, in this paper the trust evaluation based clustering technique is employed to propose...
The notion of identity-based online/offline encryption (IBOOE) was recently introduced by Guo, Mu and Chen in FC 2008. In an IBOOE system, the encryption is split into online and offline phases. The offline phase is performed prior to the arrival of a message and the recipient's public key (or,identity). The online phase is performed very efficiently after knowing the message and public key. The IBOOE...
RSA algorithm is a very popular public key cryptosystem which has been widely used in industries. Its security relies on the difficulty of factoring large integers. The general number field sieve (GNFS) is so far the best known algorithm for factoring large integers over 110 digits. The Montgomery's block Lanczos method from Linbox is for solving large and sparse linear systems over finite fields...
Hierarchical identity-based encryption (HIBE) is a generalization of IBE that mirrors an organizational hierarchy, which consists of a root private key generator (PKG), domain PKGs and users. In a traditional HIBE system, users retrieve private keys from their domain PKGs, while domain PKGs request domain secret keys from the root PKG. What's more, the manager of each private key is a single one....
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.