Blockchain, which has a distributed structure, been widely used in many areas. Especially the area of smart cities, blockchain technology shows great potential. The security issues affect construction cities to varying degrees. With rapid development quantum computation, elliptic curves cryptosystems are not secure enough. This paper presents system based on lattice cipher, can resist attack computation. most challenge is that size public keys and signatures by typically very large. As...

Weizheng Chen, Jinpeng Wang, Yan Zhang, Hongfei Yan, Xiaoming Li. Proceedings of the 53rd Annual Meeting Association for Computational Linguistics and 7th International Joint Conference on Natural Language Processing (Volume 2: Short Papers). 2015.

The Ba 0.95 La 0.05 Fe 0.9 Nb 0.1 O 3− δ electrode provides a unique combination of good tolerance for H 2 -reduction and low polarization resistances the oxygen reduction reaction hydrogen oxidation reaction.

Integrating data from multiple heterogeneous sources entail dealing with different models, schemas and query languages. The burgeoning Semantic Web has provided several new methods for integration. This paper focuses on integration of relational database XML data. To solve the problem we propose an ontology-based approach. A semantic infrastructure is presented. In this infrastructure, ontology used as mediated schema representation source semantics. model schemas, a describing method based...

The Internet of Things (IoT) connects everyday devices and generates real-time data that have greatly prompted business life efficiency. integration IoT blockchain has made management storage more trustworthy. However, despite the immutability property contributes a lot to trustable reputation blockchain-based systems, from processing perspective, it is desired achieve skillful secure rewriting for scenarios such as device sharing. Existing solutions usually rely on centralized modifiers...

The emergence of the semantic Web has given rise to several researches on integration heterogeneous relational databases using ontology. This paper studies query rewriting problem in such an scenario. RDFpsilas graph model lends itself well expressing data. To schema, we propose a data source describing method based SPARQL patterns and give some principles for mapping between schema RDF is further discussed algorithm presented so that can access without converting into physical triples.

In recent years, Low Power and Lossy Networks (LLNs) have attracted the attention of researchers. They typically operate with strict resource constraints in communication, computation, memory, energy. Routing Protocol for Low-Power (RPL) is an ad-hoc Distance Vector routing protocol LLNs that adapts IPv6 runs on top IEEE 802.15.4 standard. Although RPL was originally designed static topologies, many applications mobility support has been a major requirement LLNs. This paper focuses...

Data integration is the main problem encountered by applications that need to query across multiple autonomous and heterogeneous data sources. This paper addresses this using logic-based approach. We present a semantic infrastructure for relational data. In infrastructure, ontology used as mediated schema. The formal semantics of SPARQL defined according W3C candidate recommendation translation algorithm from datalog provided. A rewriting based on also provided integration.

In this paper, we design an efficient deduplication algorithm based on the distributed storage architecture of Ceph. The uses on-line block-level data technology to complete slicing, which neither affects process in Ceph nor alter other interfaces and functions Without relying any central node, maintains characteristics by designing a special hash object store fingerprint, CRUSH judge duplication calculation, instead global search. replaces duplicate with deduplicated objects, their...

In recent years, mobility support has become an important requirement in various wireless sensor network (WSN) applications. However, due to the strict resource constraints of power, memory, and processing resources WSNs, routing protocols are mainly designed without considering mobility. Low-Power Lossy Networks (LLNs) a special type WSNs that tolerate data loss. The Routing Protocol for (RPL) is protocol LLNs adapts IPv6 (Internet version 6) runs on top IEEE (Institute Electrical...

Recently, mobility support has become an important requirement in various Wireless Sensor Networks (WSNs). Low-power and Lossy (LLNs) are a special type of WSNs that tolerate certain degree packet loss. However, due to the strict resource constraints computation, energy, memory LLNs, most routing protocols only static network topologies. Data collection data dissemination two basic traffic modes LLNs. Unlike collection, is less investigated There sorts data-dissemination methods:...

With the development of supply chain, information-sharing has received great attention recently. At same time, partners in chain improve efficiency through information sharing, but private needs to be protected. We propose a data sharing scheme based on Quorum blockchain, namely Sharingchain. Distribute keys transactions achieve access control information. Access rights can revoked or authorized key management. In addition, public transaction structure is designed transmit encrypted data....

Cloud data management has significant benefits for storage and processing. However, it also brings some security concerns, such as the integrity of reliability online verification. To solve this problem, paper proposes a blockchain edge computing based public audit scheme, which is different from traditional third-part auditor common blockchain-based two-party scheme. Specifically, scheme consists owners, servers, cloud service providers. According to privacy data, owner generates...