{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T06:17:47Z","timestamp":1777616267993,"version":"3.51.4"},"reference-count":44,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2018,6,26]],"date-time":"2018-06-26T00:00:00Z","timestamp":1529971200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Service recommendation has become an effective way to quickly extract insightful information from massive data. However, in the cloud environment, the quality of service (QoS) data used to make recommendation decisions are often monitored by distributed sensors and stored in different cloud platforms. In this situation, integrating these distributed data (monitored by remote sensors) across different platforms while guaranteeing user privacy is an important but challenging task, for the successful service recommendation in the cloud environment. Locality-Sensitive Hashing (LSH) is a promising way to achieve the abovementioned data integration and privacy-preservation goals, while current LSH-based recommendation studies seldom consider the possible recommendation failures and hence reduce the robustness of recommender systems significantly. In view of this challenge, we develop a new LSH variant, named converse LSH, and then suggest an exception handling approach for recommendation failures based on the converse LSH technique. Finally, we conduct several simulated experiments based on the well-known dataset, i.e., Movielens to prove the effectiveness and efficiency of our approach.<\/jats:p>","DOI":"10.3390\/s18072037","type":"journal-article","created":{"date-parts":[[2018,6,26]],"date-time":"2018-06-26T10:40:50Z","timestamp":1530009650000},"page":"2037","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["An Exception Handling Approach for Privacy-Preserving Service Recommendation Failure in a Cloud Environment"],"prefix":"10.3390","volume":"18","author":[{"given":"Lianyong","family":"Qi","sequence":"first","affiliation":[{"name":"School of Information Science and Engineering, Qufu Normal University, Rizhao 276826, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shunmei","family":"Meng","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing 210094, China"},{"name":"State Key Laboratory for Novel Software Technology, Department of Computer Science and Technology, Nanjing University, Nanjing 210023, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7353-4159","authenticated-orcid":false,"given":"Xuyun","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, University of Auckland, Auckland 1023, New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ruili","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Natural and Mathematical Sciences, Massey University, Auckland 0745, New Zealand"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4879-9803","authenticated-orcid":false,"given":"Xiaolong","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Computer and Software, Jiangsu Engineering Centre of Network Monitoring, Nanjing University of Information Science and Technology, Nanjing 210044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhili","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Computer and Software, Jiangsu Engineering Centre of Network Monitoring, Nanjing University of Information Science and Technology, Nanjing 210044, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wanchun","family":"Dou","sequence":"additional","affiliation":[{"name":"State Key Laboratory for Novel Software Technology, Department of Computer Science and Technology, Nanjing University, Nanjing 210023, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,6,26]]},"reference":[{"key":"ref_1","unstructured":"Naim, H., Aznag, M., Quafafou, M., and Durand, N. (July, January 27). Probabilistic approach for diversifying web services discovery and composition. Proceedings of the International Conference on Web Services (ICWS), San Francisco, CA, USA."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2616","DOI":"10.1109\/JSAC.2017.2760458","article-title":"A distributed locality-sensitive hashing based approach for cloud service recommendation from multi-source data","volume":"35","author":"Qi","year":"2017","journal-title":"IEEE J. Sel. Areas Commun."},{"key":"ref_3","first-page":"17","article-title":"Securing display path for security-sensitive applications on mobile devices","volume":"55","author":"Cui","year":"2018","journal-title":"Comput. Mater. Contin."},{"key":"ref_4","first-page":"197","article-title":"Coverless information hiding based on the molecular structure images of material","volume":"54","author":"Cao","year":"2018","journal-title":"Comput. Mater. Contin."},{"key":"ref_5","first-page":"37","article-title":"Verifiable diversity ranking search over encrypted outsourced data","volume":"55","author":"Liu","year":"2018","journal-title":"Comput. Mater. Contin."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1016\/j.ins.2018.02.056","article-title":"Differentially Private Naive Bayes Learning over Multiple Data Sources","volume":"444","author":"Li","year":"2018","journal-title":"Inf. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"10179","DOI":"10.1109\/ACCESS.2018.2799854","article-title":"When Intrusion Detection Meets Blockchain Technology: A Review","volume":"6","author":"Meng","year":"2018","journal-title":"IEEE Access"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"42","DOI":"10.1016\/j.ins.2016.04.015","article-title":"Ensuring attribute privacy protection and fast decryption for outsourced data security in mobile cloud computing","volume":"379","author":"Zhang","year":"2017","journal-title":"Inf. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"2415","DOI":"10.1007\/s10586-017-0796-5","article-title":"Towards secure and flexible EHR sharing in mobile health cloud under static assumptions","volume":"20","author":"Cai","year":"2017","journal-title":"Cluster Comput."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1016\/j.future.2018.04.076","article-title":"Privacy-preserving machine learning with multiple data providers","volume":"87","author":"Li","year":"2018","journal-title":"Future Gener. Comput. Syst."},{"key":"ref_11","first-page":"518","article-title":"Similarity search in high dimensions via hashing","volume":"99","author":"Gionis","year":"1999","journal-title":"VLDB J."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Qi, L., Zhang, X., Wen, Y., and Zhou, Y. (2015, January 7\u20139). A social balance theory-based service recommendation approach. Proceedings of the International Conference on Asia-Pacific Services Computing (APSCC), Bangkok, Thailand.","DOI":"10.1007\/978-3-319-26979-5_4"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2092","DOI":"10.1587\/transinf.2016EDP7490","article-title":"Data-sparsity tolerant web service recommendation approach based on improved collaborative filtering","volume":"E100D","author":"Qi","year":"2017","journal-title":"IEICE T. Inf. Syst."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Zheng, X., Cai, Z., Li, J., and Gao, H. (2017, January 1\u20134). Location-privacy-aware review publication mechanism for local business service systems. Proceedings of the IEEE International Conference on Computer Communications (INFOCOM), Atlanta, GA, USA.","DOI":"10.1109\/INFOCOM.2017.8056976"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1000","DOI":"10.1016\/j.jcss.2014.12.013","article-title":"A k-anonymous approach to privacy preserving collaborative filtering","volume":"81","author":"Fran","year":"2015","journal-title":"J. Comput. Syst. Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"499","DOI":"10.1007\/s11277-015-3082-y","article-title":"Role of agent technology in web usage mining: homomorphic encryption based recommendation for e-commerce applications","volume":"87","author":"Ahila","year":"2016","journal-title":"Wirel. Pers. Commun."},{"key":"ref_17","unstructured":"Zhu, J., He, P., Zheng, Z., and Lyu, M.R. (July, January 27). A privacy-preserving qos prediction framework for web service recommendation. Proceedings of the International Conference on Web Services (ICWS), New York, NY, USA."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Dou, K., Guo, B., and Kuang, L. (2017). A privacy-preserving multimedia recommendation in the context of social network based on weighted noise injection. Multimed. Tools Appl., 1\u201320.","DOI":"10.1007\/s11042-017-4352-3"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"3437854","DOI":"10.1155\/2017\/3437854","article-title":"Privacy-preserving and scalable service recommendation based on simhash in a distributed cloud environment","volume":"2017","author":"Xu","year":"2017","journal-title":"Complexity"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Qi, L., Zhang, X., Dou, W., Hu, C., Yang, C., and Chen, J. (2018). A two-stage locality-sensitive hashing based approach for privacy-preserving mobile service recommendation in cross-platform edge environment. Future Gener. Comput. Syst.","DOI":"10.1016\/j.future.2018.02.050"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"3075849","DOI":"10.1155\/2018\/3075849","article-title":"Privacy-aware multi-dimensional mobile service quality prediction and recommendation in distributed fog environment","volume":"2018","author":"Gong","year":"2018","journal-title":"Wirel. Commun. Mob. Commun."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Zhang, K., Fan, S., and Wang, H.J. (2018, January 3\u20136). An efficient recommender system using locality sensitive hashing. Proceedings of the Annual Hawaii International Conference on System Sciences (HICSS), Hawaii, HI, USA.","DOI":"10.24251\/HICSS.2018.098"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1109\/TSC.2010.52","article-title":"QoS-aware web service recommendation by collaborative filtering","volume":"4","author":"Zheng","year":"2011","journal-title":"IEEE Trans. Serv. Comput."},{"key":"ref_24","unstructured":"Qi, L., Dou, W., and Zhang, X. (February, January 31). An inverse collaborative filtering approach for cold-start problem in web service recommendation. Proceedings of the Australasian Computer Science Week (ACSW), Geelong, Australia."},{"key":"ref_25","unstructured":"(2018, March 11). Movielens. Available online: https:\/\/grouplens.org\/datasets\/movielens\/."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"467","DOI":"10.1080\/02664763.2013.840271","article-title":"Variable selection in the high-dimensional continuous generalized linear model with current status data","volume":"41","author":"Tian","year":"2014","journal-title":"J. Appl. Stat."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1080\/10485252.2015.1112009","article-title":"Robust group non-convex estimations for high-dimensional partially linear models","volume":"28","author":"Wang","year":"2016","journal-title":"J. Nonparametr. Stat."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"796","DOI":"10.1080\/02664763.2015.1078300","article-title":"Variable selection for high-dimensional generalized linear models with the weighted elastic-net procedure","volume":"43","author":"Wang","year":"2016","journal-title":"J. Appl. Stat."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.na.2015.09.021","article-title":"Some geometrical properties of convex level sets of minimal graph on 2-dimensional Riemannian manifolds","volume":"130","author":"Wang","year":"2016","journal-title":"Nonlinear Anal."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.na.2014.03.002","article-title":"The geometric properties of harmonic function on 2-dimensional Riemannian manifolds","volume":"103","author":"Wang","year":"2014","journal-title":"Nonlinear Anal."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2452","DOI":"10.1080\/03610926.2013.781643","article-title":"SCAD-penalized least absolute deviation regression in high dimensional models","volume":"44","author":"Wang","year":"2015","journal-title":"Commun. Stat.-Theory Methods"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1007\/s10440-017-0094-5","article-title":"Global existence and the optimal decay rates for the three dimensional compressible nematic liquid crystal flow","volume":"150","author":"Xu","year":"2017","journal-title":"Acta Appl. Math."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/j.spl.2017.04.013","article-title":"Restricted profile estimation for partially linear models with large-dimensional covariates","volume":"128","author":"Wang","year":"2017","journal-title":"Stat. Probabil. Lett."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"7448","DOI":"10.1016\/j.jde.2017.08.011","article-title":"Bifurcation of periodic orbits by perturbing high-dimensional piecewise smooth integrable systems","volume":"263","author":"Tian","year":"2017","journal-title":"J. Differ. Equ."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.ffa.2016.11.004","article-title":"The weight distributions of two classes of p-ary cyclic codes with few weights","volume":"44","author":"Yang","year":"2017","journal-title":"Finite Fields Their Appl."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.1007\/s10255-014-0446-0","article-title":"Uniform estimate for the tail probabilities of randomly weighted sums","volume":"30","author":"Wang","year":"2014","journal-title":"Acta Math. Appl. Sin. E"},{"key":"ref_37","first-page":"211","article-title":"An implicit sigma(3) type condition for heavy cycles in weighted graphs","volume":"115","author":"Cai","year":"2014","journal-title":"Ars Combin."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1186\/s13660-016-1152-7","article-title":"Some new generalized volterra-fredholm type discrete fractional sum inequalities and their applications","volume":"2016","author":"Liu","year":"2016","journal-title":"J. Inequal. Appl."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1016\/j.amc.2016.03.004","article-title":"Some classes of equations of discrete type with harmonic singular operator and convolution","volume":"284","author":"Li","year":"2016","journal-title":"Appl. Math. Comput."},{"key":"ref_40","first-page":"109","article-title":"Remarks on the maximum gap in binary cyclotomic polynomials","volume":"59","author":"Zhang","year":"2016","journal-title":"Bull. Math. Soc. Sci. Math."},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Wang, L. (2010). The fixed point method for intuitionistic fuzzy stability of a quadratic functional equation. Fixed Point Theory A, 107182.","DOI":"10.1155\/2010\/283827"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.laa.2017.07.023","article-title":"Some polynomials related to dowling lattices and x-stieltjes moment sequences","volume":"533","author":"Liu","year":"2017","journal-title":"Linear Algebra Appl."},{"key":"ref_43","first-page":"725","article-title":"Oscillation results related to integral average technique for linear hamiltonian systems","volume":"18","author":"Li","year":"2009","journal-title":"Dyn. Syst. Appl."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1650193","DOI":"10.1142\/S0219498816501930","article-title":"Semidualizing bimodules and related gorenstein homological dimensions","volume":"15","author":"Xu","year":"2016","journal-title":"J. Algebra Appl."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/7\/2037\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:10:12Z","timestamp":1760195412000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/7\/2037"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,6,26]]},"references-count":44,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2018,7]]}},"alternative-id":["s18072037"],"URL":"https:\/\/doi.org\/10.3390\/s18072037","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,6,26]]}}}