Evaluating the performance and privacy of a token-based collaborative recommender

Ville Ollikainen, Valtteri Niemi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    The rapid expansion of available online services has raised concerns about user privacy. In the online world, only a minority of users is actually aware where their data is stored and the policies, how the data may be eventually used. However, at the same time consumers expect more quality from online services, demanding personalized services that fit their individual needs, preferences and values. One approach for service personalization is to use collaborative recommenders. From the privacy perspective, mainstream collaborative recommenders present an inherent security risk, since they are based on memorizing useritem transactions. In this paper, we will study a recently developed token-based method (sometimes referred as an acronym "upcv") which creates privacy-protecting abstraction that is based on collections of randomly generated tokens. These collections are capable of providing information for collaborative recommendations without maintaining any transactional history. This paper presents quality evaluation of item-To-item recommendations using the token-based collaborative recommender, utilizing ISBN agencies of Book-Crossing dataset (BX) books at the data set. This paper will also discuss challenges related to BX. Privacy issues are evaluated with a specific emphasis on the concept of deniability.
    Original languageEnglish
    Title of host publicationWI '17
    Subtitle of host publicationProceedings of the International Conference on Web Intelligence
    Place of PublicationNew York
    PublisherAssociation for Computing Machinery ACM
    ISBN (Print)978-1-4503-4951-2
    Publication statusPublished - 23 Aug 2017
    MoE publication typeA4 Article in a conference publication
    Event16th IEEE/WIC/ACM International Conference on Web Intelligence, WI 2017 - Leipzig, Germany
    Duration: 23 Aug 201726 Aug 2017


    Conference16th IEEE/WIC/ACM International Conference on Web Intelligence, WI 2017
    Abbreviated titleWI 2017


    • book-crossing
    • collaborative recommender
    • deniability
    • privacy
    • token
    • upcv


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