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174 Journal of Library Science in China, Vol.10, 2018

Through analysis of the differences of the three research paradigms and their application, this
study points out stereotypes and weaknesses in present library history. Two cases, the National
Roosevelt Library Planning Committee and the Boone Library School’s operation in Chongqing,
are introduced to demonstrate the application of post-modern theories. This study proposes that
the introduction of new paradigm will improve present research and intensify understanding of
Chinese library history.

A framework for the protection of user behavior preference privacy of digital
library

〇a*
WU Zongda〇, XIE Jian, ZHENG Chengren, ZHOU Zhifeng & CHEN Enhong
Although providing great convenience for users, digital libraries result in users’ serious concerns
on personal privacy due to their more and more untrusted server-sides. In fact, users’ privacy
concerns have become one of the major obstacles to the development and application of digital
libraries. In digital libraries, user privacy can be divided into data privacy and behavior privacy.
Compared to data privacy, the protection of behavior privacy cannot be solved by using traditional
privacy protection methods, because it is not allowed to change existing information services in
digital libraries. Thus, it is more challenging to protect users’ behavior privacy in digital libraries.
The purpose of this paper can be described as follows. Aiming at various kinds of online
behaviors (i.e., service requests) issued by users in a digital library, we aim to construct a unified
framework and model for behavior privacy protection, so as to break the limitations of traditional
privacy protection methods when being applied to digital libraries, i.e., to ensure the security
of various kinds of behavior privacy on the untrusted server-side, under the constraints of not
changing the existing platform architecture and service algorithms of a digital library, and not
compromising the accuracy and efficiency of information services supplied by the digital library.
In this paper, we first design a basic framework for user behavior privacy protection in a digital
library. The basic idea of the framework is to lay a middleware (running at a trusted client, which
is used to implement a privacy protection algorithm) between a library user interface (running at a
trusted client) and the library services (running at the untrusted server); then, for a service request
(i.e., a user behavior) issued by a user, the privacy algorithm would construct a group of high-
quality dummy behaviors, and submit them together with the user behavior to the untrusted server-
side, so as to cover up the sensitive preferences behind user’s behaviors. Based on the framework,
we then present a behavior privacy model, which formulates the constraints that ideal dummy
behaviors should satisfy, to provide a reference for the privacy algorithm running at the client for
the construction of dummy behaviors. Finally, we discuss the design and implementation of the

∗ Correspondence should be addressed to WU Zongda, Email: zongda1983@163.com, ORCID: 0000-0002-4292-3730