Document (#42783)

Author

Wu, Z.
Xie, J.
Pan, J.
Su, X.

Title

¬An effective approach for the protection of user privacy in a digital library

Source

Libri. 69(2019) no.4, S.315-324

Year

2019

Abstract

In a digital library, an increasingly important problem is how to prevent the exposure of user privacy in an untrusted network. This study aims to design an effective approach for the protection of user privacy in a digital library, by consulting the basic ideas of encryption and anonymization. In our proposed approach, any privacy data, which can identify user's real identity, should be encrypted first before being submitted to the library server, to achieve anonymization of user identity. Then, to solve the problem of querying encrypted privacy data, additional feature data are constructed for the encrypted data, such that much of the query processing can be completed at the server-side, without decrypting the data, thereby improving the efficiency of each kind of user query operation. Both theoretical analysis and experimental evaluation demonstrate the effectiveness of the approach, which can improve the security of users' data privacy and behavior privacy on the untrusted server-side, without compromising the availability (i.?e. accuracy, efficiency, and usability) of digital library services. This paper provides a valuable study attempt at the protection of digital library users' privacy, which has a positive influence on the development of a privacy-preserving library in an untrusted network environment.

Content

Vgl.: https://doi.org/10.1515/libri-2018-0148.

Similar documents (content)

1. Wu, Z.; Lu, C.; Zhao, Y.; Xie, J.; Zou, D.; Su, X.: ¬The protection of user preference privacy in personalized information retrieval : challenges and overviews (2021) 1.01

   1.0112787 = sum of:
     1.0112787 = product of:
       1.944767 = sum of:
         0.012921088 = weight(abstract_txt:users in 520) [ClassicSimilarity], result of:
           0.012921088 = score(doc=520,freq=2.0), product of:
             0.040950846 = queryWeight, product of:
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.011471539 = queryNorm
             0.31552678 = fieldWeight in 520, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.0074753854 = weight(abstract_txt:which in 520) [ClassicSimilarity], result of:
           0.0074753854 = score(doc=520,freq=1.0), product of:
             0.041007154 = queryWeight, product of:
               1.2255865 = boost
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.011471539 = queryNorm
             0.18229467 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.030873492 = weight(abstract_txt:problem in 520) [ClassicSimilarity], result of:
           0.030873492 = score(doc=520,freq=3.0), product of:
             0.06393769 = queryWeight, product of:
               1.2495309 = boost
               4.460548 = idf(docFreq=1388, maxDocs=44218)
               0.011471539 = queryNorm
             0.48286846 = fieldWeight in 520, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.460548 = idf(docFreq=1388, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.01985209 = weight(abstract_txt:network in 520) [ClassicSimilarity], result of:
           0.01985209 = score(doc=520,freq=1.0), product of:
             0.06869803 = queryWeight, product of:
               1.2952116 = boost
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.011471539 = queryNorm
             0.2889761 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.022718497 = weight(abstract_txt:effective in 520) [ClassicSimilarity], result of:
           0.022718497 = score(doc=520,freq=1.0), product of:
             0.075161114 = queryWeight, product of:
               1.3547688 = boost
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.011471539 = queryNorm
             0.30226398 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.06407288 = weight(abstract_txt:efficiency in 520) [ClassicSimilarity], result of:
           0.06407288 = score(doc=520,freq=2.0), product of:
             0.119082056 = queryWeight, product of:
               1.7052643 = boost
               6.087415 = idf(docFreq=272, maxDocs=44218)
               0.011471539 = queryNorm
             0.53805655 = fieldWeight in 520, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.087415 = idf(docFreq=272, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.07045131 = weight(abstract_txt:side in 520) [ClassicSimilarity], result of:
           0.07045131 = score(doc=520,freq=1.0), product of:
             0.15983291 = queryWeight, product of:
               1.975612 = boost
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.011471539 = queryNorm
             0.44078103 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.02110377 = weight(abstract_txt:approach in 520) [ClassicSimilarity], result of:
           0.02110377 = score(doc=520,freq=1.0), product of:
             0.09015507 = queryWeight, product of:
               2.0983534 = boost
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.011471539 = queryNorm
             0.234083 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.06652898 = weight(abstract_txt:server in 520) [ClassicSimilarity], result of:
           0.06652898 = score(doc=520,freq=1.0), product of:
             0.1761075 = queryWeight, product of:
               2.539821 = boost
               6.044398 = idf(docFreq=284, maxDocs=44218)
               0.011471539 = queryNorm
             0.37777486 = fieldWeight in 520, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.044398 = idf(docFreq=284, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.056115538 = weight(abstract_txt:user in 520) [ClassicSimilarity], result of:
           0.056115538 = score(doc=520,freq=5.0), product of:
             0.10900646 = queryWeight, product of:
               2.579673 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.011471539 = queryNorm
             0.51479095 = fieldWeight in 520, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.3119744 = weight(abstract_txt:protection in 520) [ClassicSimilarity], result of:
           0.3119744 = score(doc=520,freq=7.0), product of:
             0.2579193 = queryWeight, product of:
               3.073662 = boost
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.011471539 = queryNorm
             1.2095814 = fieldWeight in 520, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.41404438 = weight(abstract_txt:untrusted in 520) [ClassicSimilarity], result of:
           0.41404438 = score(doc=520,freq=2.0), product of:
             0.47292453 = queryWeight, product of:
               4.162077 = boost
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.011471539 = queryNorm
             0.8754978 = fieldWeight in 520, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
         0.8466352 = weight(abstract_txt:privacy in 520) [ClassicSimilarity], result of:
           0.8466352 = score(doc=520,freq=9.0), product of:
             0.665571 = queryWeight, product of:
               8.552085 = boost
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.011471539 = queryNorm
             1.2720435 = fieldWeight in 520, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.0625 = fieldNorm(doc=520)
       0.52 = coord(13/25)
   

2. Wu, Z.; Li, R.; Zhou, Z.; Guo, J.; Jiang, J.; Su, X.: ¬A user sensitive subject protection approach for book search service (2020) 0.96

   0.96346223 = sum of:
     0.96346223 = product of:
       1.6057703 = sum of:
         0.018273178 = weight(abstract_txt:users in 5617) [ClassicSimilarity], result of:
           0.018273178 = score(doc=5617,freq=4.0), product of:
             0.040950846 = queryWeight, product of:
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.011471539 = queryNorm
             0.44622225 = fieldWeight in 5617, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.047748577 = weight(abstract_txt:prevent in 5617) [ClassicSimilarity], result of:
           0.047748577 = score(doc=5617,freq=1.0), product of:
             0.09788221 = queryWeight, product of:
               1.0932146 = boost
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.011471539 = queryNorm
             0.4878167 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.805067 = idf(docFreq=48, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.056003124 = weight(abstract_txt:exposure in 5617) [ClassicSimilarity], result of:
           0.056003124 = score(doc=5617,freq=1.0), product of:
             0.10886083 = queryWeight, product of:
               1.152894 = boost
               8.231152 = idf(docFreq=31, maxDocs=44218)
               0.011471539 = queryNorm
             0.514447 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.231152 = idf(docFreq=31, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.0129477475 = weight(abstract_txt:which in 5617) [ClassicSimilarity], result of:
           0.0129477475 = score(doc=5617,freq=3.0), product of:
             0.041007154 = queryWeight, product of:
               1.2255865 = boost
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.011471539 = queryNorm
             0.31574363 = fieldWeight in 5617, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.01985209 = weight(abstract_txt:network in 5617) [ClassicSimilarity], result of:
           0.01985209 = score(doc=5617,freq=1.0), product of:
             0.06869803 = queryWeight, product of:
               1.2952116 = boost
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.011471539 = queryNorm
             0.2889761 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.030513253 = weight(abstract_txt:query in 5617) [ClassicSimilarity], result of:
           0.030513253 = score(doc=5617,freq=2.0), product of:
             0.07261993 = queryWeight, product of:
               1.3316696 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.011471539 = queryNorm
             0.4201774 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.0996332 = weight(abstract_txt:side in 5617) [ClassicSimilarity], result of:
           0.0996332 = score(doc=5617,freq=2.0), product of:
             0.15983291 = queryWeight, product of:
               1.975612 = boost
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.011471539 = queryNorm
             0.6233585 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.0524964 = idf(docFreq=103, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.02110377 = weight(abstract_txt:approach in 5617) [ClassicSimilarity], result of:
           0.02110377 = score(doc=5617,freq=1.0), product of:
             0.09015507 = queryWeight, product of:
               2.0983534 = boost
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.011471539 = queryNorm
             0.234083 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.09408619 = weight(abstract_txt:server in 5617) [ClassicSimilarity], result of:
           0.09408619 = score(doc=5617,freq=2.0), product of:
             0.1761075 = queryWeight, product of:
               2.539821 = boost
               6.044398 = idf(docFreq=284, maxDocs=44218)
               0.011471539 = queryNorm
             0.5342543 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.044398 = idf(docFreq=284, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.02509563 = weight(abstract_txt:user in 5617) [ClassicSimilarity], result of:
           0.02509563 = score(doc=5617,freq=1.0), product of:
             0.10900646 = queryWeight, product of:
               2.579673 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.011471539 = queryNorm
             0.23022151 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.057766188 = weight(abstract_txt:digital in 5617) [ClassicSimilarity], result of:
           0.057766188 = score(doc=5617,freq=2.0), product of:
             0.1508317 = queryWeight, product of:
               3.0344841 = boost
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.011471539 = queryNorm
             0.3829844 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.332974 = idf(docFreq=1577, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.16675733 = weight(abstract_txt:protection in 5617) [ClassicSimilarity], result of:
           0.16675733 = score(doc=5617,freq=2.0), product of:
             0.2579193 = queryWeight, product of:
               3.073662 = boost
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.011471539 = queryNorm
             0.64654845 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.032171752 = weight(abstract_txt:library in 5617) [ClassicSimilarity], result of:
           0.032171752 = score(doc=5617,freq=2.0), product of:
             0.11421838 = queryWeight, product of:
               3.1244285 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.011471539 = queryNorm
             0.28166878 = fieldWeight in 5617, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.2927736 = weight(abstract_txt:untrusted in 5617) [ClassicSimilarity], result of:
           0.2927736 = score(doc=5617,freq=1.0), product of:
             0.47292453 = queryWeight, product of:
               4.162077 = boost
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.011471539 = queryNorm
             0.6190705 = fieldWeight in 5617, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.905128 = idf(docFreq=5, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
         0.6310447 = weight(abstract_txt:privacy in 5617) [ClassicSimilarity], result of:
           0.6310447 = score(doc=5617,freq=5.0), product of:
             0.665571 = queryWeight, product of:
               8.552085 = boost
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.011471539 = queryNorm
             0.9481253 = fieldWeight in 5617, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.0625 = fieldNorm(doc=5617)
       0.6 = coord(15/25)
   

3. Squicciarini, A.C; Heng Xu, H.; Zhang, X.(L.): CoPE: enabling collaborative privacy management in online social networks (2011) 0.28

   0.2840475 = sum of:
     0.2840475 = product of:
       0.88764846 = sum of:
         0.018273178 = weight(abstract_txt:users in 4128) [ClassicSimilarity], result of:
           0.018273178 = score(doc=4128,freq=4.0), product of:
             0.040950846 = queryWeight, product of:
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.011471539 = queryNorm
             0.44622225 = fieldWeight in 4128, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.01985209 = weight(abstract_txt:network in 4128) [ClassicSimilarity], result of:
           0.01985209 = score(doc=4128,freq=1.0), product of:
             0.06869803 = queryWeight, product of:
               1.2952116 = boost
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.011471539 = queryNorm
             0.2889761 = fieldWeight in 4128, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.022718497 = weight(abstract_txt:effective in 4128) [ClassicSimilarity], result of:
           0.022718497 = score(doc=4128,freq=1.0), product of:
             0.075161114 = queryWeight, product of:
               1.3547688 = boost
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.011471539 = queryNorm
             0.30226398 = fieldWeight in 4128, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8362236 = idf(docFreq=953, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.02110377 = weight(abstract_txt:approach in 4128) [ClassicSimilarity], result of:
           0.02110377 = score(doc=4128,freq=1.0), product of:
             0.09015507 = queryWeight, product of:
               2.0983534 = boost
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.011471539 = queryNorm
             0.234083 = fieldWeight in 4128, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.745328 = idf(docFreq=2839, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.02509563 = weight(abstract_txt:user in 4128) [ClassicSimilarity], result of:
           0.02509563 = score(doc=4128,freq=1.0), product of:
             0.10900646 = queryWeight, product of:
               2.579673 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.011471539 = queryNorm
             0.23022151 = fieldWeight in 4128, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.03164541 = weight(abstract_txt:data in 4128) [ClassicSimilarity], result of:
           0.03164541 = score(doc=4128,freq=2.0), product of:
             0.10731103 = queryWeight, product of:
               2.803828 = boost
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.011471539 = queryNorm
             0.29489428 = fieldWeight in 4128, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3363478 = idf(docFreq=4274, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.11791524 = weight(abstract_txt:protection in 4128) [ClassicSimilarity], result of:
           0.11791524 = score(doc=4128,freq=1.0), product of:
             0.2579193 = queryWeight, product of:
               3.073662 = boost
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.011471539 = queryNorm
             0.4571788 = fieldWeight in 4128, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
         0.6310447 = weight(abstract_txt:privacy in 4128) [ClassicSimilarity], result of:
           0.6310447 = score(doc=4128,freq=5.0), product of:
             0.665571 = queryWeight, product of:
               8.552085 = boost
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.011471539 = queryNorm
             0.9481253 = fieldWeight in 4128, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.0625 = fieldNorm(doc=4128)
       0.32 = coord(8/25)
   

4. Min, J.: Personal information concerns and provision in social network sites : interplay between secure preservation and true presentation (2016) 0.27

   0.2667307 = sum of:
     0.2667307 = product of:
       1.111378 = sum of:
         0.015825037 = weight(abstract_txt:users in 2489) [ClassicSimilarity], result of:
           0.015825037 = score(doc=2489,freq=3.0), product of:
             0.040950846 = queryWeight, product of:
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.011471539 = queryNorm
             0.3864398 = fieldWeight in 2489, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
         0.0074753854 = weight(abstract_txt:which in 2489) [ClassicSimilarity], result of:
           0.0074753854 = score(doc=2489,freq=1.0), product of:
             0.041007154 = queryWeight, product of:
               1.2255865 = boost
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.011471539 = queryNorm
             0.18229467 = fieldWeight in 2489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
         0.01985209 = weight(abstract_txt:network in 2489) [ClassicSimilarity], result of:
           0.01985209 = score(doc=2489,freq=1.0), product of:
             0.06869803 = queryWeight, product of:
               1.2952116 = boost
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.011471539 = queryNorm
             0.2889761 = fieldWeight in 2489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6236176 = idf(docFreq=1179, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
         0.10367497 = weight(abstract_txt:identity in 2489) [ClassicSimilarity], result of:
           0.10367497 = score(doc=2489,freq=3.0), product of:
             0.14337794 = queryWeight, product of:
               1.8711549 = boost
               6.6796074 = idf(docFreq=150, maxDocs=44218)
               0.011471539 = queryNorm
             0.7230887 = fieldWeight in 2489, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.6796074 = idf(docFreq=150, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
         0.11791524 = weight(abstract_txt:protection in 2489) [ClassicSimilarity], result of:
           0.11791524 = score(doc=2489,freq=1.0), product of:
             0.2579193 = queryWeight, product of:
               3.073662 = boost
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.011471539 = queryNorm
             0.4571788 = fieldWeight in 2489, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
         0.8466352 = weight(abstract_txt:privacy in 2489) [ClassicSimilarity], result of:
           0.8466352 = score(doc=2489,freq=9.0), product of:
             0.665571 = queryWeight, product of:
               8.552085 = boost
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.011471539 = queryNorm
             1.2720435 = fieldWeight in 2489, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.0625 = fieldNorm(doc=2489)
       0.24 = coord(6/25)
   

5. Vishwanath, A.; Xu, W.; Ngoh, Z.: How people protect their privacy on facebook : a cost-benefit view (2018) 0.26

   0.25846365 = sum of:
     0.25846365 = product of:
       1.076932 = sum of:
         0.009136589 = weight(abstract_txt:users in 4223) [ClassicSimilarity], result of:
           0.009136589 = score(doc=4223,freq=1.0), product of:
             0.040950846 = queryWeight, product of:
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.011471539 = queryNorm
             0.22311112 = fieldWeight in 4223, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.569778 = idf(docFreq=3384, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
         0.0074753854 = weight(abstract_txt:which in 4223) [ClassicSimilarity], result of:
           0.0074753854 = score(doc=4223,freq=1.0), product of:
             0.041007154 = queryWeight, product of:
               1.2255865 = boost
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.011471539 = queryNorm
             0.18229467 = fieldWeight in 4223, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9167147 = idf(docFreq=6503, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
         0.059856772 = weight(abstract_txt:identity in 4223) [ClassicSimilarity], result of:
           0.059856772 = score(doc=4223,freq=1.0), product of:
             0.14337794 = queryWeight, product of:
               1.8711549 = boost
               6.6796074 = idf(docFreq=150, maxDocs=44218)
               0.011471539 = queryNorm
             0.41747546 = fieldWeight in 4223, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6796074 = idf(docFreq=150, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
         0.035490584 = weight(abstract_txt:user in 4223) [ClassicSimilarity], result of:
           0.035490584 = score(doc=4223,freq=2.0), product of:
             0.10900646 = queryWeight, product of:
               2.579673 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.011471539 = queryNorm
             0.32558239 = fieldWeight in 4223, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
         0.16675733 = weight(abstract_txt:protection in 4223) [ClassicSimilarity], result of:
           0.16675733 = score(doc=4223,freq=2.0), product of:
             0.2579193 = queryWeight, product of:
               3.073662 = boost
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.011471539 = queryNorm
             0.64654845 = fieldWeight in 4223, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.314861 = idf(docFreq=79, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
         0.7982153 = weight(abstract_txt:privacy in 4223) [ClassicSimilarity], result of:
           0.7982153 = score(doc=4223,freq=8.0), product of:
             0.665571 = queryWeight, product of:
               8.552085 = boost
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.011471539 = queryNorm
             1.1992941 = fieldWeight in 4223, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               6.784232 = idf(docFreq=135, maxDocs=44218)
               0.0625 = fieldNorm(doc=4223)
       0.24 = coord(6/25)