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Technical Report Department of Computer Science and Engineering University of Minnesota 4-192 EECS Building 200 Union Street SE Minneapolis, MN 55455-0159 USA TR 04-023 Privacy Leakage in Multi-relational Databases via Pattern based Semi-supervised Learning Hui Xiong, Michael Steinbach, and Vipin Kumar June 01, 2004

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Technical Report

Department of Computer Science

and Engineering

University of Minnesota

4-192 EECS Building

200 Union Street SE

Minneapolis, MN 55455-0159 USA

TR 04-023

Privacy Leakage in Multi-relational Databases via Pattern based

Semi-supervised Learning

Hui Xiong, Michael Steinbach, and Vipin Kumar

June 01, 2004

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Flight ID Cargo Contents Classification

1200 A Boots Unclassified

1200 B Toys Unclassified

1200 C Guns Top Secret

1200 D Butter Unclassified

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55

60

65

70

75

80

85

90

100% 150% 200% 250% 300% 350% 400% 450% 500%

Accu

racy (

Pe

rce

nta

ge

%)

Proportion of prediction

HPSLTOP-K KNNS

KNNS

78

80

82

84

86

88

90

92

94

96

98

100% 150% 200% 250% 300% 350% 400% 450% 500%

Accu

racy (

Pe

rce

nta

ge

%)

Proportion of Prediction

HPSLTOP-K KNNS

KNNS

70

75

80

85

90

95

100

100% 150% 200% 250% 300% 350% 400% 450% 500%

Accu

racy (

Pe

rce

nta

ge

%)

Proportion of Prediction

HPSLTOP-K KNNS

KNNS

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0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

50 100 150 200 250

En

tro

py

Number of Clusters

With PerturbationWithout Perturbation

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

20 40 60 80 100 120

En

tro

py

Number of Clusters

With PerturbationWithout Perturbation

0

0.5

1

1.5

2

2.5

3

50 100 150 200 250

En

tro

py

Number of Clusters

With PerturbationWithout Perturbation

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