Content Labeling for Mobile Internet

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Content Labeling for Mobile Internet

• Fumihiro Kato, Keio University
• Workshop on Content Labeling, WWW2004

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Agenda

• The current situation in Japan
• Dating web sites
• Mobile Internet
• Content Labeling for mobile internet

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Popular Dating Web Sites in Japan

• called Deai-kei sites
• BBS or chat room
• Support to meet the opposite sex anonymously
• 2,000 for PCs, 3,400 for mobile
• fertile soil for crimes
• Child prostitution

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Arrests related to Dating Web Sites
From surveys conducted by National Policy Agency
in 2004
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Law concerned with dating web sites

• Japanese government enacted in September 2003
• Regulates dating web sites
• Prohibits that a minor uses
• Suggests parents to protect their minor
• Punishes with a fine an adult tempted a minor

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Law enacted, but

• Law doesnt support us directly
• No entrance restrictions to verify accurate age
• little insurance against childrens access
• need of solution based on technology

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What did arrests use to access?

• 95 (1,662 out of 1,746) used mobile phone in 2003

From surveys conducted by National Policy Agency,
Japan, 2004
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Official sites and Unofficial sites

• Official Sites
• authorized
• Content fee for Pay sites
• a part of a charge for mobile phone
• Unofficial Sites
• As same as usual web sites
• Unauthorized
• Include Dating web sites

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Mobile Internet
The Internet
Cellular phone network
gateway
Web Sites (Unofficial Sites)
Official Sites
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Cellular Phone Companys action to law

• Provides a new blocking option
• Protects access to the unofficial sites

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After applied a blocking option
The Internet
Cellular phone network
gateway
Official Sites
Unofficial Sites
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Problem of blocking option

• Exclusion of other useful web sites
• Negative efforts on the growth

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We need a solution
The Internet
Cellular phone network
gateway
Unofficial Sites
Official Sites
Unwanted sites
wanted sites
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Applying filtering techniques

• Content Selection
• Search
• Safesearch at Google
• Metadata
• PICS

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Limitations of PICS

• Semantics of vocabulary
• Value is number
• Semantics transparency
• Different values and standards
• Minor under 18, 20, or 21?
• Reliability
• proxy

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Proposed Architecture
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Need of semantic transparency

• Various types of people need to create labels
• From different viewpoints, culture, nation etc.
• People may mix labels
• Compare
• Select
• Close to own viewpoints
• For each web sites
• Merge

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Trusted proxy

• Make filtering more effective
• Inference, Personalization, Collaboration
• Users information
• Use mechanism on mobile internet
• Official sites are authorized
• Many proxies on official sites

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Summary

• dating web sites
• mobile internet
• Content labeling for mobile internet

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Any Questions?