Art
J-GLOBAL ID:200902263737435035   Reference number:03A0499971

CAPTCHA: Using Hard AI Problems for Security

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Material:
Volume: 2656  Page: 294-311  Publication year: 2003 
JST Material Number: H0078D  ISSN: 0302-9743  Document type: Proceedings
Country of issue: Germany, Federal Republic of (DEU)  Language: ENGLISH (EN)
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