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SUMMARY:Hardening Bloom Filter PPRL by modifying identifier encodings - Ra
 iner Schnell (City University\, London\; Universität Duisburg-Essen)
DTSTART:20160912T090000Z
DTEND:20160912T100000Z
UID:TALK67308@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:<span>Co-author: Christian Borgs (University of Duisburg  Esse
 n) <br></span> <span><br>Using appropriate parameter settings\, Bloom filt
 er approaches show linkage  results comparable to linkage based on unencry
 pted identifiers. Furthermore\,  this approach has been used in real-world
  settings with data sets containing up  to 100 Million records. By the app
 lication of suitable blocking strategies\,  linking can be done in reasona
 ble time. However\, Bloom filters have been subject  of cryptographic atta
 cks. Previous research has shown that the straight  application of Bloom f
 ilters has a nonzero re-identification risk. We will  present new results 
 on recently developed techniques to defy all known attacks  on PPRL Bloom 
 filters. These computationally simple algorithms modify the  identifiers b
 y different cryptographic diffusion techniques. The presentation  will dem
 onstrate these new algorithms and show their performance concerning  preci
 sion\, recall in large databases.&nbsp\;</span>
LOCATION:Seminar Room 1\, Newton Institute
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