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Advances, Systems and Applications

Table 1 Comparison of typical prediction timings, based on the optimised equation 6on the Google App Engine for Java

From: Privacy preserving collaborative filtering for SaaS enabling PaaS clouds

Bit size1 Query vector size2 Typical prediction time
1024 5 500ms
1024 10 650ms
2048 5 3800ms
2048 10 5000ms
  1. 1Paillier cryptosystem modulus bit size, i.e. |n|.
  2. 2Size of the encrypted rating vector.