| Presentation | 2012-11-07 Differential Privacy of Positive Semi-definite Matrices Jun SAKUMA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We consider differential privacy of positive semidefinite matrices. We introduce two new randomization schemes; One is a mechanism which applies low-rank approximation as a post process after regular element-wise randomization with Laplace noises. The other is based on eigendecomposition using the matrix von-Mises Fisher distribution. Given a fixed privacy budget, we prove that our mechanisms achieve relatively better accuracy if lower-rank approximation of the output is acceptable. We experimentally demonstrate that low-rank approximation helps to control the accuracy-privacy trade-off with experiments of collaborative filtering and spectral network analysis. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | differential privacy / low-rank approximation / collaborative filtering / spectral analysis / graph Laplacian |
| Paper # | IBISML2012-46 |
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| Conference Information | |
| Committee | IBISML |
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| Conference Date | 2012/10/31(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information-Based Induction Sciences and Machine Learning (IBISML) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Differential Privacy of Positive Semi-definite Matrices |
| Sub Title (in English) | |
| Keyword(1) | differential privacy |
| Keyword(2) | low-rank approximation |
| Keyword(3) | collaborative filtering |
| Keyword(4) | spectral analysis |
| Keyword(5) | graph Laplacian |
| 1st Author's Name | Jun SAKUMA |
| 1st Author's Affiliation | Graduate School oi SIE, University of Tsukuba:Japan Sciance and Technology Agency, PRESTO() |
| Date | 2012-11-07 |
| Paper # | IBISML2012-46 |
| Volume (vol) | vol.112 |
| Number (no) | 279 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |