Privacy Assessment of De-identified Opal Data: A report for Transport for NSW
Cryptography and Security
2017-04-28 v1
Abstract
We consider the privacy implications of public release of a de-identified dataset of Opal card transactions. The data was recently published at https://opendata.transport.nsw.gov.au/dataset/opal-tap-on-and-tap-off. It consists of tap-on and tap-off counts for NSW's four modes of public transport, collected over two separate week-long periods. The data has been further treated to improve privacy by removing small counts, aggregating some stops and routes, and perturbing the counts. This is a summary of our findings.
Keywords
Cite
@article{arxiv.1704.08547,
title = {Privacy Assessment of De-identified Opal Data: A report for Transport for NSW},
author = {Chris Culnane and Benjamin I. P. Rubinstein and Vanessa Teague},
journal= {arXiv preprint arXiv:1704.08547},
year = {2017}
}
Comments
14 pages, 3 figures, 4 tables