2016/01/25 by Onur Günlü, Gerhard Kramer, Günlü, Onur +1
Engineering · Physics and Astronomy · #Wireless Communication Security Techniques #Opinion Dynamics and Social Influence
paper · pdf · doi:10.48550/arxiv.1601.06756
The key-leakage-storage region is derived for a generalization of a classic\ntwo-terminal key agreement model. The additions to the model are that the\nencoder observes a hidden, or noisy, version of the identifier, and that the\nencoder and decoder can perform multiple measurements. To illustrate the\nbehavior of the region, the theory is applied to binary identifiers and noise\nmodeled via binary symmetric channels. In particular, the key-leakage-storage\nregion is simplified by applying Mrs. Gerber's lemma twice in different\ndirections to a Markov chain. The growth in the region as the number of\nmeasurements increases is quantified. The amount by which the privacy-leakage\nrate reduces for a hidden identifier as compared to a noise-free (visible)\nidentifier at the encoder is also given. If the encoder incorrectly models the\nsource as visible, it is shown that substantial secrecy leakage may occur and\nthe reliability of the reconstructed key might decrease.\n