Privacy-Preserving DRM

Published

April 13, 2010

Author(s)

Radia Perlman, Charles Kaufman, Ray Perlner

Abstract

This paper describes and contrasts two families of schemes that enable a user to purchase digital content without revealing to anyone what item he has purchased. One of the basic schemes is based on anonymous cash, and the other on blind decryption. In addition to the basic schemes, we present and compare enhancements to the schemes for supporting additional features such as variable costs, enforcement of access restrictions (such as over age 21), and the ability of a user to monitor and prevent covert privacy-leaking between a content-provider-provided box and the content provider. As we will show, the different variants have different properties in terms of amount of privacy leaking, efficiency, and ability for the content provider to prevent sharing of encryption keys or authorization credentials.

Proceedings Title

Proceedings of the 9th Symposium on Identity and Trust on the Internet (IDtrust 2010)

Conference Dates

April 13-15, 2010

Conference Location

Gaithersburg, MD, US

Conference Title

9th Symposium on Identity and Trust on the Internet (IDtrust 2010)

Pub Type

Conferences

Download Paper

https://doi.org/10.1145/1750389.1750399

Local Download

Keywords

algorithms, blindable parameterizable public key, cryptography, Digital Rights Management, DRM

Citation

Perlman, R. , Kaufman, C. and Perlner, R. (2010), Privacy-Preserving DRM, Proceedings of the 9th Symposium on Identity and Trust on the Internet (IDtrust 2010), Gaithersburg, MD, US, [online], https://doi.org/10.1145/1750389.1750399, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904959 (Accessed October 11, 2025)