This text constitutes the refereed proceedings of the Second International Conference on Mobile Data Management, MDM 2001, held in Hong Kong, China, in January 2001. The 18 revised full papers and five industrial papers presented together with eight posters, were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on data management architectures, content delivery, data broadcasting, caching and hoarding, coping with movement, and network and systems issues.

In data publishing, the owner delegates the role of satisfying user queries to a third-party publisher. As the servers of the publisher may be untrusted or susceptible to attacks, we cannot assume that they would always process queries correctly, hence there is a need for users to authenticate their query answers. This book introduces various notions that the research community has studied for defining the correctness of a query answer. In particular, it is important to guarantee the completeness, authenticity and minimality of the answer, as well as its freshness. We present...