Dynamic authenticated index structures for outsourced databases

In outsourced database (ODB) systems the database owner publishes its data through a number of remote servers, with the goal of enabling clients at the edge of the network to access and query the data more efficiently. As servers might be untrusted or can be compromised, query authentication becomes an essential component of ODB systems. Existing solutions for this problem concentrate mostly on static scenarios and are based on idealistic properties for certain cryptographic primitives. In this work, first we define a variety of essential and practical cost metrics associated with ODB systems. Then, we analytically evaluate a number of different approaches, in search for a solution that best leverages all metrics. Most importantly, we look at solutions that can handle dynamic scenarios, where owners periodically update the data residing at the servers. Finally, we discuss query freshness, a new dimension in data authentication that has not been explored before. A comprehensive experim...

• Type: Conference
• Year: 2006
• Where: SIGMOD
• Authors: Feifei Li, Marios Hadjieleftheriou, George Kollios, Leonid Reyzin
• Keywords: Database, ODB Systems, Practical Cost Metrics, Query Authentication, SIGMOD 2006