Data Staging on Untrusted Surrogates
Jason Flinn, Shafeeq Sinnamohideen, Niraj Harish Tolia, M. Satyanaryanan · 2003
In this paper, we show that untrusted computers can be used to securely facilitate mobile data access. We discuss a novel architecture, data staging, that improves the performance of distributed file systems running on small, storage-limited pervasive computing devices by opportunistically caching data on nearby surrogate machines. Surrogates are untrusted and unmanaged: we use end-to-end encryption and secure hashes to provide privacy and authenticity of data, and have designed our system so that surrogates are as reliable and easy to manage as possible. Our results show that data staging improves the performance of interactive applications running on the Compaq iPAQ handheld by up to 64% .