The Tamias system is a distributed storage system that solves the problem of privacy protection through two types of encryption. Since the data stored on the server is encrypted, privacy can be protected even if the storage server is hosted by a third party. In addition, it is fault-tolerant due to its distributed architecture and the use of erasure coding. Tamias is based on the open-source Tahoe-LAFS distributed file system, and implements our proposed authentication and sharing features. Tamias is based on the open source Tahoe-LAFS distributed file system and implements our proposed authentication and sharing features.