Information-Theoretically Secure Regenerating Codes for Distributed Storage

Regenerating codes are a class of codes for distributed storage networks that provide reliability and availability of data, and also perform efficient node repair. Another important aspect of a distributed storage network is its security. In this paper, the authors consider a threat model where an eavesdropper may gain access to the data stored in a subset of the storage nodes, and possibly also, to the data downloaded during repair of some nodes. They provide explicit constructions of regenerating codes that achieve information-theoretic secrecy capacity in this setting.