The rate region of secure exact-repair regenerating codes for 5 nodes
Fangwei Ye, Kenneth W. Shum, Raymond W. Yeung · 2016
The problem of exact-repair regenerating codes against eavesdropping attack is studied. The eavesdropping model we consider is that the eavesdropper has the capability to observe the data involved in the repair of a subset of nodes. In other words, the repair process is required to be secure. The focus of this paper is on such systems with 5 nodes. Specifically, we characterize the rate regions under secure repair for the (5, 3, 4) and (5, 4, 4) instances with 1 or 2 wiretap nodes. While characterizing the rate region of exact-repair regenerating codes remains open, our results indicate that the problem may be more tractable under the security constraint as described.