Abstract
We use unreliable system replicas and unreliable voters to construct redundant dynamic systems that tolerate transient failures in their state transition and error correcting mechanisms. Using low density parity check (LDPC) codes, we develop a fault-tolerant scheme that efficiently protects linear finite state machines (LFSMs) with identical dynamics but distinct input sequences and states. The scheme achieves a probability of failure that remains below any given bound for any pre-specified (finite) time-interval using a constant amount of hardware (XOR gates and voters) per LFSM.
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