We have designed, prototyped, and evaluated the Legend file system, which exploits the ability to regenerate lost files to improve reliability. Unlike RAID-5 and RAID-6, Legend degrades gracefully as the number of failed storage devices increases. Legend also mitigates the high storage capacity overhead imposed by n-way replications. Combined with existing methods, Legend can form another line ...

Fault-based side-channel cryptanalysis is very effective against symmetric and asymmetric encryption algorithms. Although straightforward hardware and time redundancy-based concurrent error detection (CED) architectures can be used to thwart such attacks, they entail significant overheads (either area or performance). The authors investigate systematic approaches to low-cost low-latency CED tec...

ÐIn a fault-tolerant distributed system, it is often necessary for nonfaulty processes to agree on the value of a shared data item. The criterion of Approximate Agreement does not require processes to achieve exact agreement on a value; rather, they need only agree to within a predefined numerical tolerance. Approximate Agreement can be achieved through convergent voting algorithms. Previous re...

A new technique for synthesizing totally symmetric Boolean functions is presented that achieves complete robust path delay fault testability. We apply BDDs for the synthesis of symmetric functions. Only one additional input and one inverter are needed to achieve 100% Path Delay Fault (PDF) testability. The size of the circuit is guaranteed to be at most quadratic in the number of inputs. The te...

This article presents a novel fault-tolerant technique which is based on the previously introduced Modulus Replication Residue Number System (MRRNS). Using the MRRNS mapping technique, we are able to compute using modular arithmetic over identical channels. We can make this system fault tolerant by increasing the number of channels, but by using some elementary polynomial properties we are able...

The LVRT (Low Voltage Ride Through) is the main characteristic of every power system in faulty conditions. When fault occurs, it is essential for power system such as microgrid to control the voltage and frequency normally. Naturally in fault status, the unbalanced voltage and current are inevitable, but with the aid of LVRT technique, microgrid can keep stability in main system parameters such...

In the late nineties, Eli Biham and Adi Shamir published the first paper on Differential Fault Analysis on symmetric key algorithms. More specifically they introduced a fault model where a key bit located in non-volatile memory is forced to 0/1 with a fault injection. In their scenario the fault was permanent, and could lead the attacker to full key recovery with low complexity. In this paper, ...

We propose a new approach to quantifying fault system geometry, using an objective fit of the fault geometry to a test function, specifically here a fault branch. Fitting a Y-shaped object using a cost function to dextral faults in California, we find a number of significant results arising from use of a a systematic, objective, quantitative approach. (1) The largest angle of the branch structu...