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Chaghri - A FHE-friendly Block Cipher KU Leuven
The Recent progress in practical applications of secure computation protocols has also attracted attention to the symmetric-key primitives underlying them. Whereas traditional ciphers have evolved to be efficient with respect to certain performance metrics, advanced cryptographic protocols call for a different focus. The so called arithmetic complexity is viewed through the number and layout of non-linear operations in the circuit implemented by ...
Differential Analysis of the LED Block Cipher KU Leuven
In this paper, we present a security analysis of the lightweight block cipher LED proposed by Guo et al. at CHES 2011. Since the design of LED is very similar to the Even-Mansour scheme, we first review existing attacks on this scheme and extend them to related-key and relatedkey-cipher settings before we apply them to LED. We obtain results for 12 and 16 rounds (out of 32) for LED-64 and 16 and 24 rounds (out of 48) for LED-128. Furthermore, we ...
Securing the PRESENT Block Cipher Against Combined Side-Channel Analysis and Fault Attacks KU Leuven
© 1993-2012 IEEE. In this paper, we present and evaluate a hardware implementation of the PRESENT block cipher secured against both side-channel analysis and fault attacks (FAs). The side-channel security is provided by the first-order threshold implementation masking scheme of the serialized PRESENT proposed by Poschmann et al. For the FA resistance, we employ the Private Circuits II countermeasure presented by Ishai et al. at Eurocrypt 2006, ...
Improved fault analysis on SIMON block cipher family KU Leuven
© 2016 IEEE. SIMON is a new family of lightweight block ciphers proposed by the National Security Agency (NSA) in 2013. Since its publication, it has attracted much research interest and a number of analysis results have been presented. As a popular kind of implementation attack method, the fault attack also works when it is applied to SIMON. In this paper, we propose an effective fault attack on SIMON under the random byte fault model. Compared ...