In this paper we show a new differential fault analysis (DFA) on the AES-128 key scheduling process. We can obtain 96 bits of the key with 2 pairs of correct and faulty ciphertexts enabling an easy exhaustive key search of 2 keys. Furthermore we can retrieve the entire 128 bits with 4 pairs. To the authors’ best knowledge, it is the smallest number of pairs to find the entire AES-128 key with a...

Studies on Simultaneous Saccharification and Fermentation (SSF) of corn flour, a major agricultural product as the substrate using starch digesting glucoamylase enzyme derived from Aspergillus niger and non starch digesting and sugar fermenting Saccharomyces cerevisiae in a batch fermentation. Experiments based on Central Composite Design (CCD) were conducted to study the effect of substrate co...

The aim of this work was to assess OchratoxinA (OTA) production of different Aspergillus carbonarius isolates, evaluate their growth profile through different growth measurements, and reveal any underlying correlation between them. Ten different isolates of A. carbonarius isolated from Greek vineyards located in different geographical regions were examined in vitro for their OTA production pote...

Side-channel cryptanalysis is a very efficient class of attacks that recovers secret information by exploiting the physical leakage of a device executing a cryptographic computation. To adress this type of attack, many countermeasures have been proposed, and some papers adressed the question of constructing an efficient masking scheme for existing ciphers. In their work, G. Piret, T. Roche and ...

The influence of aeration on algal growth and gamma-linolenic acid (GLA) production in a bubble column photobioreactor was investigated. Studies were performed in a 20-L reactor at different aeration rates (0.2- 2.5 vvm). Static, continuous, and periodic operation of air resulted in 41.9%, 88.4%, and 108% air saturation of dissolved oxygen, for which the corresponding values of GLA were 2.3, 6....

Researchers have demonstrated the ineffectiveness of deterministic countermeasures and emphasized on the use of randomness for protecting cryptosystems against fault attacks. One such countermeasure for AES was proposed in LatinCrypt 2012, which masks the faulty output with secret values. However this countermeasure does not affect the erroneous byte in the faulty computation of the last AES ro...

The development of optimal bacterial strains for industrial scale of fermentation would benefit from a quantitative model of rate of gene expression from DNA to RNA, from DNA to protein, and ultimately from DNA to the metabolites. In this study, we developed such a model for phenazine-1-carboxylic acid (PCA) biosynthesis in Pseudomonas sp. strain M18G. The PCA biosynthesis is controlled by anop...

Studies on Co-Culture fermentation of tapioca flour as the substrate symbiotic strains of starch digesting Aspergillus niger and non starch digesting and sugar fermenting Saccharomyces Cerevisaie in a batch fermentation. The effect of Carbon to Nitrogen (C/N) ratio of the fermentation medium on ethanol concentration and biomass was investigated. The optimum C/N ratio of the fermentation medium ...

The effect of temperatures ranging from 15 to 35 degrees C on a culture of Brettanomyces bruxellensis was investigated in regards to thermodynamics, metabolism, and kinetics. In this temperature range, we observed an increase in growth and production rates. The growth behavior was well represented using the Arrhenius model, and an apparent activation energy of 16.61 kcal/mol was estimated. A st...

Tannase (tannin acyl hydrolase, E.C.3.1.1.20) is an important hydrolysable enzyme with innumerable applications and industrial potential. In the present study, a kinetic model has been developed for the batch fermentation used for the production of tannase by A.flavus MTCC 3783. Maximum tannase activity of 143.30 U/ml was obtained at 96 hours under optimum operating conditions at 35oC, an initi...