The LNCS journal Transactions on ComputationalScience reflects recent developments in the field
of Computational Science conceiving the field not as a mere ancillary science but rather as
aninnovative approach supporting many other scientific disciplines. The journalfocuses on
original high-quality research in the realm of computational sciencein parallel and distributed
environments encompassing the facilitatingtheoretical foundations and the applications of
large-scale computations and massivedata processing. It addresses researchers and practitioners
in areas rangingfrom aerospace to biochemistry from electronics to geosciences
frommathematics to software architecture presenting verifiable computationalmethods findings
and solutions and enabling industrial users to applytechniques of leading-edge large-scale
high performance computationalmethods. This the 27th issue of the Transactions onComputational
Science journal is devoted to the topic of high-performancecomputing. It contains eight full
papers covering the areas of cloudmiddleware multi-processor systems quantum computing
optimization andsecure biometric-based encryption methods.