We identify a flaw in the security proof and a flaw in the concrete security analysis of the WOTS-PRF variant of the Winternitz one-time signature scheme, and discuss the implications to its concrete security.

A biological indicator (BI) is a useful product to confirm sterility assurance after a sterilization procedure. In ISO 11138 and 14161, the concrete procedures regarding the use of BI are described for BI manufacturers and users, respectively. There are several problems involving BI use which must be addressed. These include population verification, D value verification and the general misuse o...

In an inner-product functional encryption scheme, the plaintexts are vectors and the owner of the secret key can delegate the ability to compute weighted sums of the coefficients of the plaintext of any ciphertext. Recently, many inner-product functional encryption schemes were proposed. However, none of the known schemes are secure against chosen ciphertext attacks (IND-FE-CCA). We present a g...

Product lines engineering was born in the 80’s as an economic theory to increase economy of scale. Nowadays, the software product lines approach is promising, encouraging researchers and industrials to collaborate in order to increase software quality and to reduce software development costs. Convincing results have been achieved in specific domains, focusing on constructive (not opportunistic)...

The complexity of designing a product as a whole can be reduced by taking fragments from existing designs and combining them, usually with some modifications. Each fragment concerns a particular part of the designed artefact or aspect of the design process. That is, as well as concrete parts and subsystems, it is also possible to transfer knowledge about those designed artefacts and the process...

1 Currently, the key approach to large-scale software reuse is product line development, an approach built upon the systematic development of building blocks for reuse. While most work on product lines focusses on technical issues, in the end they are built by by people. Winning them for product line development is a key issue in successfully introducing and institutionalizing product line deve...