In this letter, we propose a privacy-preserving authentication protocol with RSA cryptosystem in an RFID environment. For both overcoming the resource restriction and strengthening security, our protocol uses only modular exponentiation with exponent three at RFID tag side, with the padded random message whose length is greater than one-sixth of the whole message length. key words: cryptography...

This paper presents a new signature forgery strategy. The attack is a sophisticated variant of Desmedt-Odlyzko’s method [11] where the attacker obtains the signatures of m1, . . . , mτ−1 and exhibits the signature of an mτ which was never submitted to the signer; we assume that all messages are padded by a redundancy function μ before

Padding techniques are well-known from Computational Complexity Theory. Here, an analogous concept is considered in the context of existential second-order logics. Informally, a graph H is a padded version of a graph G, if H consists of an isomorphic copy of G and some isolated vertices. A set A of graphs is called weakly expressible by a formula ' in the presence of padding, if ' is able to di...

An effect of a hydrophobic composition based on polymers the hydrophobicity and performance properties cotton fabrics various surface structures has been studied. The processing fabric was carried out by plus method. persistence achieved evaluated emergence first drops water through tissue wetting angle. High values were observed in samples treated with an aqueous emulsion fluorine-containing d...