The potential of recycled waste polymeric materials as a substitute for aggregates in concrete has been investigated in the study. Two different types of waste polymer, namely polyurethane formaldehyde (PUF) based packaging waste and high density polyethylene (HDPE) were recycled and used in the experiment. Concrete and masonry poly block specimens were prepared using recycled polymer materials...

In a related-key attack, the adversary is allowed to transform the secret key and request encryptions of plaintexts under the transformed key. This paper studies the security of PRFand PRP-constructions against related-key attacks. For adversaries who can only transform a part of the key, we propose a construction and prove its security, assuming a conventionally secure block cipher is given. B...

An efficient measure of the concrete block structure inspection is needed with the increasing demand for concrete blocks. Cracks in the surface of RC member's can be used as a useful measure of quake-proofness of a construction or material fatigue. Specialists used to observe the cracks and experimentally inspect the structures, while applying destructive forces to the blocks. This paper propos...

Since late 90s, there has been a large investment in web archiving. Accessing these huge information sources is getting more and more attention. Web archive users profiles differ from casual web users profiles. Archive users need to analyze, evaluate and compare the information which requires complex queries with temporal dimension. These queries can not be performed by currently proposed acces...

We present a new encryption mode for block ciphers. The mode is efficient and is secure against chosen-plaintext attack (CPA) already if the underlying symmetric cipher is secure against known-plaintext attack (KPA). We prove that known (and widely used) encryption modes as CBC mode and counter mode do not have this property. In particular, we prove that CBC mode using a KPA secure cipher is KP...

The recently introduced Galois/Counter Mode (GCM) of operation for block ciphers provides both encryption and message authentication, using universal hashing based on multiplication in a binary finite field. We analyze its security and performance, and show that it is the most efficient mode of operation for high speed packet networks, by using a realistic model of a network crypto module and e...

Recent advances in block-cipher theory deliver security analyses in models where one or more underlying components (e.g., a function or a permutation) are ideal (i.e., randomly chosen). This paper addresses the question of finding new constructions achieving the highest possible security level under minimal assumptions in such ideal models. We present a new block-cipher construction, derived fr...