Cytotoxic T lymphocytes (CTLs) are immune system cells that are thought to play an important role in controlling HIV infection. We develop a stochastic ODE model of HIV-CTL interaction that extends current deterministic ODE models. Based on this stochastic model, we consider the effect of CTL attack on intrahost HIV lineages assuming that CTLs attack several epitopes with equal strength. In thi...

our aim was to report techniques and our experience in one-stage angioplasty and stenting of ostium of left common carotid and left internal carotid arteries in an octogenarian man with transient ischemic attack, who was completely recovered from neurologic insults short time after the procedure. an 81-year-old man presented with a transient ischemic attack. neurologic examination showed left s...

We expose an adversarial attack scheme that aims to steal bandwidth for the benefit of a particular set of flows through lunching a distributed interference attack streams on competing flows. The extent to which the interference attack streams were successful in reducing or denying bandwidth from competing flows determines the amount of bandwidth stolen. Given such a goal, our exposed scheme st...

To examine the integrity and authenticity of an IP address efficiently and economically, this paper proposes a new non-Merkle-Damgård structural (non-MDS) hash function called JUNA that is based on a multivariate permutation problem and an anomalous subset product problem to which no subexponential time solutions are found so far. JUNA includes an initialization algorithm and a compression algo...

The design principle of Merkle-Damg̊ard construction is collision resistance of the compression function implies collision resistance of the hash function. Recently multi-block collisions have been found on the hash functions MD5, SHA-0 and SHA-1 using differential cryptanalysis. These multi-block collisions raise several questions on some definitions and properties used in the hash function lit...

We consider the problems of i) using public-key encryption to enforce dynamic access control on clouds; and ii) key rotation of data stored on clouds. Historically, proxy re-encryption, ciphertext delegation, and related technologies have been advocated as tools that allow for revocation and the ability to cryptographically enforce dynamic access control on the cloud, and more recently they hav...

background: the role of temperature changes, as an environmental risk factor, in the human health status has been investigated in recent studies. accordingly, the present two-year study was conducted to evaluate the incidence of myocardial infarction (mi) in warm and cold seasons in ali-ibn abi talib hospital, rafsanjan, iran. materials and methods: in this descriptive and cross-sectional study...

Cloud data owners encrypt their documents before outsourcing to provide their privacy. They could determine a search control policy and delegate the ability of search token generation to the users whose attributes satisfy the search control policy. Verifiable attribute-based keyword search (VABKS) where the users can also verify the accuracy of cloud functionality is one of such schemes. In thi...

The most popular method to construct hash functions is to iterate a compression function on the input message. This method is called Merkle-Damgård method. Most hash functions used in practice such as MD4, MD5, SHA-0, SHA-1 are based on this method. However this method is not always the best. For example, this method can not resist multi-collision attack. Recently some modifications of this met...

A public random function is a random function that is accessible by all parties, in-cluding the adversary. For example, a (public) random oracle is a public random function{0, 1}∗ → {0, 1}. The natural problem of constructing a public random oracle from a pub-lic random function {0, 1} → {0, 1} (for some m > n) was first considered at Crypto 2005by Coron et al. who proved the se...