Validating a Web Service Security Abstraction by Typing

An XML web service is, to a first approximation, an RPC service in which requests and responses are encoded in XML as SOAP envelopes, and transported over HTTP. We consider the problem of authenticating requests and responses at the SOAP-level, rather than relying on transport-level security. We propose a security abstraction, inspired by earlier work on secure RPC, in which the methods exported by a web service are annotated with one of three security levels: none, authenticated, or both authenticated and encrypted. We model our abstraction as an object calculus with primitives for defining and calling web services. We describe the semantics of our object calculus by translating to a lower-level language with primitives for message passing and cryptography. To validate our semantics, we embed correspondence assertions that specify the correct authentication of requests and responses. By appeal to the type theory for cryptographic protocols of Gordon and Jeffrey's Cryptyc, we verify the correspondence assertions simply by typing. Finally, we describe an implementation of our semantics via custom SOAP headers.Comment: 44 pages. A preliminary version appears in the Proceedings of the Workshop on XML Security 2002, pp. 18-29, November 200

A Taxonomy of Security Threats and Solutions for RFID Systems

RFID (Radio Frequency Identification) is a method of wireless data collection technology that uses RFID tags or transponders to electronically store and retrieve data. RFID tags are quickly replacing barcodes as the “identification system of choice” [1]. Since RFID devices are electronic devices, they can be hacked into by an outsider, and their data can be accessed or modified without the user knowing. New threats to RFID-enabled systems are always on the horizon. A systematic classification should be used to categorize these threats to help reduce confusion. This paper will look at the problem of security threats towards RFID systems, and provide a taxonomy for these threats

Hash Based Four Level Image Cryptography

he paper presents a four level image encryption cryptography based on hash i.e. a replacing table for giving new values to the pixels. The basic motive of this work is to provide a technique for securing the images to the level that one is not able to recognize it while transmission to prevent the attack of intruders. In this paper multi level image cryptography is used base d on chaotic system which employs random integer function for the diffusion phase. The proposed algorithm provides large key space. Results are compared in terms of correlation coefficient which satisfies the property of zero correlation. In this paper it is proposed that multi level image cryptography to securely encrypt the images for the purpose of storing images and transmitting them ov er the Internet. There are two major advantages associated with this system. The first advantage is that it makes the encrypted im age with a constant increasing intensity. The second advantage is that it does not impose any restriction on the decoding of the specifi c image signal because with every new image signal it produces a new hash accordingly. Our system would be systematically evaluated, and it shows a high level of security with excellent image quality

MAC OS X VERSION 10.5 “LEOPARD”

Mac OS X version 10.5 “Leopard” is the sixth major release of Mac OS X. This operating system is the successor of Mac OS X v10.4 "Tiger". Leopard was released on 26 October 2007, and is available in two variantsmacos x

Information Producers, Information Consumers : Location Data Privacy in Institutional Settings

Peer reviewedPreprin

Development of Visual Cryptography Technique for Authentication Using Facial Images

Security in the real world is an important issue to be taken care and to be encountered with various aspects and preventive measures. In the present era, whole major security concerns is the protection of this multimedia web is coming closer from text data to multimedia data, one of the data. Image, which covers the highest percentage of the multimedia data, its protection is very important. These might include Military Secrets, Commercial Secrets and Information of individuals. This can be achieved by visual Cryptography. It is one kind of image encryption. Incurrent technology, most of visual cryptography areembedded a secret using multiple shares. Visual is secret sharing technique used in visual cryptography which divides the secret image into multiple shares and by superimposing those shares the original secret image is going to be revealed, but it create a threat when an intruder get shares with which the image is going to be decrypted easily. However in these project work, an extremely useful bitwise operation is perform on every pixel with the help of key. The key is provided by new concept of sterilization algorithm. Initially Red, Green and Blue channels get separated from image and are going to be encrypted on multiple levels using multiple shares, convert an image into unreadable format and by combining all the shares in proper sequence the original secret image revealed

Mayall:a framework for desktop JavaScript auditing and post-exploitation analysis

Writing desktop applications in JavaScript offers developers the opportunity to write cross-platform applications with cutting edge capabilities. However in doing so, they are potentially submitting their code to a number of unsanctioned modifications from malicious actors. Electron is one such JavaScript application framework which facilitates this multi-platform out-the-box paradigm and is based upon the Node.js JavaScript runtime --- an increasingly popular server-side technology. In bringing this technology to the client-side environment, previously unrealized risks are exposed to users due to the powerful system programming interface that Node.js exposes. In a concerted effort to highlight previously unexposed risks in these rapidly expanding frameworks, this paper presents the Mayall Framework, an extensible toolkit aimed at JavaScript security auditing and post-exploitation analysis. The paper also exposes fifteen highly popular Electron applications and demonstrates that two thirds of applications were found to be using known vulnerable elements with high CVSS scores. Moreover, this paper discloses a wide-reaching and overlooked vulnerability within the Electron Framework which is a direct byproduct of shipping the runtime unaltered with each application, allowing malicious actors to modify source code and inject covert malware inside verified and signed applications without restriction. Finally, a number of injection vectors are explored and appropriate remediations are proposed