Cryptographic Protocols

Abstract—The current proliferation of mobile devices has resulted in a large diversity of hardware specifications, each designed for different services and applications (e.g. cell phones, smart phones, PDAs). At the same time, e-mail message delivery has become a vital part of everyday communications. This article provides a cost-aware study of an RSA-based e-mail protocol executed upon the widely used Apple iPhone1,2 with ARM1176JZF-S, operating in an High Speed Downlink Packet Access (HSDPA) mobile environment. The proposed study employs formal analysis techniques, such as probabilistic model checking, and proceeds to a quantitative analysis of the e-mail protocol, taking into account computational parameters derived by the devices ’ specifications. The value of this study is to form a computer-aided framework which balances the tradeoff between gaining in security, using high-length RSA keys, and conserving CPU resources, due to hardware limitations of mobile devices. To the best...

Summary form only given. It is well known that despite all of its advantages the digital revolution also leads to large variety of new risks. One principal issue in this context is the growing dependence of our modern information society from the availability and correct (proved) function of modern communication services. First, I'll give a short overview on threats in communication networks (grids, clouds, etc), protocols and secure personal devices. Then I'll discuss current network security approaches based on anonymous message exchanges within communicating systems. Cryptography was first used to ensure data confidentiality, it has been “democratized” by ensuring the safety of telecommunications services, thereby extending its scope to authentication of a person or device, or a message, non-repudiation, integrity but also the anonymity of transactions. The anonymity is sometimes quite important in the new telecommunication and mobile networks services, much more than just message confidentiality. The talk will focus on some examples and new approaches developed in our research laboratory to deal with anonymity in routing protocols for mobile communicating systems.

We report a quantum interference of nondiffracting beams by using photon pairs generated by spontaneous parametric down-conversion. The photon pairs transmitted by two double annular aperture produce fourth-order interference pattern along the transverse plane of detection as well as along the propagation distance. The latter presents a typical behaviour of the so-called Talbot effect . Introduction During the last few years, the properties of nondiffracting beams [1], also known as Bessel beams, have received attention by various authors. Recently, the superluminal behavior of these beams has been under investigation from a theoretical [2] and an experimental [3] point of view. An interesting self-imaging effect phenomenon, resulting from the superposition of two Bessel beams propagating in free space, has been predicted and experimentally demonstrated at a classical level [4]. On the other hand, the correlated photon pairs generated by spontaneous parametric down-conversion produc...

International Journal on Cryptography and Information Security ( IJCIS)
is an open access peer reviewed journal that focuses on cutting-edge results in applied cryptography andInformation security. It aims to bring together scientists, researchers and students to exchangenovel ideas and results in all aspects of cryptography, coding and Information security.

11th International Conference on Cryptography and Information Security (CRYPIS
2022) focuses on cutting-edge results in Applied Cryptography and Information security. It aims to
bring together scientists, researchers and students to exchange novel ideas and results in all aspects of
Cryptography, Coding and Information security.
Authors are solicited to contribute to the conference by submitting articles that illustrate research
results, projects, surveying works and industrial experiences that describe significant advances in the
following areas, but are not limited to

The Hill cipher is a classical symmetric encryption algorithm that succumbs to the know-plaintext attack. Although its vulnerability to cryptanalysis has rendered it unusable in practice, it still serves an important pedagogical role in cryptology and linear algebra. In this paper, a variant of the Hill cipher is introduced that makes the Hill cipher secure while it retains the efficiency. The proposed scheme includes a ciphering core for which a cryptographic protocol is introduced.

All Classical cryptographic methods used in our life based on mathematical ideas & computational assumption are actually unsafe, so quantum cryptography is proposed nowadays Quantum key distribution (QKD) promises secure key agreement by using quantum mechanical systems. QKD will be an important part of future cryptographic infrastructures. It can provide long-term confidentiality for encrypted information without reliance on computational assumptions. Although QKD still requires authentication to prevent man-in-the-middle attacks. Firstly, In this paper At quantum key distribution protocol process is introduced. Secondly, several improvements to the basic steps of two references are reviewed because of its defects, mainly about identity authentication in order to prevent communication partners' counterfeit, including errors removing, estimating Attacker's information, secrecy enhancement, etc. At last, based upon original improvements reserved selectively, the whole process of quantum key distribution protocol after improvement & then comparison is introduced in detail.

Quantum key distribution is a technique that permits the secure distribution of a bit string that is used as key in cryptographic protocols. The security is guaranteed by suitable coding of the information in a quantum property and from the fact that a quantum cannot be both split and cloned. In this article, we give details and show the results of an experimental realization of the B92 quantum key distribution protocol in 1550-nm telecom window. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 236–241, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23025

Internet-enabled wireless devices continue to proliferate and are expected to surpass tradition-al Internet clients in the near future. This has opened up exciting new opportunities in the mobile e-commerce market. However, data secu-rity and privacy remain major ...

In the development of 3G devices, all element of multimedia (text image audio and video) are used. To use this information, a channel of high bandwidth and more secured system is required. In this era, network security has become an issue of importance, on which lot of research is going on. We have proposed image encryption method using elliptic curve cryptography (ECC). RSA is too slow compared to ECC because ECC required smaller key size. In this method, every pixel of the original image is transformed into the elliptic curve point (Xm,Ym), these elliptic curve point convert into cipher image pixel. The resulting system gives comparatively small block size, high speed and high security.

11 th International Conference on Cryptography and Information Security (CRYPIS 2022) focuses on cutting-edge results in Applied Cryptography and Information security. It aims to bring together scientists, researchers and students to exchange novel ideas and results in all aspects of Cryptography, Coding and Information security. Authors are solicited to contribute to the conference by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the following areas, but are not limited to.

The GSM network with the greatest worldwide number of users, succumbs to several security vulnerabilities. The short message service (SMS) is one of its superior and well-tried services with a global availability in the GSM networks. The main contribution of this paper is to introduce a new secure application layer protocol, called SSMS, to efficiently embed the desired security attributes in the SMS messages to be used as a secure bearer in the m-payment systems. SSMS efficiently embeds the confidentiality, integrity, authentication, and non-repudiation in the SMS messages. It provides an elliptic curve-based public key solution that uses public keys for the secret key establishment of a symmetric encryption. It also provides the attributes of public verification and forward secrecy. It efficiently makes the SMS messaging suitable for the m-payment applications where the security is the great concern.

Mashups have emerged as a Web 2.0 phenomenon, connecting disjoint applications together to provide unified services. However, scalable access control for mashups is difficult. To enable a mashup to gather data from legacy applications and services, users must give the mashup their login names and passwords for those services. This all-or-nothing approach violates the principle of least privilege and leaves users vulnerable to misuse of their credentials by malicious mashups. In this paper, we introduce delegation permits - a stateless approach to access rights delegation in mashups - and describe our complete implementation of a permit-based authorization delegation service. Our protocol and implementation enable fine grained, flexible, and stateless access control and authorization for distributed delegated authorization in mashups, while minimizing attackers' ability to capture and exploit users' authentication credentials.

11thInternational Conference    on    Cryptography    and    Information    Security    (CRYPIS 2022)focuses  on  cutting-edge  results  in  Applied  Cryptography  and  Information  security.  It  aims  to bring together scientists, researchers and students to exchange novel ideas and results in all aspects of Cryptography, Coding and Information security.