14 research outputs found
Robust and efficient password authenticated key agreement with user anonymity for session initiation protocol-based communications
A suitable key agreement protocol plays an essential role in protecting the communications over open channels among users using Voice over Internet Protocol (VoIP). This paper presents a robust and flexible password authenticated key agreement protocol with user anonymity for Session Initiation Protocol (SIP) used by VoIP communications. Security analysis demonstrates that our protocol enjoys many unique properties, such as user anonymity, no password table, session key agreement, mutual authentication, password updating freely and conveniently revoking lost smartcards etc. Furthermore, our protocol can resist the replay attack, the impersonation attack, the stolen-verifier attack, the man-in-middle attack, the Denning-Sacco attack, and the offline dictionary attack with or without smartcards. Finally, performance analysis shows that our protocol is more suitable for practical application in comparison with other related protocols
Optimizing AES for Embedded Devices and Wireless Sensor Networks
Abstract—The increased need for security in embedded ap-plications in recent years has prompted efforts to develop en-cryption/decryption algorithms capable of running on resource-constrained systems. The inclusion of the Advanced Encryption Standard (AES) in the IEEE 802.15.4 Zigbee protocol has driven its widespread use in current embedded platforms. We propose an implementation of AES in a high-level language (C in this case) that is the first software-based solution for 16-bit microcontrollers capable of matching the communication rate of 250 kbps specified by the Zigbee protocol, while also minimizing RAM and ROM usage. We discuss a series of optimizations and their effects that lead to our final implementation achieving an encryption speed of 286 kbps, RAM usage of 260 bytes, and code size of 5160 bytes on the Texas Instruments MSP430 microprocessor. We also develop rigorous benchmark experiments to compare other AES implementations on a common platform, and show that our implementation outperforms the best available implementation by 85%. Index Terms—AES, encryption, embedded optimizations, se-cure sensor networks, CC2420, MSP430, Zigbee security. I
Sistema de identificação e localização baseado em dispositivos de comunicações sem fios
Tese de mestrado integrado. Engenharia Electrotécnica e de Computadores (Telecomunicações). Universidade do Porto. Faculdade de Engenharia. 201
Elasmobranchs as living resources: Advances in the biology, ecology, systematics, and the status of the fisheries
This report owes its genesis to the foresight and enthusiam
of Dr. Kazuhiro Mizue. By happy circumstance, Professor Mizue contacted me in 1983 with his visionary ideas on cooperative programs. He noted that the time was right because the Japan Society for the Promotion of Science and the National Science Foundation had mutually given priority to cooperative programs in marine biology.
I therefore agreed to act as the U.S. coordinator and proposed to NSF, a short trip to Japan to negotiate site visits and timing with ten previously appointed Japanese scientists and, if that trip were successful, to negotiate a joint research project, possibly followed by a joint seminar. (PDF file contains 528 pages.
Anales del XIII Congreso Argentino de Ciencias de la Computación (CACIC)
Contenido:
Arquitecturas de computadoras
Sistemas embebidos
Arquitecturas orientadas a servicios (SOA)
Redes de comunicaciones
Redes heterogéneas
Redes de Avanzada
Redes inalámbricas
Redes móviles
Redes activas
Administración y monitoreo de redes y servicios
Calidad de Servicio (QoS, SLAs)
Seguridad informática y autenticación, privacidad
Infraestructura para firma digital y certificados digitales
Análisis y detección de vulnerabilidades
Sistemas operativos
Sistemas P2P
Middleware
Infraestructura para grid
Servicios de integración (Web Services o .Net)Red de Universidades con Carreras en Informática (RedUNCI
BGSU 1981-1982-1983 Undergraduate Catalog
Bowling Green State University undergraduate catalog for 1981-1982-1983.https://scholarworks.bgsu.edu/catalogs/1020/thumbnail.jp
Energy: A continuing bibliography with indexes, issue 15
This bibliography lists 1112 reports, articles, and other documents introduced into the NASA scientific and technical information system from July 1, 1977 through September 30, 1977