16 research outputs found
AES-CBC Software Execution Optimization
With the proliferation of high-speed wireless networking, the necessity for
efficient, robust and secure encryption modes is ever increasing. But,
cryptography is primarily a computationally intensive process. This paper
investigates the performance and efficiency of IEEE 802.11i approved Advanced
Encryption Standard (AES)-Rijndael ciphering/deciphering software in Cipher
Block Chaining (CBC) mode. Simulations are used to analyse the speed, resource
consumption and robustness of AES-CBC to investigate its viability for image
encryption usage on common low power devices. The detailed results presented in
this paper provide a basis for performance estimation of AES cryptosystems
implemented on wireless devices. The use of optimized AES-CBC software
implementation gives a superior encryption speed performance by 12 - 30%, but
at the cost of twice more memory for code size.Comment: 8 pages, IEEE 200
Low-Cost Bluetooth Mobile Positioning for Location-based Application
Bluetooth is a promising short-range radio network technology. We present a
low cost and easily deployed, scalable infrastructure for indoor location-based
computing of mobile devices based on Bluetooth technology. The system consists
of 2 main components, namely the Bluetooth (BT) Sensor System and the Central
Navigation System which have been developed using the JDK 6.0. The Bluetooth
Sensor System allows mobile devices whose Bluetooth mode is set to
discoverable, to be scanned and detected, and they receive customizable text
message of their positioning information, e.g. room identity. The positioning
information is also sent to the Central Navigation System which in turn
displays and updates the navigation map. The system is also used to track the
movement of different BT mobile devices within the implemented environment.Comment: 4 pages 3rd IEEE/IFIP International Conference in Central Asia on
Internet 2007, ICI 200