BUKU ABSTRAK - Universiti Putra Malaysia

Science, Technology & Engineering
Implementation of BB84 protocol on UDP 802.11i
Dr. Zuriati Ahmad Zukarnain
Nur Hanani Kamarul Aizan and Hishamuddin Zainuddin
Faculty of Computer Science and Information Technology, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 6565; zuriati@fsktm.upm.edu.my
Cryptography nowadays is looking for a secure and trusted channel especially in key distribution between
two legitimate parties without being intercepted or decipher by intruders either in wireless or wired communication
medium. The invention of Quantum Cryptography as part of quantum mechanics has solved the key distribution’s
problem in cryptosystem by providing a secure communication channel between two parties with absolute security
guaranteed by the laws of physics. Quantum Key Distribution (QKD) as a new method in key distribution used to
transmit secret key between two legitimate parties. This paper will discuss the implementation of BB84 protocol
in UDP 802.11i Wireless Local Area Network (WLAN). WLAN as a wireless links are much noisier and less
reliable in general than wired links. This type of noise will generate different numbers of key lengths and also
different levels of error rate estimation.
Keywords: Quantum key distribution (QKD), wireless local area network (WLAN), uer datagram protocol (UDP), 802.11i
Large Scale Dielectrophoretic Separation of Cells
Dr. Zurina Zainal Abidin
Robiah Yunus and Fadhilla Hasanah Ahmad Nadzri
Faculty of Engineering, University Putra Malaysia,
43400 UPM Serdang, Selangor, Malaysia.
+603-8946 4371; zurina@eng.upm.edu.my
The use of dielectrophoresis (DEP) to date has mainly been limited to processing small volumes due to
difficulties in the fabrication of microelectrodes over large surface areas. To overcome this problem, a novel
approach to the construction of micro-electrode arrays has been developed based on weaving. A plain weave cloth
was made from 100 micron diameter stainless steel wires and polyester yarns. The stainless steel wires formed the
weft, and were kept parallel and apart by a warp of flexible polyester yarns, with a gap of around micron between
the metal wires. The metal wires were alternately connected to earth and signal of an AC power source, and it
was shown that it was possible to collect yeast cells suspended in deionised water at the metal wire surfaces by
dielectrophoresis. The polyester yarn was also found to distort the electric field, creating further areas of electric
field non-uniformity around the polyester yarns, further enhancing the capability of the system to attract cells.
A separation chamber with greater capacity was constructed and was able to separate dead and live yeast cells.
Keywords: Dielectrophoresis, cell separation, weaving, textile
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