Abstract:
The world is suffering from many political sanctions imposed by
governments on their other counterparts to include the general public without
exception. Among these sanctions is the practice of some countries to block
publicly available websites from the peoples of other countries
This research dealt with the practical implementation of a prototype
model of internet access unblocking system based on the onion routing (TOR)
network infrastructure, as a solution for the nationwide internet blocked access
problem.
The system performance is evaluated in comparison with the direct
access case of IP routing. The average response time for downloading web
pages with different sizes in (KB) is used as a comparison metric.
From the measured results it is concluded that, the difference of average
response time in seconds between the case of direct access and the case of
access through the unblocking system has closed values for different
downloaded file sizes, with average equal to 0.72 sec, which represents the
average latency that produced by the relays of TOR network. The difference of
average response time in percent is decreasing with the file size exponentially,
to be less than 7.6% when the file size is greater than 124kB, because the delay
for routing traffic through the relays of TOR network has more effect on the
first data packet of the same connection, while the rest of the packets come in
succession with negligible effect on throughput reduction.