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Modernday computer security relies heavily on cryp
tography as a means to protect the data
that we have become increasingly reliant on. The m
ain research in computer security domain
is how to enhance the speed of RSA algorithm. The c
omputing capability of Graphic Processing
Unit as a coprocessor of the CPU can leverage ma
ssiveparallelism. This paper presents a
novel algorithm for calculating modulo value that
can process large power of numbers
which otherwise are not supported by builtin data
types. First the traditional algorithm is
studied. Secondly, the parallelized RSA algorithm i
s designed using CUDA framework. Thirdly,
the designed algorithm is realized for small prim
e numbers and large prime number . As a
result the main fundamental problem of RSA algorith
m such as speed and use of poor or
small prime numbers that has led to significant s
ecurity holes, despite the RSA algorithm's
mathematical
soundness can be alleviated by this algorithm
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