| dc.description.abstract | This paper address the cryptographic keys management problem: how to
generate the cryptographic keys and apply them to secure encryption. The
purpose of this research was to study on utilizing graph labeling for
generating stream-keys and implementing the keys for strengthening
Vigenere encryption. To achieve this objective, the research was carried out
in four stages: developing an algorithm for generating stream-keys, testing
the randomness of the constructed keys, implementing the eligible keys in a
modified Vigenere encryption and, finally, analyzing the security of the
encryption. As the result, most of stream-keys produced by the algorithm are
random, and the implementation of the stream keys to the modified Vigenere
cipher achieve good security. The contributions of this research are utilizing
graph labeling to generate stream-keys and providing different encryption
keys for different blocks in a block based cipher with low storage capacity.
The novel technical results yielded from this research are the algorithm of
developing the source of the stream-keys based on graph labeling, the
algorithm of constructing the initial block keys, and the protocol of a
modified Vigenere encryption using stream-keys and operated in cipher
block chaining mode. | en_US |
