Cryptographic algorithms provide security against attacks
during encryption of data. However, they are computationally
intensive application and consume large amount of CPU time
[1] and space at time of encryption. The goal of this paper is to
compare the different encryption algorithm and to find space
complexity of the encrypted and decrypted data by using
complexities of encryption algorithm. . In this paper provide
comparison between five most widely used algorithms. Based
on following experimental it can be seen that TDES in general
perform better than other algorithms. In this, find that how
these algorithms better utilize for improving performances of
algorithms in terms of space complexity.