ABSTRACT
The spread of computing has led to an outburst in the volume
of data in the communication world. The paper proposes the
cascading of two algorithms PDLZW and Arithmetic Coding
with cryptography. With the hierarchical parallel dictionary
set, the search time can be reduced significantly and all these
dictionaries are operated independently. While the results
generated by Arithmetic Coding are close to the optimal
value. Since cascaded compression may achieve the higher
compression ratio for the file but does not provide required
security aspects. Therefore, the advantage of cryptography has
been taken by XORing the compressed data with the one-time
key, providing compression and security simultaneously. This
paper proposes a new system JDCE, where compression is
provided to the data twice before encrypted it for getting it
ready for transmission.