compression step in addition to the encryption step in the scheme shown in Fig.
10.17(a). The compression step occurs before the encryption stage, and improves
the encryption performance by decreasing the size of data to cipher and decipher.
Compression also results in a decrease in memory footprint, for the encrypted and
compressed data. Additionally, compression increases message entropy and thus
improves the effi ciency of the encryption algorithm. The authors proposed using
the IBM CodePack tool [118] for code compression, which claims to increase
memory density by as much as 35% for a performance impact of +/ 10% (the
exact value depends ...
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