Java IO.pdf - Nguyen Dang Binh

Java I/O
Note how little we had to change. I simply imported two more packages and added a
command-line switch and about a dozen lines of code (which could easily have been half that)
to build a Cipher object and add a cipher input stream to the chain. Other encryption
schemes, like password-based encryption, would not be hard to support either. The main
difficulty lies in deciding exactly how the key would be entered, since not all schemes have
keys that map to passwords in a straightforward way. That's left as an exercise for the reader.
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