how to save to a binary file and then have it return the data back to the user?

Could you kindly specify the method, if you think there is one, for hiding the file's contents on the storage device?

Does it make a difference if a Master File includes data that will exist for a very long time?

4. Fast in java coding please. Thank you File Encryption is the science of writing contents of a file in a secret code. Yourencryption program should work like a filter, reading the content of one file,modifying the data into a code, and then writing the coded contents out to a secondfile. The second file will be a version of the first file, but written in secretcode. Write a program to demonstrate the above working with binary files.