CalcProgrammer1
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Basically, locking a CD is like locking the words on a printed page. Anything that can read it can copy it, because the data is right there to see. Pretty much anything that can be read (be it hard disks, CD's, floppy disks, ROM chips, Flash chips, RAM chips, etc) can be copied, and anything that's copied can be copied again and again and again.
Accessing the data, on the other hand, is the hard part. If you encrypt your files, people can make a copy of your CD, but they still won't be able to read the actual files on either the original or the copy. Encryption usually works by encoding the data with a key phrase (password) so that the contents are scrambled and unreadable. Only a user who knows the password will be able to read the contents, as the password is used to unscramble the data. Of course, the people you give the password to can now copy your CD, or worse, copy the CD without the encryption. This won't work for distributing copies of a CD to everyone as you'd have to give them the password, and with the password there would be no sense for encrypting.
Accessing the data, on the other hand, is the hard part. If you encrypt your files, people can make a copy of your CD, but they still won't be able to read the actual files on either the original or the copy. Encryption usually works by encoding the data with a key phrase (password) so that the contents are scrambled and unreadable. Only a user who knows the password will be able to read the contents, as the password is used to unscramble the data. Of course, the people you give the password to can now copy your CD, or worse, copy the CD without the encryption. This won't work for distributing copies of a CD to everyone as you'd have to give them the password, and with the password there would be no sense for encrypting.