A perfectly encrypted CD *should* look blank. Unless you enter the correct password, or you cannot use the CD's content.
Both Bestcrypt and Scramdisk are good softwares. But the drawback is that even you have the password, if you don't have the software installed on your PC, still you cannot utilize the encrypted CD.
"Encryption for CD-ROM" is another very good software. It doesn't require the program itself for decryption. However, one main disadvantage is that the encryted files are "visible" to all outsiders. That is, even you don't have the password, you can still see the filenames and sizes of the files,etc. , although you cannot use them.
You may now wonder, " As there is no program pre-installed, and the CD looks blank, how do you think you can enter your password? "
Well, actually it is not difficult, I will try to list out 2 methods:
1. When the end-user insert the CD, a pop-up window will appear on the screen( sort of like autorun), it requires the user to enter the password. If the password is correct, then he can read the original CD (i.e, decrypted). If the password is wrong, then all he can read is a blank disk. He may need to re-insert the CD in order the activate the pop-up again.
2. When the end-user insert the CD, all he can read is a single file. If he execute the file, a pop-up window will appear on the screen, it requires the user to enter the password. If the password is correct, then he can read the original CD (i.e, decrypted). If the password is wrong, then all he can read is the single file. He can repeat this procedure again and again until he enter the right password.
So, my question is: Is there any very very good encryption program out there that makes a near-perfect encryption for CD? Thanks.