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I’m encrypting a string in Java, and when I’m printing the encrypted data, I see only question marks.
As an example:
Plain text: jjkkjlkljkj
Encrypted text: ???????????
After decrypting this text again, I’m getting jjkkjlkljkj again.
So it looks like the encryption worked right. But why can I see only question marks?
Yes, it’s because you can’t print the strings that are resulting from the encryption.
Note that saving the encrypted result in a string will possibly result in loss of the data, so don’t do that. Take it as a byte array, and convert it to a displayable format, like Base64 or just simple Hex.