Provide a file/signature which in practice could be an account username or file signature
and enter a password to encrypt the data.
When retrieving the data the signature is checked and files with that signature are retrieved.
A more secure encryption method with no stored password.
You can add as many inputs as you like. This example uses all textarea
for use with element by tagname you can use just inputs as well for simplicity.
On submit we get all form data using element by tagname.
We loop thru the form data, trim, encode with the password generating a key.
The signature or file/username is then hashed SHA512.
To retrieve data enter name and passward if match found data returned and will decrypt.