Token
security will allow us to create unique tokens and protect our survey using
these unique tokens. Token security is the most secure method to
prevent multiple submissions as it is only possible to take the survey if we
have a valid token.
Another advantage is that we can link a user identity for
each token created, this way we know exactly who did take or didn't take the
survey and as token is just a text we can distribute them using any electronic or non
electronic media we want from standard mail, phone to emails.
Token security has already been used on major
projects to conduct large ballots with great
success.
