Explain the significance of blind signature and how it is useful?

A blind signature is a type of digital signature in which the contents of a communication are obscured (blinded) prior to signing. The resultant blind signature may be publicly confirmed against the original, unblinded message, much like a regular digital signature.

When the signer and message author are not the same person, blind signatures are frequently employed in privacy-related protocols. Two examples are cryptographic voting systems and digital currency schemes.