[miki123211]

Good (non-blockchain) use cases include:

- verifiable, auditable, anonymous online voting

- anonymous signatures, authenticating that a whistleblower complaint comes from a real employee, without knowing who the employee is

- verifying your personal data without making it public. E.g. verifying that you're over 18, either black, disabled or low-income, revealing no other identifying information about yourself. This would require collaboration from the government and "compatible" ID cards.

- Blacklist handling, letting you comment anonymously on line, verifying that none of your previous comments have been banned for abuse.