The applications developed by BlockTac are intended to carry and share certificates that are cryptographically signed, tamper proof, and independently verifiable using the blockchain. No information about you or your certificates is ever shared, except to the original issuer of your certificates.



Certain information (e.g. a recipient’s public key, an encrypted certificate hash, etc.) is transmitted to us solely for the purpose of performing the service and is not used for any other purpose.

1. Information we store

  • No personally identifiable data is stored in the mobile app.
  • Stored certificates are not directly tied to personally identifiable information within the mobile app. Identification is pseudo-anonymous via generated keys.
  • Randomly generated authentication keys necessary for setting up a connection between you and an issuer or your issued certificates.
  • Any messages sent from issuers of your certificates to the mobile app.

2. Transient information

  • IP addresses may be kept in memory for rate limiting or to prevent abuse.
  • Counts for certificate shares.



We do not share your information with companies, organizations, or individuals unless one of the following circumstances applies:

  • You instruct us to through normal use of the app.
  • We are legally compelled to.

We will update this privacy policy as needed so that it is current, accurate, and as clear as possible.

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