Simple Private Notary security audit, conducted by the Callisto Network Security Department during May 2021.



Simple Private Notary Security Audit Report

Are Your Funds Safe?


Audit Request

Extremely simple, private notary smart contract to certify the ownership, integrity and precedence of a file by storing its sha256 hash, the block timestamp and by forbidding any other address than the owner to create a certificate.

We mainly expect from this audit a confirmation that this simple contract fills its purpose : prove the existence and ownership of a file at a given time, avoid any duplicates, edition or deletion (create-only).

Source code

Disclosure policy

Standard disclosure policy.

Contact information

Website: Immiris



1. In scope

Commit dfe20b9729beef720f5cc4909469f5f2c191c672

2. Findings

In total, 0 issue were reported including:

  • 0 high severity issues.
  • 0 medium severity issue.
  • 0 low severity issue.
  • 0 owner privilege.

3. Conclusion

The audited smart contract can be deployed. No security issues were found during the audit.


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