It is just a JSON-style ASCII string which contains 3 items. It is a Base64 string that represents 256-bytes-long data, while the 256-bytes-long data is the cipher text of the offline activation information encrypted by Navicat Activation Public Key. I would be very appreciated for your generous. If you have the corresponding private key, please tell me. YyQ1Wt4Ot12lxf0wVIR5mcGN7XCXJRHOFHSf1gzXWabRSvmt1nrl7sW6cjxljuuQ WPH6rvChGl1IRKrxMtqLielsvajUjyrgOC6NmymYMvZNER3htFEtL1eQbCyTfDmt R0QgZFbRnU0frj34fiVmgYiLuZSAmIbs8ZxiHPdp1oD4tUpvsFci4QJtYNjNnGU2 QdW9M2dIdh3jG9yPcmLnmJiGpBF4E9VHSMGe8oPAy2kJDmdNt4BcEygvssEfginvĪ5t5jm352UAoDosUJkTXGQhpAWMF4fBmBpO3EedG62rOsqMBgmSdAyxCSPBRJIOF MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw1dqF3SkCaAAmMzs889I You can see it by a kind of software Resource Hacker. It is stored in navicat.exe as a kind of resource called RCData. It is a RSA-2048 public key that Navicat used to encrypt or decrypt offline activation information. This repository will tell you how Navicat offline activation works.