How does the delegation chain help security and trust?
There are two common ways to protect data security and privacy. Either from the cryptographic approach or the unbreakable hardware approach. The former can guarantee privacy by math rule, the later guarantee by engineering. We did not choose the cryptographic approach because it is still far from practical. The cost is usually higher than the benefits. We did not choose the unbreakable hardware approach either, because no hardware is unbreakable over time. We design differently by using some part of their advantage but combine with the ideas we learn from the blockchain technologies. Therefore we come with the Delegation Chain idea.
We use some basic cryptographic technics, such as Hash, AES, RSA, ECC etc. But we did not use the more advanced FHE or MPC. On the other hand, we choose some basic security hardware technologies, such as TPM, HSM, but did not choose the more advanced TEE (SGX TrustZone etc). All of these basic technologies are both mature and low cost. Due to their limitation, any of them alone won’t be secure enough, but we creatively combine with together with the consensus idea we learnt from Blockchain. All of them work together to build a secure and trust execution environment.
In the beginning, I would like to list a few fear factors… But do not just get freak out yet, I will give you our solution later.
