Primus: Can Two Applications Trust the Same Proof? Imagine proving your financial history to one application today. A few days later, another platform requests the same information, forcing you to repeat the entire verification process. Wouldn't it be better if verified information could be useful across multiple applications? This is where reusable verification becomes interesting. What does it mean? Reusable verification means a user could potentially present an existing cryptographic proof to another application instead of starting from scratch. For example, imagine you use a centralised exchange and want to access two different DeFi services. One needs to verify your trading activity, while the other wants to check your financial eligibility. Instead of repeatedly submitting screenshots or manually sharing records, you could potentially use suitable proofs generated from the same source. Each application would still check whether the proof meets its requirements. Where does Primus fit in? Primus uses zkTLS to help users generate cryptographic proofs about information retrieved from supported HTTPS websites. These proofs allow applications to verify selected claims about external web data. This creates opportunities for information from Web2 platforms to become useful across different Web3 applications. However, not every proof can be reused everywhere. Applications must consider: - Requirements: Does the proof contain the information needed? - Freshness: Is the information still recent? - Privacy: Does it reveal only what's necessary? - Compatibility: Can the receiving application verify it? For example, proof of trading activity won't automatically satisfy an application that needs to verify a current account balance. Why does this matter? Reusable verification could make digital experiences more efficient. It could support: - DeFi: Reusing relevant financial proofs across services. - Digital identity: Presenting verified credentials on different platforms. - Reputation systems: Proving achievements from supported platforms. - Online services: Reducing repeated requests for personal information. My takeaway The internet already contains valuable information, but much of it remains locked inside individual platforms. Making verified information useful across different applications could reduce repeated verification and unnecessary data sharing. Primus is building infrastructure that can help make this possible through zkTLS. The goal isn't just to prove information once. It's to make verified information useful wherever it's needed. @primus_labs