# zkTLS ### Zero-Knowledge Verification for the Web In a world where trust is fragmented across countless platforms, zkTLS gives users and applications the power to verify real-world data from any website — **without ever exposing the underlying information**. zkTLS is a core component of XION's **Truth Engine**, the verification infrastructure that makes blockchain actually useful. It enables cryptographic proofs over TLS-encrypted web sessions, allowing users to prove specific claims (e.g., "my Uber rating is above 4.5" or "I have an active premium subscription") while keeping everything else completely private. This isn't about sharing screenshots, logging into third-party services, or trusting centralized oracles. It's about mathematical truth that smart contracts can rely on directly. #### Why zkTLS Matters Traditional verification creates impossible trade-offs: * **Privacy vs Utility**: Users must surrender sensitive data or credentials to prove even simple facts. * **Cooperation vs Innovation**: Building cross-platform features requires partnerships with every data source (Uber, banks, LinkedIn, etc.). * **Centralization vs Trust**: Applications depend on intermediaries that can be manipulated, go offline, or change their policies. zkTLS breaks these constraints entirely. By leveraging the existing TLS infrastructure that secures virtually the entire internet, it lets users generate **provable claims** from any HTTPS website. The result? Applications can make intelligent, trust-based decisions while users retain full control over their data. This unlocks entirely new categories of applications: * Loyalty programs that recognize your status on competitor platforms without their cooperation * Advertising systems that verify real humans and high-value users without invasive tracking * Financial products that assess risk based on real banking data without seeing balances * Marketplaces where reputation travels seamlessly across ecosystems * Data marketplaces where users truly own and monetize their verified attributes The marketing promise is simple: **Build applications that understand their users as deeply as the big tech platforms — but with user consent and cryptographic guarantees.** #### How zkTLS Works The flow is designed to be seamless from the user's perspective: 1. **Claim Selection**: The application (or user) requests a specific verifiable claim, such as "Uber rating ≥ 4.5" or "LinkedIn tenure > 2 years at current role." 2. **Client-Side Proof Generation**: Using the user's authenticated browser session or secure connection to the target website, a zero-knowledge proof is generated **entirely on the user's device**. The raw website data, cookies, or session details never leave the device. 3. **On-Chain Verification**: The compact proof is submitted to XION. The protocol verifies it cryptographically and mints an on-chain **attestation** — a permanent, queryable record bound to the user's Meta Account. 4. **Programmable Action**: Any smart contract or application can read this attestation to trigger logic: unlock rewards, adjust pricing, grant access, personalize experiences, or combine it with other proofs. The entire process happens with Web2-like simplicity thanks to XION's abstraction layer — users never see gas fees, private keys, or complex blockchain interactions. #### What Can Be Verified with zkTLS Because it works with any TLS-protected website, zkTLS covers an enormous surface area of the internet. Here are some of the most compelling categories: **Identity & Reputation** * Platform ratings and reviews (Uber, Airbnb, DoorDash, Yelp) * Social media metrics and engagement (followers, verification status, influence) * Professional credentials and tenure (LinkedIn, company career pages) * Community standing and forum reputation **Financial Trust Signals** * Bank or investment account balance ranges (without revealing exact figures) * Creditworthiness indicators and spending patterns * Investment portfolio existence or account types * Transaction history patterns (e.g., consistent on-time payments) **Commerce & Loyalty** * Purchase history and spending tiers from major retailers * Subscription status, tier, and renewal patterns * Loyalty program membership and benefits level * Review authorship and feedback credibility **Access & Membership** * Account existence and activity on premium platforms * Geographic or eligibility-based claims from account settings * Age or demographic verification from authenticated services * Membership status for clubs, professional organizations, or exclusive communities The power lies in **selective disclosure** — prove exactly what is needed, nothing more. #### Privacy and Security by Design zkTLS is built on principles that put users first: * **Data stays local**: Raw information from websites never leaves the user's device. * **Selective & Minimal**: Only the requested claim is proven; everything else remains hidden. * **Non-transferable**: Attestations are cryptographically bound to a user's Meta Account. * **Tamper-proof**: Mathematical guarantees prevent fabrication or modification of claims. * **No browsing history exposure**: No cookies, no session data, no behavioral profiling is revealed to applications. This creates a new standard of privacy-preserving verification that respects user sovereignty while delivering the trust signals applications need. #### zkTLS in the Truth Engine zkTLS doesn't work in isolation. It forms one pillar of XION's comprehensive verification system: * **zkTLS** for web and platform data * **zkEmail (DKIM)** for authenticated email content * **App Attestations** for mobile application state Together, they enable **composable verified profiles**. A user can combine an Uber rating (zkTLS), employment confirmation (DKIM), and fitness milestones (App Attestation) into a rich, privacy-first identity that any application can query with permission. This composability, anchored to Meta Accounts, is what makes XION the Trust Layer for the Internet. #### Get Started with zkTLS Ready to build applications that understand real users without invading their privacy? Head to the [Developer Documentation](https://github.com/burnt-labs/docs/blob/main/xions-core/concepts/developers/README.md) to explore integration patterns, SDKs, example contracts, and live demos. Whether you're building the next generation of loyalty programs, reputation systems, or data marketplaces, zkTLS provides the foundational truth layer. **The internet is full of valuable signals. zkTLS lets you use them — privately, portably, and programmatically.** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.burnt.com/xion/xions-core/concepts/verification-infrastructure/zktls.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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