Privacy Policy

This is an interim privacy policy published ahead of the relaunch of CardanoWall. A full, localized policy will replace it at this same address when the service goes live.

Overview

CardanoWall is a Cardano-anchored proof-of-existence service operated at cardanowall.com. This policy explains what information we collect when you use the service and how we handle it.

Information we collect

• Account information. Your email address, used to sign you in with one-time codes. If you choose to sign in with Google or Apple, we receive the email address and basic profile information (such as your name) that the provider shares with us.
• Identities and proofs. The public keys of the identities you create and the content hashes you publish. These are public by design and are anchored on the Cardano blockchain. We never receive your original files or your secret keys.

How we use Google and Apple sign-in data

When you sign in with Google or Apple, we use the email address and basic profile only to create and authenticate your account. We do not sell this information, use it for advertising, or share it with third parties for their own purposes. Our use of information received from Google APIs adheres to the Google API Services User Data Policy, including its Limited Use requirements.

Cookies

We set only the cookies needed to operate the service — your signed-in session and your display preferences. We do not use advertising or cross-site tracking cookies.

Service providers

We rely on a small number of processors to run the service, including email delivery (Resend), payment processing (Stripe), content delivery and abuse protection (Cloudflare), and public Cardano and Arweave network gateways. Each receives only the data needed for its function.

Permanence

Proofs anchored on the Cardano blockchain and content stored on Arweave are permanent by design. We cannot edit or delete a record once it is confirmed on-chain.

Your choices

You can request access to, export of, or deletion of your account data at any time; self-service export and deletion are part of the full product.

Contact

Questions about this policy can be sent to hello@cardanowall.com.