Secure Asset Data Transfer with CryptoLegacy

CryptoLegacy manages asset data using elliptic curve encryption, storing encrypted backups on-chain until conditions such as timeouts or guardian approvals are met.

CryptoLegacy provides complete confidentiality by never storing sensitive asset-holder information — such as wallet addresses or token addresses — within the smart contract itself. Instead, it relies entirely on user approvals, with detailed asset data encrypted and stored securely in your browser and on-chain, ensuring total user control.

Encrypted On-chain Backups

CryptoLegacy leverages MetaMask’s built-in encryption (eth-sig-util) utilizing robust elliptic curve cryptography (x25519-xsalsa20-poly1305). Contract owners routinely create encrypted backups containing:

• Asset-holder addresses.

• Token addresses.

• Beneficiary, guardian, and recovery addresses.

• Associated public encryption keys.

These backups are securely embedded in smart contract transaction events on-chain. Although publicly accessible, they remain fully encrypted and confidential.

• Owner Backups: Encrypted using the owner’s own public encryption key and stored separately in dedicated backup contracts on any supported blockchain.

• Beneficiary, Guardian, and Recovery Backups: Individually encrypted using each party’s provided public encryption key and stored directly within the CryptoLegacy contract.

Data Access and Availability

Beneficiaries, guardians, and recovery addresses cannot access encrypted data until specific criteria are met:

• The timeout expires, triggering asset distribution, or

• Guardian thresholds (e.g., 2-of-3) have been reached, and the Guardian challenge period has expired.

To guarantee reliability, CryptoLegacy recommends verifying encryption mechanisms beforehand through test messages.

Future Developments

CryptoLegacy will soon implement additional secure encryption options, specifically addressing wallets without built-in seed-phrase encryption support.

Security Considerations

While theoretically possible for Beneficiaries and Guardians with substantial resources, advanced expertise, and significant time to decrypt stored backups, the practical risk remains extremely low. Beneficiaries and guardians typically represent your most trusted personal contacts, making sophisticated attacks — such as custom blockchain indexing or cryptographic reverse-engineering - highly unlikely.

CryptoLegacy seamlessly integrates privacy, ease-of-use, and robust cryptographic protections, enabling secure, convenient, and confidential management and transfer of your digital legacy.