Blockchain privacy comes with tradeoffs

CN
7 hours ago

Blockchain privacy comes with tradeoffs.

Current privacy solutions make you choose between composability, cost efficiency, or auditability.

@SuiNetwork just shipped privacy infrastructure with no compromises.

The Developer Dilemma

Developers need to keep sensitive data private while maintaining on-chain control: user data, API keys, private messages, AI model weights.

However, most developers rely on Web2 solutions like AWS KMS for key management, which breaks the trust model entirely. "Decentralized" application depends on centralized infrastructure that users must trust.

The alternative is accepting blockchain's fundamental tradeoff: off-chain computation is fast but untrusted, while on-chain execution is verifiable but public and expensive.

Developers face a difficult choice between privacy, decentralization, or cost efficiency.

SEAL

To fix this, Sui introduces a secrets management solution that keeps data off-chain while access is controlled through on-chain logic.

Sensitive data gets encrypted off-chain and can be stored in IPFS, cloud storage, or distributed networks.

Smart contracts define access policies that specify the decryption conditions: time delays, payments, token ownership, or multi-condition rules. The key gets released only when all conditions are met.

Nautilus

SEAL solves data storage privacy, but Nautilus addresses computation privacy.

Nautilus enables developers to run sensitive logic such as pricing checks, identity checks, and AI inference.

Apps generate cryptographic attestations inside TEEs that confirm computation was executed correctly, then submit these attestations to Sui for verification.

What This Enables

This architecture enables new application categories that were not feasible on other chains.

• Private AI agents that can keep user data confidential

• Gated content that releases automatically when conditions are met

• Encrypted chats with per-recipient policies that require no custom cryptography

With Sui, developers can build private applications with no compromise.


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