# Security System

### Defense System

A network defense system is formed by artificial + smart contracts, a professional security team, a mature security system, and rich practical experience in protection, providing multi-level three-dimensional protection for the TreasureNFT platform.  Defense algorithm against DDoS attacks + HTTPS encryption mechanism + massive DDoS cleaning.

### Triple Protection System

The first layer, front-end, back-end and database are physical isolated; the second layer, two-way encryption of communication, information verification and review mechanism; the third layer, system data backup mode, instantaneous, smooth, user-insensitive server switch capability.

### Security Audit

The content of security audit includes translator version security audit, deprecated item audit, redundant code audit, require/assert usage audit, gas consumption audit, integer overflow audit, reentrancy attack audit, pseudo-random number generation audit, transaction order dependency audit, denial of service attack audit, function call permission audit, call/delegatecall security audit, return value security audit, tx.origin usage security audit, replay attack audit, variable coverage audit, business logic audit, business implementation audit, etc. The result of contract audit is all passed, ensuring the security of the platform.

### Wallet Security

TreasureNFT adopts physical defense, separation of hot wallet, cold wallet, and user wallet; software defense, a dedicated wallet tool developed independently; defense-in-depth, multiple audits of wallet code and constant security program scanning.

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