# Security

Security in PromptHub is not limited to smart contract correctness—it encompasses execution provenance, licensing enforcement, misuse resistance, and auditability.

#### 1. PromptSig Execution Integrity

* Each invocation is signed with the caller's wallet or agent ID
* Includes input/output hash, prompt version, timestamp
* Prevents prompt tampering, impersonation, or replay attacks

#### 2. Licensing Enforcement

* PromptVault enforces rights (public, gated, restricted)
* Token-gated access ensures SPL/NFT holders are the only valid invokers
* Expiring licenses and invocation caps prevent overuse or resale without consent

#### 3. Governance and Fork Controls

* All prompt versions are linkable by ancestry tree
* Forks are visible and traceable via PromptVault diff view
* DAO-controlled governance can:
  * Mark malicious forks
  * Suspend compromised modules
  * Resolve royalty disputes

#### 4. Formal Verification and Audits

* Vault and Router contracts will undergo formal spec modeling
* Audits are performed for Anchor smart contracts (via trusted third parties)
* Attack vectors including fork spamming, DAG abuse, and ranking manipulation are modeled and mitigated

PromptHub is built with a trust-minimized philosophy: proof of behavior, cryptographic traceability, economic incentive alignment, and decentralized resolution all contribute to the long-term security of the system.