Developers now can run a verifiable random function (VRF) service on Phala Cloud, start with the VRF template within minutes. This template is designed for security, reliability, and ease of deployment. The core features that worth to highlight are:

• ✅ Cryptographically Verifiable: Every random output is signed by a TEE-protected private key and can be independently verified on-chain through signature.

• 🔐Tamper-Proof Execution: The VRF service runs inside a TEE. You can verify the program’s integrity using Remote Attestation, ensuring both the code and its execution environment remain unaltered.

• 🚀 One-Click Deployment: We already built the template. Visit the template to try it!

• ⚡ Low Latency: Our event-driven architecture ensures 2-4 seconds latency end-to-end.

1. Seamless VRF Integration with Phala Cloud

Our Phala Cloud VRF Template cuts integration time from days to minutes. Clone the repo, tweak the config, and deploy the contract. Then with one-click deployment on Phala Cloud, you can enjoy the VRF. You can start with the template on Cloud dashboard, or take a look at the full codebase on Github.

What is VRF?

Verifiable Random Functions (VRF) generate cryptographically secure randomness paired with a proof. Unlike traditional RNGs, anyone can verify the randomness was generated fairly without exposing the secret key – a perfect fit for blockchain’s trustless paradigm.

How Phala Cloud VRF Works:

Our solution combines deterministic randomness generation with on-chain verifiability using public-key cryptography. Here’s the breakdown:

Step 1: Deterministic Randomness Generation (Off-Chain)

Step 2: Generate Cryptographic Proof

Step 3: On-Chain Verification

2. Phala’s KMS: Stable, Persistent Secret Keys with Multi-Instance Backup

No more key rotation headaches. Phala’s kms ensures your VRF secret key remains stable and recoverable.

Key Features:

• Persistent Secret Keys: Keys are securely stored and reused across sessions, eliminating the need for frequent rotations.

• Multi-Instance Backup: Automated backups across geographically distributed TEE nodes guarantee high availability.

• Self-Healing: Even if a TEE instance fails unfortunately, Phala’s KMS seamlessly migrates the key to a healthy node.

3. Performance & Scalability: Built for Production

Speed Metrics:

• 2–4 seconds on most EVM chains (tested on Base Sepolia and Abstract).

• Real-Time Responsiveness: Event-driven architecture ensures our processing latency

⚡ Why We’re Faster:

Traditional VRFs rely on multi-node consensus mechanisms to secure secret keys, requiring time-consuming coordination between nodes. Phala Cloud VRF eliminates this bottleneck with TEE-powered key management (milliseconds vs. network roundtrips)

Try Phala Cloud

• Get started by deploying CVM in TEE, enjoy $400 credit on us!

• Join the Telegram chat for any questions on how to run your CVM.

• View Phala Cloud Blog for insights on the technical stack.

• Last but not the least explore our documentation for a quick overview on how to get started.