Zama: FHE and The Holy Grail of Blockchain Privacy

Rand Hindy, CEO of Zama, discusses the company's advancements in fully homomorphic encryption (FHE) and its application in blockchain technology. Zama's FHE technology has evolved to become faster and more accessible, enabling its use in databases, AI, and smart contracts. Initially targeting confidential blockchain projects, Zama recognized the need for confidential applications on public blockchains like Ethereum and Solana, leading to the development of the Zama protocol. This protocol allows for confidential smart contracts without requiring changes to existing blockchain protocols, performing computations off-chain to reduce the burden on the blockchain.

The XANA protocol utilizes FHE and multi-party computation (MPC) co-processors to manage application requests securely, ensuring sensitive information remains encrypted on-chain. Ethereum does not perform FHE computations directly; instead, it emits events processed off-chain by XANA co-processors, minimizing performance impact. The protocol includes trusted operators, such as validators and custodians, to maintain security, requiring a quorum for decryption and ongoing research into integrating zero-knowledge proofs.

Zama's approach to composability involves either a shared public key or transactional interactions, with a distinction between ZK-based and FHE-based protocols. Composability in blockchain is challenging in offline scenarios, necessitating confidential computing methods like FHE and threshold decryption. The protocol allows for secure updates of operator participants through "resharing," and governance plays a crucial role in maintaining integrity among operators, with penalties for suspected cheating.

Zama aims to support thousands of confidential transfers per second by 2026, surpassing Ethereum's capacity. The perception of FHE as slow is outdated, with advancements in technology set to enhance performance. Zama's operations currently utilize CPUs, with plans to transition to GPUs. The importance of public verifiability is emphasized, with all production code being open source.

Zama operates as a commercial entity, requiring licenses for commercial use. The protocol features two types of operators: FHE operators for computations and MPC operators for decryption, both of whom must stake Zama tokens. Governance risks include potential attacks that could lead to slashing operators, but the community can fork the protocol if necessary.

The relationship between market cap and protocol security is crucial, with a low market cap indicating vulnerability. Zama's protocol is live on testnet, with applications under development, including a self-custodial bank and a confidential stablecoin. Zama envisions a future where data is encrypted during computation, aiming for widespread adoption of confidentiality in blockchain governance.

Zama's goals for 2027 include operating across multiple chains and ensuring confidentiality on major platforms, with an initial target of 5% to 10% of blockchain transactions being encrypted. The speaker anticipates that FHE will be recognized as equally valuable as blockchain technology by 2027, emphasizing the advantages of integrating FHE with blockchain systems.