ChainCatcher news, London-based crypto compliance platform Keyring has raised $6 million in venture capital funding to expand its on-chain compliance platform aimed at institutional investors and protocols. Gumi Cryptos Capital and Greenfield Capital led this seed investment round, with participation from Motier Ventures, Kima Ventures, and others.The company stated that Keyring aims to help financial institutional investors interact with decentralized finance (DeFi) platforms in a compliant manner and restrict counterparty addresses, while using zero-knowledge (ZK) proof technology to protect privacy and sensitive data.