Scroll contributed the following description of Cloak V1:

Cloak is a privacy solution deployed on Scroll as a layer-3 chain. It uses Scroll’s zero-knowledge proof technology to ensure correctness of the L3 ledger, and uses strict access control for ensuring confidentiality and auditability.

Zellic conducted a security assessment for Scroll from October 16th to October 22nd, 2025. During this engagement, Zellic reviewed Cloak V1's code for security vulnerabilities, design issues, and general weaknesses in security posture.