CFR 21 Part 11, or Title 21 of the Code of Federal Regulations Part 11, is a regulation issued by the US Food and Drug Administration (FDA). It establishes requirements for the use of electronic signatures and the electronic retention of records, particularly in regulated industries such as pharmaceuticals and medical devices. The standard aims to guarantee the integrity, authenticity and reliability of electronic data used in regulated processes, while ensuring compliance with security and confidentiality standards.