In cryptography, a Type 1 product is a device or system certified by the National Security Agency (NSA) for use in cryptographically securing classified U.S. Government information.
Type 1 certification is a rigorous process that includes testing and formal analysis of (among other things) cryptographic security, functional security, tamper resistance, emissions security (EMSEC/TEMPEST), and security of the product manufacturing and distribution process.
For a historically oriented list of NSA encryption products (most of them Type 1), see NSA encryption systems. For algorithms that NSA has participated in the development of, see NSA cryptography.
Types 1 through 4 are defined in the National Information Assurance Glossary (CNSSI No. 4009) which defines Type 1, Type 2, Type 3, and Type 4 products and keys.
A Type 1 product is defined as: