15. IANA Considerations (IANA 考虑)

RFC 6797 定义并注册 HTTP response header field Strict-Transport-Security.

该 header field 用于让 host 向 UA 声明 HSTS policy. 它包含 REQUIRED max-age directive 和 OPTIONAL includeSubDomains directive. Header field 的注册信息归入 HTTP header field registry, 供实现和后续规范引用.