The KIK-20 Secure DTD2000 System (SDS) is a key fill device developed by Sypris Electronics, Florida, US, under the auspices of the U.S. National Security Agency. It, along with the AN/PYQ-10, is intended to eventually replace the AN/CYZ-10 key fill device, along with older units still in service, and can support a wide variety of cryptographic devices and key types.