The Government is conducting market research to determine available sources for cryptographic device solutions compatible with a Multifunctional Information Distribution System (MIDS) Weapons Data Link (WDL) Small Form Factor Weapons Attritable Radio Multi-Mode (SWARMM) Family 4 (SF4) Radio. THIS IS A RFI/SOURCES SOUGHT ONLY. THIS IS NOT A SOLICITATION ISSUANCE. This RFI/Sources Sought is issued solely for information and planning purposes ? it does not constitute a Request for Proposal (RFP) or a promise to issue an RFP in the future. Please see the attached RFI / Sources Sought document for complete details.