The Air Force Life Cycle Management Center, Cryptologic and Cyber Systems Division, Contracting Branch (AFLCMC/HNCK) invites innovative technical approach white papers and proposals addressing the modernization of existing Air Force (AF) cryptographic and cyber systems and laying a foundation for the next generation of AF solutions.  This Overarching Broad Agency Announcement (BAA) is issued under the provisions of paragraph 6.102(d)(2) of the Federal Acquisition Regulation (FAR) and will remain open for a period of FOUR (4) years from the date of publication. NO WHITE PAPERS/PROPOSALS SHOULD BE SUBMITTED AGAINST THIS OVERARCHING BAA.  White Paper/Proposal due dates and times will be specified in CALLs published separately from the overarching announcement at a later date. Proposals received after the due date and time specified in the CALL shall be governed by the provisions of FAR 52.215- 1(c)(3).  See attachment for BAA instructions and details.