protection, safeguard (protection granted by any authority)
certificate, protection (of the writing by which this protection is granted)
protection, safeguard (a person or thing that serves as a guarantee and defence against a danger that one fears)
back-up, backup, saving (action of keeping important information safe)
back-up, backup (the secure data themselves)
protection sheet, waste sheet (strip of paper made to protect the endpapers of books during the bookbinding)
chain, safety line, tether (rope for holding something)
range safety, safety (all the measures provided during the launch campaign or atmospheric re-entry of a spacecraft in order to ensure the safety of people and goods in terrestrial, maritime and airspaces)
range safety, safety (by extension) (result of the measures of range safety)