noun which may take the genitive case particle 'no'
antitheft; burglar-proof
Used attributively to describe devices, systems, or measures that prevent theft or burglary.
この車には盗難防止装置が付いています。
This car is equipped with an antitheft device.
盗難防止のために、窓に鍵をかけてください。
Please lock the windows to prevent theft.
防犯 is broader, covering crime prevention in general, while 盗難防止 specifically targets theft.
Compound of 盗難 (theft) and 防止 (prevention).