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navigate by keyword : access account agent alarm alert antivirus architecture assistance bank camera cctv concept construction cryptographic danger data denied deposit deposition encryption firewall hazard help identicalness identification identity important insurance key locked mobile network online onlooker personal police protected protection radar radiolocation reliability reliableness risk secret security service sieren spy surveillance tower unlocked watcher

Here is an set of Security and Protection icons that i am sure you will find very useful. This icon pack is filled with useful icons that would be great for your design projects!