The UN Security Council.

A blanket that one uses to have a secure feeling or reduced anxiety, usually in the early years of life. / Any object one uses to have a sense of security or reduced anxiety.

(US, informal) A mother for whom issues of safety and national security are of great importance.

(cryptography) Not decodable with all available computer power.

(politics, euphemistic) An army.

A system whereby the state either through general or specific taxation provides various benefits to help ensure the wellbeing of its citizens. / Those benefits paid under such a system.

A procedure or set of procedures followed to ensure that state secrets, trade secrets, data, etc. are not compromised.

Of a device: such that, if it fails, it does so in a way that will cause little or no harm to other devices and personnel.

(computer security) A security vulnerability in a computer system.

plural of security mom