An amount of money paid in advance as security against the payor's non-performance of a contractual obligation.

plural of security guard

plural of security blanket

plural of security deposit

plural of security procedure

plural of security hole

The protection of information and information systems from unauthorized access and disruption.

(Internet) Security as it pertains to the Internet, such as information security.

(finance) A security that can be converted into another security.

plural of convertible security