A resource, tool, or mechanism used to maintain a condition of security in a computerized environment. These objects are defined in terms of attributes they possess, operations they perform or are performed on them, and their relationship with other objects.
CNSSI 4009-2015 under computer security object
Information object used to maintain a condition of security in computerized environments. Examples are: representations of computer or communications systems resources, security label semantics, modes of operation for cryptographic algorithms, and one-way hashing functions.