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British Security Co-ordination ( BSC) was a covert organisation set up in New York City by the British Secret Intelligence Service (MI6) in May 1940 upon the authorisation of the Prime Minister, Winston Churchill .
Binary Synchronous Communication ( BSC or Bisync) is an IBM character-oriented, half-duplex link protocol, announced in 1967 after the introduction of System/360. It replaced the synchronous transmit-receive (STR) protocol used with second generation computers. The intent was that common link management rules could be used with three different character encodings for messages.
The packet control unit (PCU) is a late addition to the GSM standard. It performs some of the processing tasks of the BSC, but for packet data. The allocation of channels between voice and data is controlled by the base station, but once a channel is allocated to the PCU, the PCU takes full control over that channel.
In computer systems security, role-based access control ( RBAC) [1] [2] or role-based security [3] is an approach to restricting system access to authorized users, and to implementing mandatory access control (MAC) or discretionary access control (DAC). Role-based access control is a policy-neutral access control mechanism defined around roles ...
Attribute-based access control is sometimes referred to as policy-based access control ( PBAC) or claims-based access control ( CBAC ), which is a Microsoft-specific term. The key standards that implement ABAC are XACML and ALFA (XACML). [4]
In physical security and information security, access control ( AC) is the selective restriction of access to a place or other resource, while access management describes the process.
In computer security, organization-based access control ( OrBAC) is an access control model first presented in 2003. The current approaches of the access control rest on the three entities ( subject, action, object) to control the access the policy specifies that some subject has the permission to realize some action on some object.
In computer security, discretionary access control ( DAC) is a type of access control defined by the Trusted Computer System Evaluation Criteria [1] (TCSEC) as a means of restricting access to objects based on the identity of subjects and/or groups to which they belong.
In computer security, lattice-based access control ( LBAC) is a complex access control model based on the interaction between any combination of objects (such as resources, computers, and applications) and subjects (such as individuals, groups or organizations).
In computer security, mandatory access control ( MAC) refers to a type of access control by which a secured environment (e.g., an operating system or a database) constrains the ability of a subject or initiator to access or modify on an object or target. [1]