Final answer:
The simple property of Biba is 'No write up', which prevents subjects at lower integrity levels from writing to objects at higher levels to maintain data integrity.
Step-by-step explanation:
The implied meaning of the simple property of Biba is No write up. This principle is part of the Biba Integrity Model, a formal state transition system of computer security policy that deals with integrity levels and the prevention of data corruption or loss. In this context, 'No write up' means a subject (e.g., a process or user) at a lower integrity level cannot write to an object at a higher integrity level, thereby preventing corruption of more trusted data. For example, in a computer system, a user can read and access data from the operating system but cannot read or access data from other users or higher-level processes.