Definition of Security (Classical)
		¨ Security is usually divided into: – Confidentiality: preventing disclosure to unauthorized users – Integrity: Ensuring that no one can tamper with good information. – Availability: Ensure that access to information can be promptly obtained by authorized users. ¨ Informally, people generally use security to mean confidentiality. ¨ Note the context-dependent value judgments!
	600.436 High- Assurance Systems
				Fall 01/Introduction		17