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Within the U.S. government, security clearance levels serve as a mechanism to ascertain which individuals are authorized to access sensitive or classified information. These levels often appear in employment postings for Defense related jobs and other jobs involving substantial amounts of responsibility, such as air traffic control or nuclear ...
A United States security clearance is an official determination that an individual may access information classified by the United States Government.Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.
In cryptography, security level is a measure of the strength that a cryptographic primitive — such as a cipher or hash function — achieves. Security level is usually expressed as a number of "bits of security" (also security strength), [1] where n-bit security means that the attacker would have to perform 2 n operations to break it, [2] but other methods have been proposed that more ...
A United States security clearance is an official determination that an individual may access information classified by the United States Government. Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.
FIPS 140-2 defines four levels of security, simply named "Level 1" to "Level 4". It does not specify in detail what level of security is required by any particular application. FIPS 140-2 Level 1 the lowest, imposes very limited requirements; loosely, all components must be "production-grade" and various egregious kinds of insecurity must be ...
The lower-level L clearance is sufficient for access to Secret Formerly Restricted Data and National Security Information, as well as Confidential Restricted Data and Formerly Restricted Data. [58] In practice, access to Restricted Data is granted, on a need-to-know basis, to personnel with appropriate clearances.
The security policy must be explicit, well-defined, and enforced by the computer system. Three basic security policies are specified: [6] Mandatory Security Policy – Enforces access control rules based directly on an individual's clearance, authorization for the information and the confidentiality level of the information being sought.
The operative aims form the security level to be reached. The security level is checked permanently against the current status of the security software used (malware scanner, update/patch management, vulnerability scanner, etc.). Deviations can be recognised at an early stage and adjustments made to the security software.