“…MLS was developed by US Military in 1970 [10], that is considered one of the computer applications that protects data in Operating Systems, Networks and Databases by classifying data and users to different security levels. Many organizations utilize MLS security during its operation, such that SELinux [11], Oracle Label Security (OLS)[12], MLChat[13] and cloud security [14]. Actually, there are four levels of security: Top Secret (TS), Secret (S), Confidential (C), Unclassified (U).…”