mandatory access control vs discretionary access control

Cacls Displays or modifies any access control list (DACL) file. Grammar cacls FileName [/t] [/e] [/c] [/g user:permission] [/R User [...]]][/P User:permission [...]] [/D User [...]] Parameters FileName Necessary. Displays the DACL for the specified file. /t Changes the DACL for the specified file in the current directory and all subdirectories. /e Edit the DACL instead of replacing it. /C Ignore the error

Unlike traditional autonomous access control, Mandatory Access Control provides higher security. SELinux is a representative of the mandatory access

This article mainly describes the new important security mechanism in the FreeBSD 5.0 operating system, that is, the use of mandatory access control mechanism (MAC) and source code analysis, including mandatory access control fram

Almost certainly everyone has heard of SELinux (more accurately, tried to shut down), and even some past experience has made you biased against SELinux. But with the growing 0-day security hole, maybe it's time to get to know about this mandatory access control system (MAC) in the Linux kernel, and we'll encounter problems with SELinux

In traditional UNIX systems, DAC protection measures include file access mode and access control list, while MAC provides process control and firewall. The TrustedBSD program combines the core FreeBSD release with trusted security components that comply with the information technology security assessment standard (ITSE

identifiers (user_t and passed_t), and there are also object classes (process). However, without permission, we have a third-party identity, the default identifier (passwd_t).The type_transition rule is used for several different targets that are related to the default identity of the table. For now, we are concerned with the type_transitin of the process as his object class. Such a rule results in a default domain conversion to try. Type_transition shows that, by default, in a exece () system

Type enforcement (Type Mandatory Access Control), enforcement (1) Introduction In SELinux, all access requests must be explicitly agreed. SELinux has no access by default, regardless of the Linux User ID and group ID. Yes, this means that no default Super User exists in SEL

In traditional UNIX systems, DAC protection measures include file access mode and access control list, while MAC provides Process Control and firewall. The TrustedBSD Program combines the core FreeBSD release with trusted security components that comply with the information technology security assessment standard (ITSE

Typeenforcement (Type-based Mandatory Access Control) (1) Introduction In SELinux, all access requests must be explicitly agreed. SELinux has no access by default, regardless of the Linux User ID and group ID. Yes, this means that no default Super User exists in SELinux, unl

Oracle mandatory access control is a basic security feature that must be implemented by B1-level security products. We all know the mandatory access and control functions of DM-related database security edition, it studies and dra

Mandatory Access Control System in Linux KernelAppArmorBecause I recently studied the implementation of the OJ (oline judge) Background security module, I have been studying the sandbox in Linux and found that Apparmor can provide access control.AppArmor (Application Armor) is a security module of the Linux kernel. App

To address the standard "user-group-other/read-write-execute" permissions, as well as restrictions on access control lists and enhanced security mechanisms, the National Security Agency (NSA) has designed a flexible access control (mandatory) method SELinux (Security enhance

This article mainly describes the new important security mechanism in the FreeBSD 5.0 operating system, that is, the use of mandatory access control mechanism (MAC) and source code analysis, including mandatory access control fram

parameter cred, which is the user's corresponding label, such as Cred->cr_label here, and the specific data related to this principal and Mac policy in this tag, such as the struct Mac_biba *SUBJ. The object's "label" can be found from the Access object (such as the VP here), and the object corresponds to the specific data related to the MAC policy, such as the struct Mac_biba * obj here. With these two specific data specific to the principal

, session. So basically the SID can be understood as a user name, a group name, a session name. It's just that they are safely certified and not duplicated, which is safe and reliable. If we mention Zhang San this user's SID, then we can be understood as "Zhang San (true)". Security descriptors (Safety descriptor) MSDN says the security descriptor contains security information that describes a securable object. In fact, this sentence is very right, but it is probably on the. Let'

reliable. If we mention the SID of Michael, we can understand it as "Michael (real)". Security descriptors (Security Descriptor) Msdn says the Security Descriptor contains the security information that describes a security object. In fact, this sentence is correct, but it is probably true. Let's take a look at what the security descriptor describes? Security descriptors include: 1. Sid of the owner of the security object associated with the security descriptor and Sid of the main group of t

name. It's just that they are safely certified and not duplicated, which is safe and reliable. If we mention Zhang San this user's SID, then we can be understood as "Zhang San (true)". Security descriptors (Safety descriptor) MSDN says the security descriptor contains security information that describes a securable object. In fact, this sentence is very right, but it is probably on the. Let's look at exactly what the security descriptor describes? Security descriptors include: 1

-Role assigned URA97 (User Role Assignment 97 ). This topic discusses how to assign roles to users, including rule role assignment and management role assignment. A user can have both rule roles and management roles. (2) license-Role Assignment PRA97 (Permission Role Assignment 97 ). This article mainly discusses the assignment and cancellation of licenses, including rule license assignment and Management license assignment. From the perspective of roles, users and licenses share the same featur

User Root in Linux, so it is not restricted by DAC. Second, DAC cannot prevent Trojans. For example, a Trojan horse has been hidden in a program approved by the user, this program may cause harm to the computer system. Thirdly, the DAC control granularity is coarse and cannot effectively implement fine-grained access control.The Android system is based on Linux. At the android kernel layer, Android adopts

The concept of permissions believe you are no stranger, then how to set a file access rights? Can the program implement dynamic control file permission information? The answer is yes,. NET can do this. The Discretionary access Control List (sometimes abbreviated as ACLs) is