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In a narrow sense, computer security refers to the security of personal computers, including operating systems, user passwords, stored data security, etc., such as vulnerabilities, viruses, etc.; Information security mainly refers to the security of stored data, ** information security, such as anti-leakage, anti-tampering, etc., network security mainly refers to the security of the WAN or LAN, such as anti-network attacks. I hope to adopt.
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Computer network security not only includes the hardware of networking, the software that manages and controls the network, but also includes the shared resources and fast network services, so the definition of network security should consider covering all the contents involved in the computer network. Referring to the definition of computer security given by ISO, it is believed that computer network security refers to: "protecting the hardware, software and data resources in the computer network system from being destroyed, altered or leaked due to accidental or malicious reasons, so that the network system can operate continuously and reliably, and the network services are normal and orderly."
Computer network security refers to the use of network management control and technical measures to ensure that the confidentiality, integrity and usability of data are protected in a network environment. Computer network security includes two aspects, namely physical security and logical security. Physical security means that system equipment and related facilities are physically protected from destruction, loss, etc.
Logical security encompasses the integrity, confidentiality, and availability of information.
Potential Threats There are many factors that pose insecurity to computer information, including human factors, natural factors, and accidental factors. Among them, the human factor refers to the fact that some lawbreakers take advantage of the vulnerabilities existing in computer networks, or sneak into computer rooms, steal computer system resources, illegally obtain important data, tamper with system data, destroy hardware equipment, and compile computer viruses. The human factor is the factor that poses the greatest threat to the security of computer information networks.
The insecurity factors of the computer network are mainly manifested in the following aspects:
Confidentiality: The nature of information not to be disclosed to or exploited by unauthorized users, entities, or processes.
Integrity: The nature of the data that cannot be altered without authorization. That is, the information remains unmodified, destroyed and lost during storage or transmission.
Availability: A feature that can be accessed by authorized entities and used on demand. i.e. the ability to access the information you need, when you need it. For example, denial of service in the network environment, disruption of the normal operation of the network and related systems, etc., are all attacks on availability.
Controllability: the ability to control the dissemination and content of information.
Auditability: Provide the basis and means when security problems arise.
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Computer system security refers to the protection of the integrity, usability, and confidentiality of a computer system by protecting the software, hardware, data, and users in a computer system from the threat of unauthorized access, damage, or theft. The primary goal of computer system security is to ensure that the data and resources in a computer system are properly protected while allowing authorized users to access the resources they need.
Computer system security measures include authentication, access control, data encryption, antivirus software, vulnerability patches, etc. These measures can help prevent unauthorized access, malware, data leaks, and other threats, and safeguard the stability and reliability of computer systems.
Cybersecurity refers to the protection of data and resources in a network from damage, theft, or other losses by protecting the network from unauthorized access, attacks, and other threats. Cybersecurity covers a wider range than computer system security, including computer networks, communication networks, the Internet, etc.
Network security measures include network topology design, access control, firewalls, intrusion detection and prevention systems, virtual private networks, encryption technologies, and more. These measures can help protect the network from threats such as unauthorized access, malware, data leaks, and ensure the confidentiality, integrity, and availability of data and resources in the network.
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