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Network Security: Different Types of Services and Mechanisms

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Discover the various types of services and mechanisms used in network security, from firewalls and intrusion detection systems to encryption and access control. In this article, learn how each tool works to protect computer networks and their data from unauthorized access and why they are essential in maintaining the integrity, confidentiality, and availability of sensitive information.

Before moving, let’s take a look at Introduction to Network Security

Table of Contents


Have you ever wondered how message authentication is verified? Do you want to know when an OTP is sent to a registered phone number and how it is validated that entered OTP is the one which was sent to a registered phone number? How does the system verify it? What happens behind the scenes at the security level?

Well, you are at the right place. Here, you will learn about the essential network security services that rely on cryptography. Learn how these mechanisms ensure network communications’ confidentiality, integrity, and authenticity and protect sensitive data from unauthorized access, interception, and tampering.

What are Network Security Services?

Network security services refer to the various mechanisms and protocols to secure communication between two or more networked devices. Cryptography is a critical component of network security services, providing mechanisms for ensuring network communications’ confidentiality, integrity, and authenticity.

Source: AU

What are Security Services In Cryptography?

Security services are various services incorporating cryptography ideas to provide security. It offers multiple types of protection against different types of security threats. Some security services include authentication, data confidentiality, access control, data integrity, and non-repudiation.

The services provide security against unauthorized access, data leaks, and corruption. The services also protect against denial of sending or receiving communication. Cryptography helps implement the services by encrypting messages using mathematical functions. The messages are also retrieved by using mathematical functions.

Features Of Security Services

Encryption – Encryption refers to converting information into another form by implementing a complex code or password (including upper-lower case letters, numbers, and special characters) so that only the sender and receiver can open the information.

Technically it is the process of converting human-readable data to unintelligible text, and in terms of cryptography, the unintelligible data is called ciphertext. Encryption requires a cryptographic key that both the sender and the receiver have. The key is used to encode and decode the message.

Access Control – Access Control refers to the users’ rights to documents. It limits users’ access to which part of the section they can access and which are prohibited. This is implemented with authorization & authentication, which ensures the user’s identity and the data they can access.  

Authentication – Authentication is verifying a user who they are claimed to be. Authentication can be done in various ways, such as 2FA, OTP, Biometric details, and passwords.

Authorization – Authorization checks whether the user has access to a specific section. Authorization helps in implementing access control for the specific section. In each authorization layer, a user is reserved with a right to a specific section.  

Network security is divided as follows:

1. Message Confidentiality

It implies that the substance of a message, when sent across an organization should stay secret, for example, just the planned recipient and nobody else ought to have the option to peruse the message.

In other words, Data confidentiality means protecting a user’s data from unauthorized access. Data confidentiality is important because it can result in unintentional or intentional loss of a user’s privacy. The implementation of data confidentiality is done through data encryption. This encryption is done through various methods which use cryptography to encode the data into an unintelligible form.

2. Integrity

Integrity implies the information should arrive at the objective with no modification in the document. It ensures that data is protected against unauthorized modification. It includes methods like data hashing, digital signatures, checksums, and integrity checks to detect and prevent unauthorized modifications or tampering of data. E.g., if the data is transferred from sender to receiver through a secure network, then any third party should not be able to access the network to modify the document. If any changes occur, the system detects the fault or corruption in the data.

message-integrity - codingstreets
Source: AU

3. Authentication

The collector should be particular about the sender’s personality in message validation. For example, the collector must ensure that the genuine sender is equivalent to the professed-to-be.

Authentication means verifying the identity of a user. Authentication is almost present everywhere. It makes sure that a user is who they claim to be. To provide strong authentication, various cryptography concepts are used. Some ideas include using one-time passwords, password strength detectors, authenticators, and more.

4. Non-repudiation

Non-repudiation means protecting against the denial of sending or receiving during communication. An example where non-repudiation is implemented is a digital signature. Digital signatures are used in online transactions to ensure that after the transaction is over, one cannot deny that they have not sent the information required for the transaction or the authenticity of the signature.

5. Access control

Access control is an essential part of any organization. Access control means preventing everyone from viewing or modifying some data. Access control is implemented in a layered format, where every level of access control has some privileges assigned to it. Authentication is used to enforce access control. It ensures that users belong to a certain level of access control and whether it should allow them to access some data.

6. Availability

Availability means that a network is always available to the users. The availability is guaranteed by periodic hardware and software maintenance. The software and hardware are also upgraded if the need arises. The software and hardware upgrades ensure that the system is always available and that any attempts to take out the network are effectively tackled. The security mechanisms must protect the system from cyber attacks like Dos and DoS.

7. Audit and Monitoring Services

Audit and monitoring services involve the collection, analysis, and monitoring of network and system activities to detect and respond to security incidents or policy violations. They include activities like log analysis, event correlation, intrusion detection systems (IDS), and security information and event management (SIEM) tools to identify suspicious behavior or anomalies.

8. Intrusion Detection and Prevention Services

These services monitor network traffic and system activities to detect and prevent unauthorized access attempts, intrusions, or malicious activities. Intrusion detection systems (IDS) and intrusion prevention systems (IPS) are used to identify and respond to security threats in real-time.

9. Vulnerability Assessment and Penetration Testing Services

These services involve assessing and identifying vulnerabilities in networks, systems, and applications to proactively address weaknesses. Vulnerability scanning tools and penetration testing techniques are employed to uncover security flaws and recommend appropriate remediation measures.

10. Security Incident Response Services

Incident response services focus on handling and mitigating security incidents effectively when they occur. They involve developing incident response plans, establishing incident response teams, and implementing processes to detect, analyze, contain, and recover from security breaches or incidents.

Relationship Between Security Services And Mechanisms

Security services and mechanisms are interrelated and work together to provide a secure environment for data and information. Security services are the goals that need to be achieved, while security mechanisms are the means to achieve those goals.

Security services are the desired outcomes that organizations want to achieve, such as confidentiality, integrity, availability, authentication, and non-repudiation. Confidentiality ensures that data remains private and protected from unauthorized access, while integrity ensures data is accurate and has not been tampered with. Availability ensures that data and resources are accessible when needed, while authentication ensures that users and devices are who they claim to be. Non-repudiation ensures that a user cannot deny acting.

On the other hand, security mechanisms are the tools, techniques, and protocols used to implement security services. These include encryption, access controls, firewalls, intrusion detection and prevention systems, biometrics, etc. Encryption is a popular security mechanism used to achieve confidentiality, while access controls ensure that only authorized users have access to data and resources. Firewalls and intrusion detection and prevention systems protect against unauthorized access and attacks, while biometrics provide authentication and non-repudiation.

In summary, security services are the goals that organizations want to achieve, and security mechanisms are the means to achieve those goals. Organizations can use appropriate security mechanisms to ensure their data and information are protected and secure from unauthorized access and attacks.


Network security is becoming increasingly important for individuals, organizations, and governments as technology advances. This article discusses various types of network security services and mechanisms used to protect networks from threats.

We started by discussing forms of network security, which helps to prevent unauthorized access to networks by monitoring and controlling incoming and outgoing traffic.

Later, we discussed authentication and authorization mechanisms such as biometric authentication, two-factor authentication, and access control. These mechanisms help to ensure that only authorized individuals have access to network resources and data.

Overall, network security is a complex and constantly evolving field. By understanding the different types of network security services and mechanisms, individuals and organizations can take steps to protect their networks from various types of threats.

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