FET Blogs
FET Blogs
29 June 2026
Table of Contents
Security is a fundamental concept in the design and operation of modern systems.
Historically, many companies used to take a reactive approach to adding security measures after their systems were already built.
This resulted in vulnerabilities being discovered too late, which required continuous patching of systems and additional operational costs.
Security engineers integrate protection directly into the systems’ design and development using engineering principles to develop strong infrastructure that can foresee, resist, and adapt to attacks.
This blog talks about security engineering in detail, along with encryption and cryptography methods.
A branch of cybersecurity, security engineering focuses on designing, implementing, and managing security measures that safeguard an organisation's digital assets, systems, and data.
It performs various functions, such as identifying and assessing risks, developing secure system architectures, managing vulnerabilities, and preparing effective incident response strategies to address security threats.
Modern security engineering encompasses a broad range of disciplines and technologies, such as security architecture, network defence, firewalls, and encryption technologies, to ensure the confidentiality, integrity, and availability of information.
The core components of modern security engineering are as follows:
| Component | Purpose | Key Activities |
| Risk Assessment and Management | Identify and reduce security risks before they impact systems or data. |
|
| Security Design and Implementation | Build secure systems, networks, and applications that can withstand cyber threats. |
|
| Threat Modeling | Understand potential attack paths and weaknesses within an organization's environment. |
|
| Threat Intelligence and Response | Detect emerging threats and respond proactively to minimize risk. |
|
| Incident Response and Recovery | Minimize the impact of security incidents and restore normal operations quickly. |
|
| Compliance and Auditing | Ensure security practices meet legal, regulatory, and industry requirements. |
|
| Security Testing and Validation | Verify the effectiveness of security controls and identify weaknesses. |
|
Cryptography protects confidential information from tampering, unauthorized access, and exposure.
According to the 2022 Global Encryption Trends Study by Ponemon Institute, organizations are increasingly implementing encryption techniques, with 62% having a strategy in place.
The importance of cryptography in security engineering is discussed below:
| Use | Description | How cryptography enables it |
| Authentication | Verifies the identity of users, devices, and systems before granting access. | Uses digital signatures, passwords, public-key infrastructure (PKI), and multi-factor authentication (MFA) to confirm identities and prevent impersonation. |
| Confidentiality | Ensures that sensitive information is accessible only to authorized parties. | Encrypts data using algorithms to prevent unauthorized users from reading information during storage or transmission. |
| Integrity | Ensures that data remains accurate and unaltered throughout its lifecycle. | Implements hash functions to generate unique values that reveal any unauthorized changes to the data. |
| Non-repudiation | Prevents individuals from denying their actions in a digital transaction or communication. | Relies on digital signatures and cryptographic certificates to provide verifiable proof of the sender's identity and actions. |
Although some hybrid systems do exist, cryptography is mainly categorized into three main types, which are as follows:
| Type of cryptography | How it works | Benefits | Examples |
| Symmetric Key Encryption | Uses a single shared key to both encrypt and decrypt data. The sender and recipient must possess the same secret key, which is securely exchanged before communication begins. |
Fast processing speed, efficient for large volumes of data, lower computational requirements, and suitable for real-time encryption. |
|
| Asymmetric Key Encryption | Uses a pair of keys; a public key for encryption and a private key for decryption. The public key can be shared openly, while the private key remains confidential with the owner. |
Enhanced security, simplified key distribution, supports digital signatures, authentication, and secure key exchange. |
|
| Hash functions | Converts data of any size into a fixed-length output known as a hash or digest. Unlike encryption, hashing is designed to be a one-way process. The original data cannot feasibly be recovered from the resulting hash. |
Ensures data integrity, supports secure password storage, enables digital signatures, and helps detect unauthorized modifications. |
|
The mathematical principles used in cryptography help ensure the confidentiality, integrity, and authenticity of data.
The fundamentals of crypto mathematics is based on encryption. The process of encryption transforms readable information (plaintext) into an unreadable format (ciphertext).
End-to-end encryption or E2EE is a process of encoding the data using crypto mathematics so that it remains private from the moment it leaves your device and until it reaches the recipient.
Many messaging apps, emails, and collaboration tools use E2EE to keep your sensitive communications from interception and unauthorized access.
Most end to end encryption systems use symmetric and asymmetric encryption. Asymmetric encryption is used to securely exchange encryption keys, while symmetric encryption is used to encrypt and decrypt the actual data quickly.
Modern security systems help protect people, business assets, facilities, and sensitive information.
These systems utilize a range of protective barriers, checks and balances to recognize when an incident is taking place and take the appropriate action to stop it or to minimize its impact.
The different types of modern security systems are as follows:
| Security system | Primary application | Key benefits |
| Surveillance Systems | Surveillance systems monitor and record activities across business premises using CCTV cameras and video monitoring technologies. |
|
| Intrusion Detection Systems (IDS) | Intrusion detection systems detect unauthorized access attempts through motion sensors, door and window sensors, infrared detectors, and glass-break sensors. |
|
| Access Control Systems | Access control systems regulate and restrict entry to sensitive areas through keycards, biometric authentication, PIN codes, and mobile credentials. |
|
| Fire Safety Systems | Fire safety systems detect and respond to fire-related hazards through smoke detectors, heat sensors, alarms, and sprinkler systems. |
|
| Commercial Alarm Systems | Commercial alarm systems provide centralized monitoring and alerting by integrating intrusion detection, fire safety, and surveillance technologies. |
|
| Visitor Management Systems | Visitor management systems register, monitor, and track visitors entering an organization's premises while maintaining accurate access records. |
|
| Smart IoT Security Systems | Smart IoT security systems connect security devices through cloud platforms, mobile applications, and AI-powered technologies for real-time monitoring and automation. |
|
As technology continues to evolve, security challenges are becoming more sophisticated and widespread.
Thus, not only must students grasp this concept, but they also must gain expertise in the design and implementation of secure systems.?
To learn more about topics such as cryptography, network security, risk management, and secure system design, explore the cybersecurity programs offered by JAIN (Deemed-to-be University).
These programs provide structured learning opportunities for students interested to build expertise in this field.
A1: The four common types of security are physical security, network security, application security, and information security. Together, they help protect people, systems, devices, and sensitive data from threats and unauthorized access.
A2: Yes. Security engineering is a promising career due to the growing demand for cybersecurity professionals across industries. It offers strong job prospects, competitive salaries, and opportunities for continuous learning and advancement.
A3: Yes. Basic to intermediate coding skills are often required for tasks such as automation, vulnerability assessment, security testing, and tool development. Knowledge of scripting languages can be particularly beneficial.
A4: Yes. Python is one of the most widely used programming languages in security engineering. It is commonly used for automation, security analysis, penetration testing, log analysis, and developing cybersecurity tools.
A5: The starting average salary of a security engineer ranges from INR 7.1 to 10 LPA. With more experience, stronger skillset and higher qualifications, one can earn up to INR 16 LPA.
Popular Post
Ask an Expert for Free