PINNACLEProf. Bhagyashri Thorat
SPPU TE E&TC + career304195 (Elective II), TE Sem VI, 2019 courseमराठी + English

Network Security & Cybersecurity basics

Prof. Thorat is a Cisco-certified cybersecurity educator and faculty coordinator of the Shunya Shield Cybersecurity Club at I²IT. This hub pairs the SPPU Network Security syllabus with her practical explainers on ransomware, phishing, zero trust and firewalls.

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The syllabus begins with why security is needed and the types of attacks, then builds up cryptography: classical substitution and transposition, symmetric block ciphers (DES, AES), public-key systems (RSA, Diffie–Hellman), and message authentication with hashes, MACs and digital signatures. The last two units apply this to e-mail, IPsec and web security.

Real-world examples make the units easier to remember. Her Marathi videos on ransomware and double extortion, AI-driven phishing and deepfakes, evil-twin Wi-Fi attacks and zero-trust architecture connect each concept to something students see every day.

Syllabus

SPPU syllabus units (2019 course)

  1. Unit I: Attacks on Computers and Computer Security

    Need for security, security approaches and principles, types of attacks, security services and mechanisms, a model for network security.

  2. Unit II: Cryptography: Concepts and Techniques

    Plain text and cipher text, substitution and transposition techniques, encryption and decryption, symmetric and asymmetric keys, steganography, key range and size, types of attacks.

  3. Unit III: Symmetric and Asymmetric Key Ciphers

    Block cipher principles, DES, AES, Blowfish, modes of operation, stream ciphers and RC4, key distribution, public-key principles, RSA, Diffie–Hellman, ECC.

  4. Unit IV: Message Authentication and Hash Functions

    Authentication requirements, MACs, hash functions, SHA, HMAC, CMAC, digital signatures, Kerberos, X.509, PKI, biometric authentication.

  5. Unit V: E-Mail Security

    PGP, S/MIME, IP security overview and architecture, authentication header, encapsulating security payload, security associations, key management.

  6. Unit VI: Web Security

    Web security considerations, SSL/TLS, secure electronic transactions, intruders and intrusion detection, password management, viruses and countermeasures, firewall design and types, cross-site scripting.

Unit titles follow the SPPU TE E&TC 2019-course syllabus for Network Security (Elective II). Check your college's copy for any revision.

Free lessons

Videos for this subject

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नेटवर्क सुरक्षा | SPPU युनिट 1 संगणक आणि संगणक सुरक्षा वर हल्ला | मराठी | एक शॉट |

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Full playlists

FAQ

Questions students ask

Is there an insem-focused playlist?
Yes. The Network Security Insem Special playlist (7 videos) focuses on the in-semester units.
What is the difference between steganography and cryptography?
Cryptography scrambles a message so it cannot be read; steganography hides the fact that a message exists, for example inside an image. Her video on steganography vs watermarking explains a related comparison.
What is zero trust?
Zero trust means no user or device is trusted automatically, even inside the network. Every request is verified (“never trust, always verify”). There is a full Marathi explainer on the channel.
How does a firewall decide what to block?
A firewall compares traffic against rules (addresses, ports, protocols and, in newer firewalls, applications) and allows or blocks it. The Marathi firewall lecture covers types and design principles from Unit VI.
Can students join cybersecurity activities?
At I²IT, Prof. Thorat coordinates the Shunya Shield Cybersecurity Club, which organises expert sessions and CTF participation.

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