Network Security
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The document discusses various aspects of network security including cryptography, steganography, cyber crimes, ethical hacking, firewalls, and security mechanisms. It defines cryptography as the security rendered towards a network and describes different types of cryptography such as substitution ciphers, transposition ciphers, secret key cryptography, and public key cryptography. The document also covers cyber crimes, security threats, and the importance of security across different computing environments.
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Network Security
- 1. The Security that we render towards a NETWORK is called Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 2. 1. Cryptography 2. Types of Cryptography 3. Steganography 4. Cyber Crime/Attack 5. Ethical Hacking 6. Fire Walling 7. Security Mechanisms 8. Security Services 9. Security Threats Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 3. CRYPTOGRAPHY SUBSTITUTION CIPHERS (replaces the original text with secret text, keeping the order as it is) TRANSPOSITION CIPHERS (replaces the original text with secret text, but changing its order) Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 4. Plain Text Letters: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Cipher Text Letters: Q W R T Y U I O P A S D F G H J K L Z X C V B N M The text MEET ME AFTER SCHOOL BEHIND THE GYM Is converted as DTTZD TQYZT KLEIG GSWTI OFRZI TUNDM Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 5. The text MEET ME AFTER SCHOOL BEHIND THE GYM Is converted as EAMTN FTDIE EHTER HMEMB YESCG LOHO Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 6. 1.SECRET KEY CRYPTOGRAPHY 2.PUBLIC KEY CRYPTOGRAPHY Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 7. Plain Text Cipher Text Cipher text Plain Text Key Encryption Decryption Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 8. Encryption Plain Text Cipher Text Cipher text Plain Text Decryption Public Key Private Key Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 9. (Crime is an illegal act if it is done in NETWORKING it is CYBER CRIME)
- 10. Security System that protect your PCs or NETWORK from HACKERS,INTRUDERS &MALICIOUS CODE Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 11. A mechanism that is designed to detect, prevent, or recover from a security attack Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 12. 1. Normal Flow 2. Interruption 3. Interception 4. Modification 5. Fabrication Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 13. SECURITY THREATS PASSIVE ATTACKS (In this the goal of the attacker is to obtain information that is being transmitted) ACTIVE ATTACKS (These attacks involve some modification of the Original Data Stream or creation of False Stream) Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 14. CONCLUSION Security is to be given to each and every Environments whether it is our Personal Computing Environment (or) Time Sharing Environment (or) Client-Server Environment (or) Distributed Computing Environment. Bh Durga Adithya Varma , CSE-A , 12N31A0532
- 15. Bh Durga Adithya Varma , CSE-A , 12N31A0532