Cryptography And Network Security Atul Kahate Ppt Jun 2026

Confidentiality, Integrity, and Availability.

Ensuring system resources remain accessible always. Security Mechanisms

Based on the difficulty of factoring large prime numbers.

Alice's Side ┌───────────┐ ┌───────────────┐ ┌────────────┐ ┌───────────┐ │ Message ├────►│ Hash Function ├────►│ Encryption ├────►│ Digital │ └─────┬─────┘ └───────────────┘ └─────▲──────┘ │ Signature │ │ │ └─────┬─────┘ │ ┌────┴────┐ │ │ │ Alice's │ │ │ │PrivateKey│ │ │ └─────────┘ │ └───────────────────────┬──────────────────────────────────┘ ▼ Network Transit Module 7: Network Security Applications Key Management and Distribution cryptography and network security atul kahate ppt

Accepts messages of any arbitrary bit length. Fixed output: Produces a small, fixed-size hash value.

Flags abnormal behavior deviations from baselines.

Interception of data (e.g., eavesdropping) without altering it. Confidentiality, Integrity, and Availability

Skipped entirely during the final execution round. Add Round Key XOR operation: Links state array bits with subkey bits.

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Eavesdropping or monitoring data transmissions. Interception of data (e

Cascading rotors exponentially increase period length. Steganography Hidden existence: Conceals the presence of the message. Character marking: Uses invisible ink or pin punctures. Invisible ink: Writing becomes visible only when heated.

: Network layer security via Authentication Header (AH) and Encapsulating Security Payload (ESP) in Transport and Tunnel modes. Module 6: System Security and Firewalls