Cyber Security Kriptografi Modern

Introduction to modern cryptography, covering topics such as the hierarchy of protocols, network security, confidentiality, integrity, encryption techniques, message digest, hash functions, and authentication.

An overview of modern cryptography, including block and stream ciphers, encryption operations, key generation, and the collaboration of elements to create a secure network protocol.

Discussion on classical cryptography, pre-digital computer era, focusing on text and key encryption using characters or bits and operations in bit mode.

Explanation of bitwise operations in cryptography, specifically XOR operation, its properties, laws, and applications in simple XOR ciphers.

Details on XOR operation in modern cryptography, its notation, examples, and application in encryption algorithms like simple XOR cipher.

Overview of encryption algorithms like XOR cipher, including encryption principles, key usage, encryption process, and file encryption examples.

Explanation of stream cipher operation, including continuous encryption of plaintext to ciphertext byte by byte using a key stream generated by a key generator.

Description of feedback shift register, a cryptographic structure used for generating key streams based on internal state and feedback function.

Discussion on block cipher operation, where data is processed in blocks for encryption and decryption, maintaining the block size for both plaintext and ciphertext blocks.

Explanation of the ECB mode in block cipher operation, where each plaintext block is encrypted into a corresponding ciphertext block using the same key for every block.

Explanation of Electronic Codebook (ECB) mode and its lack of flexibility in processing blocks individually. Introduction to Cipher Block Chaining (CBC) mode and its enhancement in security compared to ECB. Initialization Vector importance in ensuring unique encryption for repetitive messages. Weak encryption method using XOR operation and bit shifting.

Description of how CBC mode addresses the limitations of ECB by chaining blocks together and XOR operation with Initialization Vector. Enhanced security due to block interdependence in encryption process.

Similar to CBC mode but with the decryption process reversing the encryption. Advantages in speed and data encryption security.

Instructions for individual assessment involving the use of stream cipher, XOR operation, block division, and cipher calculation. Deadline to submit handwritten solutions via WhatsApp group.