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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cryptography Fundamentals | 20% | - Core goals: confidentiality, integrity, authentication, non-repudiation - Historical evolution and modern applications - Basic terminology: plaintext, ciphertext, algorithm, key |
| Topic 2: Asymmetric Encryption & Public Key Infrastructure | 25% | - Principles: public/private key pairs - Digital signatures: purpose and process - Algorithms: RSA, ECC, Diffie-Hellman - Certificate lifecycle: creation, validation, revocation - PKI components: certificates, CAs, trust models |
| Topic 3: Key Management & Secure Protocols | 10% | - Key generation, storage, exchange, and destruction - Cryptographic attacks: brute force, birthday, man-in-the-middle - Secure protocols: TLS/SSL, IPsec, SSH, PGP |
| Topic 4: Implementation & Best Practices | 5% | - Standards and compliance - Common mistakes and vulnerabilities - Selecting appropriate algorithms and key sizes |
| Topic 5: Hash Functions & Data Integrity | 15% | - Uses: integrity checks, password storage, message authentication - Properties: collision resistance, one-way function - HMAC construction and application - Algorithms: SHA-1, SHA-256, SHA-3, MD5 |
| Topic 6: Symmetric Encryption | 25% | - Algorithms: AES, DES, 3DES, Blowfish - Principles and operation - Block vs stream ciphers, modes of operation (ECB, CBC, OFB, CFB) - Key generation, distribution, and management challenges |
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NEW QUESTION # 84
(Why are large prime numbers important in cryptography?)
Answer: A
Explanation:
Large prime numbers are crucial because they enable cryptosystems where certain operations are easy to perform, but reversing them is computationally hard without secret information. In RSA, security is based on the difficulty of factoring a large composite number that is the product of two large primes; multiplying primes is easy, but factoring the product is believed to be hard at sufficient sizes. In Diffie-Hellman and related systems, primes define finite groups (often modulo a large prime) where exponentiation is efficient but the discrete logarithm problem is hard. Primes also help ensure desirable group properties-such as having a large cyclic subgroup-reducing vulnerabilities from small subgroups or weak structure. The value of "large" is that it makes brute-force and known algorithmic attacks infeasible with current computing resources. Large primes do not primarily make encryption faster, nor do they make decryption easier; they are chosen to maximize security margins. While primes can be involved in encoding steps, their importance is security: they form the mathematical foundation for hardness assumptions used by major public-key algorithms. Therefore, the best answer is that they provide security in encryption algorithms.
NEW QUESTION # 85
(Which type of exploit involves looking for different inputs that generate the same hash?)
Answer: C
Explanation:
A birthday attack targets hash functions by exploiting the birthday paradox: collisions (two different inputs producing the same hash output) can be found much faster than brute-forcing a specific preimage. For an n-bit hash, the expected work to findanycollision is on the order of 2
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