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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Symmetric Encryption | 25% | - Principles and operation - Block vs stream ciphers, modes of operation (ECB, CBC, OFB, CFB) - Algorithms: AES, DES, 3DES, Blowfish - Key generation, distribution, and management challenges |
| Topic 2: Key Management & Secure Protocols | 10% | - Cryptographic attacks: brute force, birthday, man-in-the-middle - Secure protocols: TLS/SSL, IPsec, SSH, PGP - Key generation, storage, exchange, and destruction |
| Topic 3: 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 4: Cryptography Fundamentals | 20% | - Historical evolution and modern applications - Core goals: confidentiality, integrity, authentication, non-repudiation - Basic terminology: plaintext, ciphertext, algorithm, key |
| Topic 5: Implementation & Best Practices | 5% | - Standards and compliance - Selecting appropriate algorithms and key sizes - Common mistakes and vulnerabilities |
| Topic 6: Asymmetric Encryption & Public Key Infrastructure | 25% | - PKI components: certificates, CAs, trust models - Principles: public/private key pairs - Digital signatures: purpose and process - Algorithms: RSA, ECC, Diffie-Hellman - Certificate lifecycle: creation, validation, revocation |
>> Introduction-to-Cryptography Real Questions <<
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NEW QUESTION # 94
(How is Public Key Infrastructure (PKI) commonly utilized in web browsers?)
Answer: D
Explanation:
Web browsers rely on PKI to establish trust in secure connections, primarily through X.509 certificates and a built-in set of trusted root Certificate Authorities (CAs). When a browser connects to an HTTPS site, the server presents a certificate chain. The browser validates that chain up to a trusted root, checks that the certificate is valid for the domain (SAN/CN matching), confirms validity dates, and may check revocation status. This PKI process allows browsers to authenticate the website's identity and negotiate encrypted session keys for TLS, enabling confidentiality and integrity for the connection. In practical terms, the browser' s PKI components include certificate stores, validation logic, and mechanisms for handling intermediates, trust policies, and revocation. While PKI supports authentication as an outcome, the best description of how browsers utilize PKI is that they manage and validate digital certificates and associated keys to establish trust.
PKI is not about compressing messages or encrypting data at rest; it is about identity binding and trust chains that make secure web communication possible.
NEW QUESTION # 95
(Which type of exploit involves looking for different inputs that generate the same hash?)
Answer: A
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 t o find any collision is on the order of 2
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