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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Key Management & Secure Protocols | 10% | - Key generation, storage, exchange, and destruction - Secure protocols: TLS/SSL, IPsec, SSH, PGP - Cryptographic attacks: brute force, birthday, man-in-the-middle |
| Topic 2: Implementation & Best Practices | 5% | - Common mistakes and vulnerabilities - Standards and compliance - Selecting appropriate algorithms and key sizes |
| Topic 3: Symmetric Encryption | 25% | - Key generation, distribution, and management challenges - Block vs stream ciphers, modes of operation (ECB, CBC, OFB, CFB) - Principles and operation - Algorithms: AES, DES, 3DES, Blowfish |
| Topic 4: Asymmetric Encryption & Public Key Infrastructure | 25% | - Certificate lifecycle: creation, validation, revocation - Principles: public/private key pairs - PKI components: certificates, CAs, trust models - Algorithms: RSA, ECC, Diffie-Hellman - Digital signatures: purpose and process |
| Topic 5: Hash Functions & Data Integrity | 15% | - HMAC construction and application - Uses: integrity checks, password storage, message authentication - Properties: collision resistance, one-way function - Algorithms: SHA-1, SHA-256, SHA-3, MD5 |
| Topic 6: Cryptography Fundamentals | 20% | - Basic terminology: plaintext, ciphertext, algorithm, key - Core goals: confidentiality, integrity, authentication, non-repudiation - Historical evolution and modern applications |
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NEW QUESTION # 67
(Which cryptographic operation uses a single key?)
Answer: A
Explanation:
Symmetric cryptography uses a single shared secret key for both encryption and decryption. This contrasts with asymmetric cryptography, which uses a key pair (public/private). Symmetric algorithms (like AES, ChaCha20) are efficient and well-suited for bulk data encryption, but they require a secure method for key distribution because both parties must possess the same secret. Hashing is not a keyed operation by default (though HMAC is keyed); it maps arbitrary data to a fixed-size digest and is primarily used for integrity checking, fingerprints, and password hashing constructions. Padding is a data formatting technique (e.g., PKCS#7) used to align plaintext to a block size; it is not a cryptographic "operation" that uses a key.
Therefore, the cryptographic operation characterized by using one key shared between parties is symmetric encryption. In real systems, symmetric encryption is frequently combined with asymmetric methods for key exchange and with MACs/AEAD for integrity, producing the standard hybrid approach used in protocols like TLS and IPsec.
NEW QUESTION # 68
(What is a focus of the ISO/IEC 27001 standard?)
Answer: B
Explanation:
ISO/IEC 27001 is an international standard for establishing, implementing, maintaining, and continually improving an Information Security Management System (ISMS). Its focus is not inventing cryptographic algorithms, but managing information security through a structured governance approach: identifying assets, assessing risks, selecting and implementing controls, measuring effectiveness, and continuously improving.
The standard emphasizes a risk-based methodology-controls are chosen based on organizational context and threat landscape, and the ISMS is refined over time through audits, management reviews, and corrective actions. While cryptography can be part of the control set (e.g., encryption policies, key management, secure communications), ISO/IEC 27001 addresses a broad range of security domains beyond crypto, including physical security, access control, incident management, supplier relationships, and business continuity. It also does not enforce criminal penalties; it is a certification/management standard. And it is not limited to network security. Therefore, the correct focus is risk management and continuous improvement of information security.
NEW QUESTION # 69
(How can auditing enhance an organization ' s cryptographic practices?)
Answer: D
NEW QUESTION # 70
(Which type of exploit involves looking for different inputs that generate the same hash?)
Answer: D
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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