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| Section | Objectives |
|---|---|
| Hashing and Digital Signatures | - Digital Signature Standards - Message Authentication Codes (MAC) - Hash Functions (MD5, SHA-1, SHA-256) |
| Cryptography Fundamentals | - Symmetric vs Asymmetric Encryption - History and Evolution of Cryptography - Cryptographic Terminology |
| Applied Cryptography | - VPN Security - SSL/TLS Protocols - PGP and Email Encryption - Cryptographic Best Practices |
| Cryptanalysis and Attacks | - Common Attack Vectors - Social Engineering Prevention - Brute Force and Dictionary Attacks |
| Asymmetric Cryptography | - RSA Algorithm - Diffie-Hellman Key Exchange - Elliptic Curve Cryptography (ECC) - Public Key Infrastructure (PKI) |
| Symmetric Cryptography | - Stream Ciphers - Block Ciphers (AES, DES, 3DES) - Initialization Vectors (IV) - Key Management |
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NEW QUESTION # 13
(What is an attribute of RC4 when used with WEP?)
Answer: D
Explanation:
In classic WEP deployments, RC4 was used with what is commonly called "40-bit WEP" (also labeled
"64-bit WEP" because it combines a 40-bit secret key with a 24-bit IV to form a 64-bit RC4 seed). The key attribute emphasized in many foundational descriptions of WEP is this 40-bit shared secret length, which was originally chosen due to export restrictions and legacy constraints. Although "104-bit WEP" (sometimes called "128-bit WEP," again counting the 24-bit IV) also existed, the option set here points to the historically standard and widely referenced attribute: a 40-bit key when RC4 is used in WEP.
Importantly, WEP's security failure is not only about key size; the 24-bit IV is too small and repeats frequently, and WEP's key scheduling vulnerabilities combined with IV reuse allow attackers to recover the secret key with enough captured frames. Still, among the given options, the correct attribute is the 40-bit key.
NEW QUESTION # 14
(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 # 15
(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 t o find any collision is on the order of 2
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