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WGU Introduction to Cryptography HNO1 Sample Questions (Q90-Q95):

NEW QUESTION # 90
(Which operation can be performed on a certificate during the "Issued" stage?)

A. Key recovery
B. Creation
C. Key archiving
D. Distribution

Answer: D

Explanation:
The "Issued" stage in a certificate lifecycle indicates that the certificate has been generated and signed by the issuing CA and is now valid for use (subject to validity dates, policy constraints, and revocation status). At this point, the operational focus shifts from creating the certificate to making it available to the subject and relying parties. "Distribution" is the lifecycle activity most directly associated with an issued certificate:
installing it on servers or endpoints, provisioning it into keystores, publishing it to directories if required, and ensuring the chain (intermediates) is accessible for validation. By contrast, "Creation" is earlier in the process (key generation, CSR creation, identity validation, issuance/signing). "Key recovery" and "key archiving" relate to private key management and escrow policies (often for encryption keys, not signing keys), and are governed by organizational policy and key management systems rather than the certificate's issued state itself.
A certificate can be distributed after issuance regardless of whether any key escrow features exist. Therefore, the operation that fits the certificate's "Issued" stage best is distribution of the issued credential for operational use.

NEW QUESTION # 91
(How does adding salt to a password improve security?)

A. Salt ensures two people do not have the same password.
B. Salt prevents users from reusing the same password.
C. Salt creates a different hash if two people use the same password.
D. Salt enforces the complexity rules for passwords.

Answer: C

Explanation:
A salt is a unique, random value stored alongside a password hash and combined with the password during hashing. Its main security benefit is that it ensures identical passwords do not produce identical hashes across different accounts or systems. If two users choose the same password, their stored hashes will differ because their salts differ, which directly prevents attackers from spotting shared passwords by comparing hashes. Salts also defeat precomputation attacks such as rainbow tables, because an attacker would need to regenerate tables for each possible salt value-a task that becomes infeasible when salts are large and unique per password. Salt does not enforce password complexity rules (that's a policy/validation function), does not guarantee users choose different passwords, and does not prevent password reuse across sites. The correct statement is that salt makes the resulting hash different even for the same password, improving resistance to offline cracking at scale and eliminating the "same hash = same password" shortcut attackers rely on.

NEW QUESTION # 92
(What is a key benefit of using a cryptography framework?)

A. It provides a structured approach to implementing encryption practices.
B. It removes the need for employee training in security.
C. It guarantees complete security against all attacks.
D. It is solely focused on regulatory compliance.

Answer: A

Explanation:
A cryptography framework provides a consistent, repeatable way to select, deploy, and manage cryptographic controls across an organization. Its key benefit is structure: it defines approved algorithms and key sizes, acceptable modes of operation, key management rules (generation, storage, rotation, revocation, backup), certificate handling, and secure protocol configurations (e.g., TLS settings). This reduces ad hoc implementations that often lead to vulnerabilities such as weak ciphers, key reuse, improper randomness, or missing integrity protections. A framework also clarifies roles and processes-who can access keys, how secrets are audited, and how exceptions are handled-improving governance and operational reliability.
Importantly, it does not guarantee perfect security; no framework can eliminate all risk, and secure outcomes still depend on correct implementation, monitoring, and maintenance. It also does not eliminate the need for training; human error is a major source of crypto misconfiguration. While frameworks help with compliance, they are not solely about regulation; they are about sound security engineering and lifecycle management.
Therefore, the primary benefit is providing a structured approach to implementing encryption practices.

NEW QUESTION # 93
(Two people want to communicate through secure email. The person creating the email wants to ensure only their friend can decrypt the email. Which key should the person creating the email use to encrypt the message?)

A. Recipient's private key
B. Sender's public key
C. Recipient's public key
D. Sender's private key

Answer: C

Explanation:
To ensure confidentiality so that only the intended recipient can decrypt an email, the sender must encrypt in a way that only the recipient can reverse. In public key cryptography, that means encrypting with the recipient's public key. The recipient is the only party who should possess the matching private key, so only they can decrypt the ciphertext. This pattern is fundamental to PKI-based secure email systems such as S/MIME and OpenPGP: the sender looks up or is provided the recipient's certificate
/public key, encrypts the message (often by encrypting a randomly generated symmetric session key with the recipient's public key), and the recipient uses their private key to recover the session key and decrypt the content. Encrypting with the sender's private key would not provide confidentiality; it resembles signing because anyone with the sender's public key could "decrypt" it. Encrypting with a private key of the recipient is also incorrect because private keys are not shared and should never leave the recipient's control. Therefore, the correct key to encrypt the message so only the friend can decrypt it is the recipient's public key.

NEW QUESTION # 94
(What is lattice-based cryptography?)

A. A technique for encoding messages using lattice points
B. A cryptographic scheme based on geometric lattices
C. A blockchain option from clone
D. A type of encryption algorithm using modular arithmetic

Answer: B

Explanation:
Lattice-based cryptography refers to cryptographic constructions whose security is based on the computational hardness of problems on mathematical lattices (regular grids of points in high-dimensional space). Examples of hard lattice problems include the Shortest Vector Problem (SVP) and Closest Vector Problem (CVP), and practical schemes often use related problems like Learning With Errors (LWE) or Ring- LWE. These problems are believed to remain hard even for quantum computers, making lattice-based cryptography a major candidate family for post-quantum cryptography. Lattice schemes can support encryption, digital signatures, and key exchange, often with strong security reductions (worst-case to average- case) and efficient implementations. The word "lattice" here is not about simple point encoding; it's about relying on geometric/algebraic structures and noise-based hardness assumptions. It is also unrelated to blockchain "options." While many lattice schemes do involve modular arithmetic internally, what defines the category is the underlying lattice hardness assumptions, not modular arithmetic alone. Therefore, the correct definition is a cryptographic scheme based on geometric lattices.

NEW QUESTION # 95
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