Introduction-to-Cryptography Certification Exam Dumps, Valid Braindumps Introduction-to-Cryptography Pdf

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WGU Introduction-to-Cryptography Exam Syllabus Topics:

SectionObjectives
Hashing and Digital Signatures- Message Authentication Codes (MAC)
- Digital Signature Standards
- Hash Functions (MD5, SHA-1, SHA-256)
Asymmetric Cryptography- Public Key Infrastructure (PKI)
- Diffie-Hellman Key Exchange
- Elliptic Curve Cryptography (ECC)
- RSA Algorithm
Cryptography Fundamentals- Symmetric vs Asymmetric Encryption
- Cryptographic Terminology
- History and Evolution of Cryptography
Cryptanalysis and Attacks- Common Attack Vectors
- Social Engineering Prevention
- Brute Force and Dictionary Attacks
Applied Cryptography- Cryptographic Best Practices
- SSL/TLS Protocols
- PGP and Email Encryption
- VPN Security
Symmetric Cryptography- Initialization Vectors (IV)
- Stream Ciphers
- Block Ciphers (AES, DES, 3DES)
- Key Management

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WGU Introduction to Cryptography HNO1 Sample Questions (Q48-Q53):

NEW QUESTION # 48
(Why should a forensic investigator create a hash of a victim's hard drive and of the bitstream copy of the hard drive?)

Answer: B

Explanation:
In digital forensics, investigators must preserve evidence integrity and demonstrate an unbroken chain of custody. Creating a cryptographic hash (such as SHA-256) of the original drive and then hashing the forensic bitstream image provides a strong mathematical assurance that the copy is an exact, bit-for-bit replica. Because secure hash functions are designed so that any tiny change in data produces a dramatically different digest, matching hashes indicate the image contains identical data to the source at the time of acquisition. This is critical in legal and investigative contexts: analysis is performed on the copy, not the original, to avoid altering evidence. If the hashes match, the investigator can testify that the evidence examined is identical to what was collected, supporting admissibility and credibility.
Hashing does not prove who created files, nor does it directly show whether someone "opened the drive"; it specifically validates the integrity and equivalence of the captured image. Therefore, hashing both artifacts is done to verify that the original and the bitstream copy are identical.


NEW QUESTION # 49
(Why should a forensic investigator create a hash of a victim's hard drive and of the bitstream copy of the hard drive?)

Answer: B

Explanation:
In digital forensics, investigators must preserve evidence integrity and demonstrate an unbroken chain of custody. Creating a cryptographic hash (such as SHA-256) of the original drive and then hashing the forensic bitstream image provides a strong mathematical assurance that the copy is an exact, bit-for-bit replica.
Because secure hash functions are designed so that any tiny change in data produces a dramatically different digest, matching hashes indicate the image contains identical data to the source at the time of acquisition. This is critical in legal and investigative contexts: analysis is performed on the copy, not the original, to avoid altering evidence. If the hashes match, the investigator can testify that the evidence examined is identical to what was collected, supporting admissibility and credibility. Hashing does not prove who created files, nor does it directly show whether someone "opened the drive"; it specifically validates the integrity and equivalence of the captured image. Therefore, hashing both artifacts is done to verify that the original and the bitstream copy are identical.


NEW QUESTION # 50
(Which is a primary reason for ethical concerns about encryption?)

Answer: D

Explanation:
Ethical concerns about encryption commonly arise from the tension between individual privacy/security and societal needs such as law enforcement, national security, and public safety. Strong end-to-end encryption can prevent unauthorized parties from accessing data, including criminals and foreign adversaries, but it can also limit legitimate government access to communications and evidence-even with warrants-because providers may not possess the keys needed to decrypt. This has fueled debates around "going dark," lawful access, and proposals for exceptional access mechanisms or backdoors. Critics argue that weakening encryption for access would create systemic risk, since any intentional vulnerability can be exploited by malicious actors, while proponents emphasize investigative needs in serious cases. Regardless of the stance, the primary ethical concern reflected in policy debates is that encryption complicates government access to information that may be crucial for preventing or investigating crime. The other options do not capture the main ethical controversy: encryption is widely beneficial beyond corporations, and it is not primarily about speed or storage reduction. Therefore, the correct answer is B.


NEW QUESTION # 51
(What is the maximum key size (in bits) supported by AES?)

Answer: C

Explanation:
AES supports three standardized key sizes: 128, 192, and 256 bits, with a fixed block size of 128 bits.
The maximum of these supported key sizes is 256 bits (AES-256). Key size affects resistance to brute- force key search: larger keys exponentially increase the search space. In practice, AES-128 is already considered strong against brute force with contemporary computing capabilities, while AES-256 is often chosen for compliance requirements, conservative security margins, or to hedge against future advances. AES-512 is not part of the AES standard; if 512-bit keys are desired, systems typically use different constructions (like using AES-256 in certain key-derivation or wrapping schemes) rather than changing AES itself. Therefore, the correct maximum supported AES key size is 256 bits.


NEW QUESTION # 52
(What describes how Counter (CTR) mode encryption functions?)

Answer: C

Explanation:
CTR mode turns a block cipher (like AES) into a stream-like construction by generating a keystream from successive encryptions of a changing input block. Specifically, CTR forms input blocks using a nonce (unique per message) combined with an increasing counter. Each nonce||counter block is encrypted with the block cipher under the shared key, producing a pseudorandom output block. That output is then XORed with plaintext to yield ciphertext (and XORed with ciphertext to recover plaintext). This design enables parallelization (blocks can be generated independently), efficient random access decryption, and avoids chaining dependencies seen in modes like CBC. Option B describes CFB-like behavior; option C describes ECB; option D describes CBC. CTR's security critically depends on never reusing the same nonce/counter sequence with the same key, because reuse would repeat keystream blocks and expose plaintext relationships. Therefore, the correct description is that CTR converts the block cipher into a stream cipher using a counter value and a nonce.


NEW QUESTION # 53
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