Title: WGU Introduction-to-Cryptography German & Introduction-to-Cryptography Testi [Print This Page] Author: jimgray421 Time: yesterday 06:26 Title: WGU Introduction-to-Cryptography German & Introduction-to-Cryptography Testi Die Schwierigkeiten können den Charakter eines Menschen testen. Eine schlechte Situation kann die Aufrichtigkeit eines Menschen zeigen. Wenn man einer schlechten Situation gegen¨¹berstehen, können nur die mutigen es gant leichtnehmen. Sind Sie ein mutiger Mensch? Wenn Sie sich nicht so gut auf Ihre Pr¨¹fung vorbereiten, können Sie es noch leichtnehmen. Weil Sie die Fragenkataloge zur WGU Introduction-to-Cryptography Pr¨¹fung von DeutschPr¨¹fung haben. Und eine WGU Introduction-to-Cryptography Pr¨¹fung wird Sie nicht niederschlagen.
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Introduction-to-Cryptography Übungstest: WGU Introduction to Cryptography HNO1 & Introduction-to-Cryptography Braindumps Pr¨¹fungWenn Sie sich an der WGU Introduction-to-Cryptography Zertifizierungspr¨¹fung beteiligen, wählen Sie doch DeutschPr¨¹fung, was Erfolg bedeutet. Viel gl¨¹ck! WGU Introduction to Cryptography HNO1 Introduction-to-Cryptography Pr¨¹fungsfragen mit Lösungen (Q21-Q26):21. Frage
(Which wireless security standard uses an authentication server with 802.1X and EAP?)
A. WPA-Enterprise
B. WPA-PSK
C. TKIP
D. WEP
Antwort: A
Begr¨¹ndung:
802.1X is a port-based network access control framework that enables centralized authentication using an authentication server (commonly RADIUS). EAP (Extensible Authentication Protocol) runs within
802.1X to support many credential types (password-based methods like PEAP, certificate-based methods like EAP-TLS, and others). WPA-Enterprise is the wireless security mode that explicitly uses
802.1X + EAP with an authentication server to perform per-user/per-device authentication and to derive dynamic session keys. By contrast, WPA-PSK uses a pre-shared key without an external authentication server; all users share the same PSK, which is weaker for enterprise identity management. WEP is an older mechanism using static keys and does not provide modern 802.1X/EAP enterprise authentication in the WPA-Enterprise sense. TKIP is an encryption/integrity protocol used under WPA, not the full authentication "standard" involving an authentication server. Therefore, the correct choice is WPA-Enterprise.
22. Frage
(Why should a forensic investigator create a hash of a victim's hard drive and of the bitstream copy of the hard drive?)
A. To establish who created the files on the drives
B. To verify that the drives are identical
C. To certify the information on the drive is correct
D. To identify if someone opened the drive
Antwort: B
Begr¨¹ndung:
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.
23. Frage
(What describes a true random number generator?)
A. Slow and nondeterministic, and the same input produces different results
B. Unique integer determined through factorization of integers
C. Integer increased by one to match requests and responses
D. Fast and deterministic, and the same input produces the same results
Antwort: A
Begr¨¹ndung:
A true random number generator (TRNG) draws randomness from physical phenomena that are inherently unpredictable and not algorithmically reproducible. Because of this, it is nondeterministic:
you cannot feed it the same "input" and expect the same output stream. TRNGs are often slower than PRNGs because they depend on collecting entropy from hardware sources and may require conditioning to remove bias. This aligns with option B: slow and nondeterministic, producing different results even under similar or repeated conditions. Option A describes a deterministic PRNG, where identical seeds yield identical sequences. Option C is unrelated; factorization is a hard math problem used in cryptography (e.g., RSA security assumptions), not a randomness generator definition. Option D describes a counter, which is deterministic and not random. In secure systems, TRNG output may seed a cryptographically secure PRNG to provide both unpredictability and high throughput; but the defining characteristic of a TRNG is nondeterminism from physical entropy. Therefore, option B is correct.
24. Frage
(Which additional input element can be used to implement integrity in combination with symmetric ciphers?)
A. Hash function
B. Initialization vector
C. Nonce value
D. Encoding algorithm
Antwort: A
Begr¨¹ndung:
Symmetric encryption alone typically provides confidentiality, but it does not automatically provide integrity. Many encryption modes (especially older ones like CBC without authentication) are malleable, meaning an attacker may be able to modify ciphertext and cause predictable changes in plaintext after decryption. To add integrity, systems commonly combine symmetric encryption with a cryptographic hash-based integrity mechanism, such as a hash function used in an HMAC (Hash-based Message Authentication Code) or a dedicated authenticated-encryption mode like GCM that internally uses authentication tags. Among the given options, a hash function is the fundamental additional element that enables integrity checks: it allows construction of a MAC (e.g., HMAC-SHA-256) that the receiver verifies to detect any tampering. An initialization vector and a nonce value are used to ensure uniqueness and randomness properties for encryption but do not, by themselves, guarantee integrity.
An encoding algorithm changes representation, not security. Therefore, the correct additional input element for implementing integrity alongside symmetric encryption is a hash function, typically as part of an HMAC or similar MAC construction.
25. Frage
(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. Sender's private key
B. Sender's public key
C. Recipient's public key
D. Recipient's private key
Antwort: C
Begr¨¹ndung:
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.
26. Frage
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