최신업데이트된Introduction-to-Cryptography높은통과율시험공부인증시험자료

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WGU Introduction-to-Cryptography Exam Syllabus Topics:

SectionObjectives
Topic 1: Asymmetric Cryptography- Diffie-Hellman Key Exchange
- RSA Algorithm
- Public Key Infrastructure (PKI)
- Elliptic Curve Cryptography (ECC)
Topic 2: Cryptanalysis and Attacks- Brute Force and Dictionary Attacks
- Social Engineering Prevention
- Common Attack Vectors
Topic 3: Symmetric Cryptography- Key Management
- Stream Ciphers
- Initialization Vectors (IV)
- Block Ciphers (AES, DES, 3DES)
Topic 4: Cryptography Fundamentals- Cryptographic Terminology
- Symmetric vs Asymmetric Encryption
- History and Evolution of Cryptography
Topic 5: Hashing and Digital Signatures- Message Authentication Codes (MAC)
- Digital Signature Standards
- Hash Functions (MD5, SHA-1, SHA-256)
Topic 6: Applied Cryptography- SSL/TLS Protocols
- VPN Security
- Cryptographic Best Practices
- PGP and Email Encryption

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Introduction-to-Cryptography완벽한 시험공부자료 & Introduction-to-Cryptography완벽한 시험덤프

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최신 Courses and Certificates Introduction-to-Cryptography 무료샘플문제 (Q26-Q31):

질문 # 26
(Why should an asymmetric private key be used to encrypt the digest of an application?)

정답：A

설명：
Digital signing of software typically works by hashing the application (or its manifest) and then using the publisher's private key to create a digital signature over that digest. The private key is used because it is secret and uniquely controlled by the publisher; only the publisher should be able to produce a valid signature.
Verifiers (customers) use the publisher's public key to validate the signature and confirm that the digest matches the software they received. This yields two key properties: integrity (the software hasn't been altered; any modification changes the digest and breaks verification) and authenticity (the signature proves it came from the private-key holder). Option A incorrectly describes symmetric stream encryption. Option C incorrectly generalizes private-key behavior as "block encryption." Option D is wrong because verification uses the public key, not a private key; also, "encrypting with private key" in this context is better understood as signing, not confidentiality encryption. Therefore, the correct rationale is that the asymmetric private key is used to sign the file's digest so the corresponding public key can verify integrity and authenticity.


질문 # 27
(Which encryption algorithm encrypts with one key, decrypts with another key, and then encrypts with the first key?)

정답：D

설명：
3DES (Triple DES) commonly uses an Encrypt-Decrypt-Encrypt (EDE) sequence. In the two-key form, it encrypts with key K1, decrypts with key K2, then encrypts again with K1. In the three-key form, it encrypts with K1, decrypts with K2, then encrypts with K3. The EDE construction was chosen partly for backward compatibility: if K1=K2=K3, the scheme reduces to single DES, allowing older systems to interoperate in constrained ways. AES and IDEA do not use an EDE triple-stage process as their defining structure; they are single-pass block ciphers with internal rounds. DES is a single-pass algorithm (one key) rather than a triple application with multiple keys. Therefore, the algorithm described-encrypt with one key, decrypt with another, encrypt with the first-is 3DES. Although now considered legacy, it remains a classic example of increasing effective security by applying a block cipher multiple times with independent keys.


질문 # 28
(How can auditing enhance an organization ' s cryptographic practices?)

정답：D


질문 # 29
(What are the roles of keys when using digital signatures?)

정답：C


질문 # 30
(Which wireless security standard uses an authentication server with 802.1X and EAP?)

정답：B

설명：
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.


질문 # 31
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