- A
A hash value published on the mirror site alone
Why wrong: A hash can detect tampering only if the hash itself is obtained from a trusted source. A compromised mirror could change both the file and the hash.
- B
A digital signature created with the vendor's private key
A digital signature provides authenticity and integrity. If the package was signed with the vendor's private key, anyone with the matching public certificate can verify that the package came from the vendor and has not been altered since signing. This works even if the download is mirrored or relayed by an untrusted CDN, because verification does not depend on trusting the transport path.
- C
Symmetric encryption of the package with a shared secret
Why wrong: Symmetric encryption protects confidentiality, but it does not by itself prove who created the package or whether it was modified.
- D
Key stretching with a slow password algorithm
Why wrong: Key stretching is used to make password guessing harder, not to verify software origin or file integrity.
SY0-701 General Security Concepts Practice Question
This SY0-701 practice question tests your understanding of general security concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A vendor distributes a Linux package through multiple mirrors. Security wants to verify that the package really came from the vendor and was not altered after publication, even if a mirror or CDN is compromised. Which cryptographic mechanism should be checked?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
A digital signature created with the vendor's private key
A digital signature created with the vendor's private key provides both authentication (proving the package came from the vendor) and integrity (detecting any alteration after signing). Even if a mirror or CDN is compromised, the signature verification will fail if the package has been tampered with, because only the vendor's corresponding public key can validate the signature. This is the standard mechanism used by package managers like APT (with signed Release files) and RPM (with GPG signatures).
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A hash value published on the mirror site alone
Why it's wrong here
A hash can detect tampering only if the hash itself is obtained from a trusted source. A compromised mirror could change both the file and the hash.
- ✓
A digital signature created with the vendor's private key
Why this is correct
A digital signature provides authenticity and integrity. If the package was signed with the vendor's private key, anyone with the matching public certificate can verify that the package came from the vendor and has not been altered since signing. This works even if the download is mirrored or relayed by an untrusted CDN, because verification does not depend on trusting the transport path.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Symmetric encryption of the package with a shared secret
Why it's wrong here
Symmetric encryption protects confidentiality, but it does not by itself prove who created the package or whether it was modified.
- ✗
Key stretching with a slow password algorithm
Why it's wrong here
Key stretching is used to make password guessing harder, not to verify software origin or file integrity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse a simple hash (which provides integrity only if the hash source is trusted) with a digital signature (which provides both integrity and authentication even when the distribution channel is untrusted).
Detailed technical explanation
How to think about this question
Digital signatures use asymmetric cryptography: the vendor signs a hash of the package with their private key (e.g., using RSA or ECDSA with SHA-256). The recipient verifies the signature using the vendor's public key, which is typically distributed via a trusted key server or embedded in the package manager's keyring. In practice, tools like `gpg --verify` or `apt-key` are used, and the signature is often stored in a detached `.asc` file or inline within the package metadata.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this SY0-701 question test?
General Security Concepts — This question tests General Security Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A digital signature created with the vendor's private key — A digital signature created with the vendor's private key provides both authentication (proving the package came from the vendor) and integrity (detecting any alteration after signing). Even if a mirror or CDN is compromised, the signature verification will fail if the package has been tampered with, because only the vendor's corresponding public key can validate the signature. This is the standard mechanism used by package managers like APT (with signed Release files) and RPM (with GPG signatures).
What should I do if I get this SY0-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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