- A
A digital signature from the vendor
A digital signature lets the user verify both the source and the integrity of the update. If the signature is valid, the file was signed by the expected private key holder and has not been altered since signing.
- B
A longer filename with the vendor name in it
Why wrong: A filename can be changed easily and does not prove who created the file. It provides no cryptographic assurance.
- C
A larger file size than the previous update
Why wrong: File size does not prove identity or integrity. Attackers can create files of any size, so this is not a security validation method.
- D
A password protected ZIP file
Why wrong: Password protection may restrict access, but it does not prove the vendor created the file. It also does not verify that the contents were not modified.
Quick Answer
The answer is to check the vendor’s digital signature. A digital signature provides cryptographic proof of both authenticity and integrity: the vendor signs the file with their private key, and you verify that signature using the vendor’s public key. If the signature is valid, the file originated from the claimed vendor and was not altered in transit. On the Security+ SY0-701 exam, this concept tests your understanding of how to verify software update authenticity using asymmetric cryptography—a common scenario in the “Cryptography” domain. A frequent trap is confusing a hash (which only checks integrity) with a digital signature (which also confirms the source). Remember: a hash tells you if the file changed, but only a digital signature tells you who signed it. For a quick memory tip, think “signature = source + safety”—the vendor’s private key seals both identity and 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 user downloads a company software update and wants to verify it really came from the vendor and was not changed in transit. Which cryptographic feature should they check?
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 from the vendor
A digital signature from the vendor provides cryptographic proof of both authenticity (the file originated from the claimed vendor) and integrity (the file has not been altered in transit). The vendor signs the file with their private key, and the user verifies the signature using the vendor's public key; if the signature is valid, the file is genuine and unchanged.
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 digital signature from the vendor
Why this is correct
A digital signature lets the user verify both the source and the integrity of the update. If the signature is valid, the file was signed by the expected private key holder and has not been altered since signing.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A longer filename with the vendor name in it
Why it's wrong here
A filename can be changed easily and does not prove who created the file. It provides no cryptographic assurance.
- ✗
A larger file size than the previous update
Why it's wrong here
File size does not prove identity or integrity. Attackers can create files of any size, so this is not a security validation method.
- ✗
A password protected ZIP file
Why it's wrong here
Password protection may restrict access, but it does not prove the vendor created the file. It also does not verify that the contents were not modified.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse file properties (name, size) or simple access controls (password protection) with cryptographic verification, overlooking that only a digital signature provides non-repudiation and tamper evidence.
Detailed technical explanation
How to think about this question
Digital signatures typically use asymmetric cryptography (e.g., RSA or ECDSA) where the vendor's private key creates a hash of the file and encrypts it. The user's verification process involves decrypting the signature with the vendor's public key, recomputing the file hash, and comparing the two; a match confirms integrity and authenticity. In practice, this is often implemented via Authenticode for Windows executables or GPG signatures for Linux packages, and the public key must be obtained through a trusted channel (e.g., embedded in a certificate from a public CA).
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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 from the vendor — A digital signature from the vendor provides cryptographic proof of both authenticity (the file originated from the claimed vendor) and integrity (the file has not been altered in transit). The vendor signs the file with their private key, and the user verifies the signature using the vendor's public key; if the signature is valid, the file is genuine and unchanged.
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.
About these practice questions
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Last reviewed: Jun 11, 2026
This SY0-701 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SY0-701 exam.
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