- The Short Answer: What the Acronym Points To
- Decoding the Name: Code, Level, and Cybersecurity
- Who Issues It and Why That Matters
- What the Credential Actually Measures
- The Six Content Areas Behind the Label
- Why This Is Not the Other Certifications That Share Similar Letters
- How to Use the Name Correctly on a Resume or Profile
- Matching the Name to a Preparation Plan
- Frequently Asked Questions
- CHS-CY1 refers to the CodeHS Cybersecurity Level 1 certification exam, issued by CodeHS.
- The exam is 45 multiple-choice questions, timed at 90 minutes, with a 60% passing score.
- The content spans six areas, from Cybersecurity Essentials to Digital Safety and Data Security.
- There are no prerequisites, and each exam attempt requires a new voucher.
The Short Answer: What the Acronym Points To
On this site, CHS-CY1 is the shorthand for the CodeHS Cybersecurity Level 1 certification exam. It is an entry-level credential offered by CodeHS, an education platform known for computer science curricula in schools. If you have landed here wondering what the letters and the number actually mean, the breakdown is simple: the "CHS" part ties back to CodeHS, "CY" signals the cybersecurity track, and "1" indicates Level 1, the foundational rung of the CodeHS cybersecurity certification path.
That is the working interpretation used throughout this resource, and it is the one that matches the official CodeHS materials. CodeHS does not publish a dictionary-style expansion of the shorthand itself, so treat the letter-by-letter reading as a practical convention rather than an official acronym definition. What is official is the name of the exam: Cybersecurity Level 1 Certification, described on the CodeHS help center.
If you want a broader orientation before going deeper, the companion pages What Is CHS-CY1? and CHS-CY1 Meaning cover the same ground from slightly different angles, and CHS-CY1 Certification focuses on the credential itself.
Decoding the Name: Code, Level, and Cybersecurity
Breaking the label into its three parts makes it easy to remember and easy to explain to a parent, teacher, or hiring manager.
| Part of the label | What it signals | Why it matters to a candidate |
|---|---|---|
| CHS | Connects to CodeHS, the issuing organization | The exam is built around CodeHS-defined topics, not a third-party vendor blueprint |
| CY | The cybersecurity subject track | Content centers on security fundamentals, networking, cryptography, and safe computing |
| 1 | Level 1, the introductory level | No prerequisites are required, and the scope stays at foundational concepts |
The "Level 1" designation is the part candidates most often misread. It does not mean the exam is trivial, and it does not mean it covers everything in cybersecurity. It means the exam is scoped to the first tier of CodeHS's cybersecurity certifications. Topics belonging to Cybersecurity Level 2 are not part of this exam, which keeps your preparation focused. For a realistic sense of difficulty, see How Hard Is the CHS-CY1 Exam?
Who Issues It and Why That Matters
The issuer is CodeHS, and the exam is administered as an online timed exam. Official details live in two places: the Cybersecurity Level 1 Certification article and the Certifications FAQ on the CodeHS help center. Those are the sources to trust when rules or logistics seem unclear, because third-party summaries can lag behind updates.
A few mechanics come straight from CodeHS and are worth knowing early:
- No prerequisites. Anyone can sit for the exam without first completing another credential. See CHS-CY1 Requirements for the eligibility picture.
- Voucher-based attempts. A new voucher is required for each exam attempt, so a retake is not automatic or free-floating.
- Recommended preparation. CodeHS recommends its Fundamentals of Cybersecurity course as the preparation path.
- Credential lifespan. Certification credentials expire after 10 years.
Specific fee amounts and pass-rate statistics are not published in the official sources used for this site, so we do not quote any. If you are budgeting, the planning discussion in CHS-CY1 Certification Cost explains how to think about voucher-based pricing without guessing at numbers, and CHS-CY1 Pass Rate explains why no verified percentage is available.
What the Credential Actually Measures
Understanding the name is easier once you know what sits behind it. The CHS-CY1 exam consists of 45 multiple-choice questions delivered online. The CodeHS Certifications FAQ states the exam is timed at 90 minutes, and the passing score is 60% for all CodeHS certification exams except Java, which means CHS-CY1 uses that 60% threshold. Practically, that works out to needing 27 of 45 questions correct, a straightforward calculation from the published figures. The page CHS-CY1 Passing Score walks through what that threshold means in practice.
| Exam feature | CHS-CY1 detail |
|---|---|
| Issuer | CodeHS |
| Question type | Multiple choice |
| Number of questions | 45 |
| Time limit | 90 minutes |
| Passing score | 60% |
| Delivery | Online timed exam |
| Prerequisites | None |
| Retakes | New voucher required per attempt |
| Credential expiration | 10 years |
With 90 minutes for 45 questions, you have an average of two minutes per question. That is generous for recall-style items and tighter for scenario questions where you must reason about a network path, a cipher, or a SQL statement. Knowing the pacing in advance is part of treating the name "Level 1" with the right amount of respect.
The Six Content Areas Behind the Label
The official overview lists six topic headings under "Topics & Concepts Covered." CodeHS does not publish percentage weights for them, so no domain should be assumed to count more than another. Each area is summarized below; the full treatment is in CHS-CY1 Exam Domains: Complete Guide to All 6 Content Areas.
Domain 1: Cybersecurity Essentials
The foundation of the whole exam: the threats, principles, and ethics that frame everything else.
- Ransomware and phishing
- Internet of Things security concerns
- The CIA Triad (confidentiality, integrity, availability)
- Cyber ethics, credit and copyright
- Legal versus illegal hacking
Domain 2: Cryptography
How information is protected, and how weak protection is broken.
- Basic cryptography concepts
- Code breaking, brute force, and frequency analysis
- Caesar cipher and Vigenere cipher
Domain 3: System Administration
The everyday management of the machines and software that need protecting.
- Operating systems
- Software and software licenses
- Application security and browsers
- System administration and the command line
Domain 4: IT Concepts
The addressing and delivery rules that make the internet work.
- Internet addresses, IPv4 and IPv6
- DNS hierarchy
- Routing
- Packets and protocols
Domain 5: IT Infrastructure
The physical and logical building blocks of computing environments.
- Internal components and peripheral devices
- Network devices and network options
- Storage options
- Network communication and network management
Domain 6: Digital Safety and Data Security
Personal safety online plus the basics of protecting data in applications.
- Digital footprint, cyberbullying, and internet safety
- Clients and servers
- SQL queries and SQL injection
- Developer tools
Notice how the name "Cybersecurity Level 1" maps cleanly onto this list: it blends conceptual security (the CIA Triad, ethics), hands-on technical literacy (the command line, SQL, developer tools), and networking fundamentals (IPv4, DNS, packets). That breadth is exactly why a "Level 1" certification is useful as a first credential.
Why This Is Not the Other Certifications That Share Similar Letters
Short acronyms collide constantly in the certification world, and "CHS" followed by a code can resemble labels used by unrelated programs. On this site, CHS-CY1 means one thing only: the CodeHS Cybersecurity Level 1 exam. Its issuer is CodeHS, its format is 45 multiple-choice questions, its time limit is 90 minutes, and its passing score is 60%.
The same caution applies to career claims. Because CodeHS publishes no salary data for this credential, any specific earnings number attached to CHS-CY1 should be treated skeptically. For a measured discussion of what an entry-level credential can and cannot do for your income, read CHS-CY1 Salary Guide and CHS-CY1 Jobs.
How to Use the Name Correctly on a Resume or Profile
Because the acronym is not universally recognized, spell out the full title the first time you list it. A clear format looks like this: CodeHS Cybersecurity Level 1 Certification (CHS-CY1). After that, the short form is fine. This approach does three things: it tells a reader the issuer, it prevents confusion with unrelated credentials, and it signals that you understand the scope is introductory.
Who benefits most from listing it? The credential is aimed at beginners, which in practice includes students in cybersecurity or computer science courses, career-changers testing the waters, and anyone building a first line of verifiable proof that they understand the basics. It is a stepping stone, not a replacement for experience. Whether the effort pays off for your situation is a personal judgment, and Is the CHS-CY1 Certification Worth It? lays out the trade-offs honestly.
Key Takeaway
Write the full name, "CodeHS Cybersecurity Level 1 Certification," at first mention, then use CHS-CY1. Listing the issuer removes any ambiguity and keeps your claim accurate.
Matching the Name to a Preparation Plan
Since the six domains carry no published weights, a balanced plan is safer than gambling on a favorite topic. A sensible sequence follows the logic of the label itself: start with concepts, move to technical mechanics, then finish with applied safety and data topics. The timeline below is one reasonable ordering, not an official schedule.
Cybersecurity Essentials and Cryptography
- Memorize the CIA Triad and be able to match scenarios to each element
- Practice ransomware and phishing identification
- Work through Caesar and Vigenere ciphers by hand, plus brute force and frequency analysis
System Administration and IT Concepts
- Review operating systems, licenses, and basic command line use
- Study IPv4 versus IPv6, the DNS hierarchy, routing, and packets
IT Infrastructure and Digital Safety
- Sort hardware, storage, and network devices into clear categories
- Practice reading SQL queries and spotting SQL injection
- Take a full timed practice set and review every miss
Cryptography goes early because the cipher questions reward hands-on repetition more than rereading. Networking comes in week two because DNS, routing, and packets build on each other. The SQL and developer-tools material lands last so it can be checked against a timed full-length run. For a fuller method, the CHS-CY1 Study Guide goes deeper, the CHS-CY1 Cheat Sheet condenses must-know facts for a last-day review, and CHS-CY1 Training covers structured learning options. When you are ready to test yourself under realistic conditions, the CHS-CY1 practice tests mirror the 45-question multiple-choice format.
Scheduling questions come up often as well. If you are wondering about timing, CHS-CY1 Exam Dates explains how to think about availability, and for the very latest rules, the official CodeHS help center remains the final word. You can also keep practicing anytime on the main practice test site.
Frequently Asked Questions
On this site, CHS-CY1 refers to the CodeHS Cybersecurity Level 1 certification exam. "CHS" ties to CodeHS, "CY" to cybersecurity, and "1" to Level 1. CodeHS does not publish an official letter-by-letter expansion, so this is a practical reading of the shorthand.
CodeHS issues and administers it as an online timed exam. Official details are on the CodeHS help center, in the Cybersecurity Level 1 Certification article and the Certifications FAQ.
The exam has 45 multiple-choice questions, timed at 90 minutes, with a 60% passing score. That means answering at least 27 of the 45 questions correctly.
No. CodeHS states there are no prerequisites. It does recommend the Fundamentals of Cybersecurity course for preparation, and each exam attempt requires a new voucher.
CodeHS states that certification credentials expire after 10 years. Check the official help center for the most current policy before relying on that timeline.