How Open Source Software Stays Secure Even When the Code Is Public

A lot of people probably wonder how open-source software (OSS) can be secure when anyone, including hackers, can look at the code. This reddit discussion goes into some strong points, challenges, and real-life examples to explain why OSS can still be safe.

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How Does Sharing the Code Make Open Source Software Safer?

One big reason OSS is secure is because lots of people can check the code. When the code is open, security flaws are easier to find and fix. This is called the "many eyes" theory. It works because more people spotting mistakes means fewer bugs stay hidden.

For example:

  • The Heartbleed Bug in OpenSSL was a serious issue, but since the code was open, experts eventually caught it and patched it.
  • Another case is the XZ Backdoor Incident, where someone added bad code to a popular library. It was found by chance, but the open nature of the code meant the problem could be fixed fast.

What Are the Risks of Open Source Software?

Even though open-source software has many benefits, it’s not perfect:

  • Small Projects May Lack Reviewers: Many OSS projects are run by just one or two people. This means not all code gets properly checked.
  • Hackers Can Join the Community: Sometimes, bad actors pretend to be helpful and sneak in harmful code.
  • Blind Trust in Other Libraries: OSS often uses bits of code from other open-source projects. If those projects aren’t secure, it can cause problems.

Open Source & Closed Source Software Comparison

Closed-source software, like proprietary programs, keeps its code hidden. This can make it harder for hackers to find bugs, but it also means fewer people can help fix issues. For example, if a closed-source app has a big problem, only the company can fix it—and sometimes, they take years.

With OSS, anyone can find and fix vulnerabilities, which often leads to faster improvements.

Is Security Just About Open or Closed Code?

It’s not just about whether the code is public or private. Security depends on things like frequent updates, thorough reviews, and how active the team or community is. Both open-source and closed-source software need strong practices to stay safe.

How are open source software secure?

Final Thoughts: Open Source Can Be Secure, But It's Not Magic

Open-source software has its risks, but being open helps a lot. When everyone can see the code, it’s easier to catch and fix mistakes. Still, it works best when there are enough people checking and maintaining the project. Security takes effort, no matter how the code is shared.

Read also: 

Why Software Needs Maintenance and What That Actually Means

Why Some Software Requires Installation and Others Run Directly

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