At Ubiq Security we focus on data security and making it easier for developers to incorporate encryption into their applications. As part of our work, we spend time on Slack, Stack Overflow, Reddit, etc. and we see several common mistakes that can cause security vulnerabilities that are easy to resolve. While we don’t think any developer wants to make an insecure product, it is easy to understand how developers not experienced in data security might not realize the impact of grabbing some sample code from the Internet and incorporating it into their application. I often say that writing programs incorporating encryption or data security is not like other software development. Just because an application runs, doesn’t mean you are done or that your application is secure.
Common Mistake 1: Inadvertently Reducing the Range of A Hashed Value
I have lost count of how many times I have seen someone use sha256 thinking they are creating a 256-bit value stored in 32 bytes when they are actually creating a 128-bit value stored in 32 bytes.
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