The NSA (National Security Agency) has put together 25 of the world's most dangerous coding mistakes.
The list, which appears not to be understood by a number of programmers, highlights the errors which can lead to vulnerabilities in a computer code.
Just two of them, according to the SANS Institute, led to over 1.5m web site security breaches during 2008.
"This list is primarily for people who have first responsibility for designing a system. Veteran programmers have probably learnt the hard way whereas a brand new programmer will be making more basic errors.", said Patrick Lincoln, director of the Computer Science Laboratory at SRI International.
"The real dedicated serial attacker will probably find a way in even if all these errors were removed. But a high school hacker with malicious intent - ankle-biters if you will - would be deterred from breaking in," he said.
The list in full, (hands up if you know what half of these mean):
CWE-20:Improper Input Validation
CWE-116:Improper Encoding or Escaping of Output
CWE-89:Failure to Preserve SQL Query Structure
CWE-79:Failure to Preserve Web Page Structure
CWE-78:Failure to Preserve OS Command Structure
CWE-319:Cleartext Transmission of Sensitive Information
CWE-352:Cross-Site Request Forgery
CWE-209:Error Message Information Leak
CWE-119:Failure to Constrain Operations within the Bounds of a Memory Buffer
CWE-642:External Control of Critical State Data
CWE-73:External Control of File Name or Path
CWE-426:Untrusted Search Path
CWE-94:Failure to Control Generation of Code
CWE-494:Download of Code Without Integrity Check
CWE-404:Improper Resource Shutdown or Release
CWE-285:Improper Access Control
CWE-327:Use of a Broken or Risky Cryptographic Algorithm
CWE-732:Insecure Permission Assignment for Critical Resource
CWE-330:Use of Insufficiently Random Values
CWE-250:Execution with Unnecessary Privileges
CWE-602:Client-Side Enforcement of Server-Side Security
So, next time you want to have a pop at Steam, PSN or X-Box Live, have a thought about how many error numbers they've already had to sift through.