Do computer programs ever contain hidden messages?

 It is highly unlikely that legitimate computer programs contain hidden messages. Computer programs are typically written by software developers who have a clear understanding of the code they are writing, and any malicious intent on their part would be highly unethical and potentially illegal.

However, it is important to note that malicious actors can intentionally insert hidden messages or malicious code into computer programs as part of a cyber attack. This is known as a "backdoor" and it allows an attacker to gain unauthorized access to a computer system or network. In these cases, the hidden message or code is intentionally inserted with the aim of subverting the security of the system.

To prevent such attacks, organizations can take a number of precautions, such as using trusted sources for software, regularly updating and patching software to fix security vulnerabilities, and conducting regular security audits and assessments to identify any potential security risks. Additionally, users should be vigilant about downloading software from untrusted sources and always verify the authenticity of any software they install on their computers or devices.