What kind of information should never be shared in unencrypted emails?

Sharing sensitive information such as Social Security numbers in unencrypted emails poses significant security risks. This type of data is particularly vulnerable to interception during transmission, and if exposed, it can lead to identity theft and other forms of fraud. Since Social Security numbers are often used as a key identifier for individuals in various systems, protecting this information is crucial for maintaining privacy and compliance with regulations such as HIPAA.

In contrast, other options involve information that, while it may be relevant within a specific context, does not carry the same level of sensitivity. For example, non-sensitive personal anecdotes, general project updates, and publicly available data do not pose a substantial risk to an individual's privacy and can be communicated without the same level of concern for encryption. Thus, it is essential to prioritize the protection of highly sensitive data like Social Security numbers in all forms of communication.