While not exclusively about passwords, this paper discusses "residual data"—the hidden or accidental information left in file uploads (like TeX projects) that can lead to data leaks. Key Insight

It is used by security researchers, and sometimes malicious actors, to find publicly exposed text files that contain login credentials while excluding Gmail-related results from the search. Understanding the Query Components filetype:txt

Limit access to the .txt file to only those who absolutely need it. Use permissions and access controls provided by your operating system to restrict viewing and editing capabilities.

In today's digital age, it's not uncommon for individuals to store sensitive information in .txt files on their computers or mobile devices. This can include usernames and passwords for various online services, including email accounts like Gmail. However, it's crucial to handle such data with care to prevent unauthorized access.