It Prevents senstive text from unauthorized access as it uses password protection. It can be used in every field i.e., in Military, which contains sensitive information or in large and small businesses, in hospitals etc. It is one of the most secure way of transferring and keeping sensitive information because it is not absolute medium for transferring. And it contains PIL module which scans whole image pixel-by-pixel.
Even after encryption,it wasn't as much secure so we decided to keep it password protected using getpass module which enables invisible password. Any intruder can't see and capture password via screen recording. And Finally regarding size of meassage is expanded by use of LSB(Least Significant Bit) i.e., it can store huge amount of text data encoded inside.
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