[author here] The lack of explanation naturally causes some misunderstanding, sorry for that. Let me clarify the main points: 1. Data is stored in only the im

[author here] The lack of explanation naturally causes some misunderstanding, sorry for that. Let me clarify the main points: 1. Data is stored in only the image, not backend server. Octomim is a proprietary solution that provides a REST API. One can use standalone applications like steghide, etc. 2. Using a backend server like Octomim is useful since it provides key management. The key used for steganography stored securely in the server and is not propagated to any where. Key of the steganography algorithm is crucial to prevent extraction without knowledge of it. This enables the user to extract hidden data from anywhere with the image and his authentication information only. 3. Storing env variables in an image can be considered as a complementary security measure for securely storing them. You can transfer them anywhere (store in github, etc.) but without access to backend server no one can read the hidden data. As a matter of fact, attackers even won't be aware of the existence of hidden data. 4. 'Visualenv' is just an application scenario of this scheme. It can be considered as a hacker tool or if you are willing to build a secure variable distribution system it can provide additional level of security by obscurity.