A new steganography protocol for improving security of cloud storage services

In recent years, cloud computing services have become a must in our daily lives. Although well-known security technologies are used for system protection and data protection, the security of existing service systems is far from enough. The main problem is that existing systems and/or programs usually have some unknown issues or vulnerabilities, and can be attacked by some unauthorized persons in some unexpected ways. To solve the problem, at least partially, we have proposed a new steganography protocol for improving information security in cloud storage services. The key point in this protocol is to synthesize an image that can be used as the encryption/decryption key, the stego-key, as well as the cover data. Initial analysis shows that the new protocol is very secure. This paper formulates the protocol in a more formal way, so that based on the formulation, we can find possible weak points more easily, and make the protocol more practically useful.