Content Security Distribution Scheme Based on Certificateless Public Key Cryptography

In recent years, large screens have been widely used in public areas with high traffic. With the traditional large screens are gradually connected to the Internet, the internet security threats have gradually penetrated into public large screen systems, such as data maliciously delivery, content maliciously tamper, and man-in-the-middle attacks. Aiming at the needs of secure distribution of electronic screen in public areas, this paper designs a certificateless mutual authentication scheme based on SM9 to solve the problem of legitimacy verification of communicating parties, and designs a hybrid encryption scheme to ensure secure content distribution. The scheme based on the certificateless public key cryptography system can ensure the authentication of both communicating parties, the confidentiality and integrity of data, and the non-repudiation of the content distributor during the content distribution of electronic screens in public areas, which also has good adaptability and flexibility.