Adaptive and dynamic mobile phone data encryption method

To enhance the security of user data in the clouds, we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded. Firstly, the adopted data encryption algorithm is not static and uniform. For each encryption, this algorithm is adaptively and dynamically selected from the algorithm set in the mobile phone encryption system. From the mobile phone´s character, the detail encryption algorithm selection strategy is confirmed based on the user´s mobile phone hardware information, personalization information and a pseudo-random number. Secondly, the data is rearranged with a randomly selected start position in the data before being encrypted. The start position´s randomness makes the mobile phone data encryption safer. Thirdly, the rearranged data is encrypted by the selected algorithm and generated key. Finally, the analysis shows this method possesses the higher security because the more dynamics and randomness are adaptively added into the encryption process.