STORAGE METHOD, DEVICE AND SYSTEM FOR CLOUD STORAGE DATA BASED ON ONE-TIME PAD (OTP)

摘要

A storage method, a device and a system for cloud storage data based on a One-Time Pad (OTP) are provided. They belong to the field of the cloud storage security technique. The method includes: generating and storing true random numbers with predetermined length and a random seed with predetermined length that is composed of the true random numbers according to a pre-set method. Data are collected from the random seed for multiple times, and are concatenated to a true random data string with the length not shorter than the length of the plain text. The true random key, which has the length not shorter than the length of the plain text, is generated according to the true random data string. The plain text is encrypted, and sent to a cloud storage data center. This solution can generate and store enough true random keys which are not reused, and occupy less storage space compared with the plain text; therefore protect the security and privacy of the cloud storage data efficiently, and improve the confidentiality level of the cloud storage data.