Method and device for improving data storage security

An electronic device, comprising:

• a processor and a memory;
• the memory is configured for storing a computer program;
• the processor is configured for executing the program stored on the memory to perform operations of:
• detecting access counts of user data sets in a cloud storage resource pool, where the user data sets in the cloud storage resource pool are obtained by data encoding with an erasure coding algorithm of a first security level;
• determining a first user data set whose access count in the cloud storage resource pool meets a preset condition;
• obtaining a second security level according to attribute information of the cloud storage resource pool, wherein the attribute information includes the first security level and an increment for security step, and the second security level has a security step greater than that of the first security level;
• and
• re-encoding the first user data set with an erasure coding algorithm of the second security level to obtain re-encoded first user data sets;
• wherein for a first security level of N+M and an increment for security step of i, determining the second security level as N+(M+i), wherein, N is the number of nodes for a user data set in the cloud storage resource pool, and M and M+i are maximum numbers of abnormal nodes in the nodes for the user data set in the cloud storage resource pool when the user data set can be read, wherein M, N, and i are integers greater than 0, and M+i is less than or equal to N.