Security protection method and device, storage medium and computer program product

The invention discloses a security protection method and device, a storage medium and a computer program product. The method comprises the steps that if it is determined that storage space data of a current file is larger than or equal to a set storage space threshold value, an access control rule for conducting access control on the current file is generated, and access control is conducted on the current file based on the access control rule; if it is determined that the storage space data of the current file is smaller than a set storage space threshold value, a backup rule for backing up the current file is generated; and in response to the indication information, synchronizing the current file to the target file based on the backup rule, wherein the target file is a backup file of the current file, and the indication information represents that an attack behavior aiming at the current file exists. Therefore, the security protection cost is reduced while the security protection capability on the malicious