The data encryption service DE7 can effectively help users manage data security on HUAWEI CLOUD. There are currently three application scenarios as follows, and the following three scenarios can be satisfied in turn. Which is the most recommended product order?
1. Storage service encryption: integrate with OBS, EVS, VBS, IMS and other services to directly create encrypted storage services
2. Application encryption: by calling the API, the upper layer application APP encryption is completed
3. Blast-proof host login: When logging in to the host, bring your own private key for authentication and replace the password login method