APPID
The APPID is one of the account identifiers for a cloud platform account and is used for associating cloud resources. After you successfully sign up for a cloud platform account, you will be automatically assigned an APPID by the system. Multiple projects can be created under one APPID. You can view the APPID via the Account Center console.
Bucket
A bucket is used for storing objects in COS. Multiple objects can be stored in one bucket.
Object
An object is the basic unit stored in COS.
SecretId
SecretId and SecretKey, collectively called the Cloud API key, are the security credentials needed for authentication when you access the cloud platform APIs. SecretId is used to identify the API caller. Multiple Cloud API keys can be created under one APPID. If you do not have a Cloud API key, you need to create one at Cloud Access Management > Cloud API Key. Otherwise, you cannot call any Cloud APIs.
SecretKey
SecretId and SecretKey, collectively called the Cloud API key, are the security credentials needed for authentication when you access the cloud platform APIs. SecretKey is the key used for signature string encryption and server-side signature string verification. Multiple Cloud API keys can be created under one APPID. If you do not have a Cloud API key, you need to create one at Cloud Access Management > Cloud API Key. Otherwise, you cannot call any Cloud APIs.
Project
A project is a virtual concept where users can establish multiple projects under one account, each managing different resources.