A bucket is a container for storing objects in COS. One bucket can store multiple objects. A bucket name is composed of a user-defined string and a system-generated numeric string linked by hyphens to ensure that the bucket is unique across all accounts in all of the cloud platform regions. For more information, see Bucket Overview.

Object

An object is the basic unit stored in COS. For more information, see Object Overview.

APPID

APPID is one of the identifiers for a cloud platform account and is associated with cloud resources. After you successfully sign up for a cloud platform account, you will be automatically assigned an APPID by the system. You can view your APPID at Account Info in the cloud console.

API Key

The API key is the security credential needed for authentication when you access the cloud platform APIs. It consists of SecretId and SecretKey. Multiple Cloud API keys can be created under one user account. If you do not have a Cloud API key, you need to create one in the Cloud API key console. Otherwise, you cannot call any Cloud APIs.

SecretId

As part of the Cloud API Key, SecretId is used to identify the API caller.

SecretKey

As part of the Cloud API Key, SecretKey is the key used to encrypt the signature string and verify the signature string on the server side.

Default Access Address

The default access address consists of the bucket name, COS region identifier, and object name. You can address the unique corresponding object in COS via the default access address. After you upload an object, the cloud platform will automatically create a default access address for the object.