# Account WEMIX3.0 blockchain has External Owned Accounts (EOA) and Contact Accounts (CA). ## EOA EOA is simply a user account. A private key is generated through a wallet, and a public key is generated through a private key using the ECDSA algorithm. The EOA is authorized by the private key that the user has. ## CA CA is authorized by the contract code. Therefore, the CA does not have a private key. An electronic signature is required to generate a transaction and is signed with a private key. EOA has a private key, so it can generate transactions, but CA cannot create transactions on its own. The CA can only perform internal transactions at the request of another account. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.wemix.com/en/introduction/blockchain-basics/account.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.