1. The offline verification code for Alibaba devices is a dynamic password.

2. The reason why the offline verification code for Alibaba devices uses a dynamic password is to increase the security of the account. A dynamic password is a one-time password generated by a mobile phone. A new password will be generated each time you log in. The validity period is very short, which can effectively prevent hackers from stealing passwords for illegal operations.

3. In addition to dynamic passwords, Alibaba also uses a variety of other security measures, such as SMS verification codes, fingerprint recognition, face recognition, etc., to improve the security of user accounts. When using Alibaba devices, users can choose the appropriate security verification method according to their needs to ensure the security of their accounts.