translation.en: They simply create accounts on ProtonMail, which is quite simple and takes a few moments, and all the key encryption and generation is happening automatically in the background as Bob is creating his account.
translation.zh: 首先在ProtonMail上注册账号， 非常简单快捷， Bob创建账号时， 所有的加密和密钥的生成 都自动在后台发生。