带有数字签名的邮件递送 Mail delivery with digital signature

一名妇女在家门口收到邮递员寄来的包裹，包裹上有数字签名，装在两人手中的一个封闭插座里。

Woman receives a package from the postman at the entrance of her house, with a digital signature, in a closed socket in the hands of both people.