The sender encrypts the message digest under her private key .

发送方用自己的私钥加密消息摘要。

Dubbed x-pire , it encrypts photos with a key that can only be used before a certain date .

这一绰号叫做“x-pire”的软件用密码加密照片，而这一密码只能在特定的日期前使用。

Alice then encrypts the message digest with her private key to create her personal signature .

然后，小红用她的私钥加密该消息摘要以创建她的个人签名。

Encrypts a file so that only the account used to encrypt the file can decrypt it .

将某个文件加密，使得只有加密该文件的帐户才能将其解密。

Once installed and given a strong password of its own , plus an e-mail address , lastpass encrypts all the logons and passwords stored on your computer .

一旦安装获得强大密码后，每加上一个ane-mail地址，lastpass就会对所有的登录和密码重新加密存到你的电脑里。