Before you can do anything with digital signatures, you need to create a key pair, a public key and a private key.
在使用数字签名之前，我们需要创建一个密钥对，一个公钥和一个私钥。
2
To get an official digital certificate signed by a recognized certificate authority, you need to generate a public-private key pair and use the public key to create a certificate request.
要获得由权威认证机构签名的官方数字证书，需要生成一个公开-私有密匙对并使用公开密匙生成证书请求。
3
Sanyo has released the first pair of its Dual digital camcorders that support the iFrame video format with the VPC-HD2000A and VPC-FH1A.
三洋公司发布了两款支持iF rame的视频格式的数字摄像机VPC - HD 2000a和VPC - FH1A。