Android apk签名
首先需要了解一个概念是android apk签名.
Android requires that all apps be digitally signed with a certificate before they can be installed. Android uses this certificate to identify the author of an app, and the certificate does not need to be signed by a certificate authority. Android apps often use self-signed certificates. The app developer holds the certificate's private key.
android需要所有的apps在安装之前都有一个拥有数字签名的证书。Android通过这个证书来识别一个app的作者以及证书不需要被拥有证书的作者签名。Android apps通常使用自签名的证书。而app的开发者们拥有证书的私钥。
以上来说二点:
* 签名是用于确认作者信息
* 签名不需要认证的作者（自己可以随便打）
明白了Android apk签名之后，对于微信开放平台所需签名就是这个签名.