摘要：
http://blogs.yaclife.com/（现在访问不了）https://github.com/bennyhee/CryptoDemohttps://developer.apple.com/iphone/library/documentation/Security/Reference/certifkeytrustservices/Reference/reference.htmlhttp://developer.apple.com/library/mac/#documentation/Security/Conceptual/SecTransformPG/SigningandVerifyi 阅读全文
