数字签名加密算法的两座大厦先后倒塌—MD5和SHA-1这两种应用最为广泛的数字签名加密算法都被山东大学的王小云教授破解。-encrypted digital signature algorithm has two buildings collapsed - MD5 and SHA-1 that the two most widely used digital signature encryption algorithm has been the Shandong University Profe