Key providing method, video playing method, server and client

The invention discloses a key providing method, a video playing method, a server and a client, and the video playing method comprises the steps: sending a download request to the server, and receivingan index file of target video data fed back by the server; constructing an access request based on a specified character string in the index file, and sending the access request to the server so as to obtain a preset key pointed by the access request from the server; sending a file acquisition request containing a file address to the server so as to acquire encrypted fragmented data pointed by the file address of the fragmented data from the server; and decrypting the obtained encrypted fragmented data by using the preset key, and playing the decrypted fragmented data. According to the technical scheme provided by the invention, the copyright of the video data can be effectively protected. 本发明公开了一种密钥的提供、视频播放方法、服务器及客户端，其中，所述视频播放方法包括：向服务器发送下载请求，并接收所述服务器反馈的目标视频数据的索引文件；基于所述索引文件中的指定字符串构建访问请求，并向所述服务器发送所述访问请求，以从所述服务器中获取