Two common methods of video encryption digital rights management and encryption algorithms and application examples:

Digital rights management (DRM) encrypts the video.

Digital rights management refers to the use of digital rights management technology to encrypt and protect video content. This can be done by adding special cryptographic identifiers, licenses, or restricting access to video files.

The encryption algorithm encrypts the video.

Video content is encrypted using various encryption algorithms. Common encryption algorithms include symmetric encryption algorithms (such as AES) and asymmetric encryption algorithms (such as RSA). By encrypting video data, only users with the correct decryption key can decrypt and watch the video.

Example player code:

<div id="player"></div>
<script src="//player.polyv.net/script/player.js"></script>
<script>
var player = polyvPlayer({
    wrap: '#player',
    width: 800,
    height: 533,
    vid: '88083abbf5bcf1356e05d39666be527a_8',   
    playsafe:'81814fed-bdd0-4506-bec1-ebc8093148c5-hfevwsfxcsbcocx', 
  //playsafeUrl:'https://myDomain.com/token', // 业务方自定义的获取播放凭证接口URL，与playsafe参数二选一
    ts:'1568131545000',
    sign:'88313661ba7ded642c7b557b0a364b4b'
});

//切换加密视频时，需要重新获取播放凭证。如果初始化播放器时使用了playsafeUrl参数，则播放器会自动获取新的凭证，无需传playsafe参数。
player.changeVid({
  vid: '88083abbf5bcf1356e05d39666be527a_9', //需要切换的视频vid
  playsafe: '81814fed-bdd0-4506-bec1-ebc8093148c6-hfevwsfxcsbcocx', //新获取的playsafe token
  sign: '88313661ba7ded642c7b557b0a364b4c', //新获取的sign和ts参数
  ts: '1568131545001'
});
</script>

Obtain video playback certificate

/**
 * 获取点播加密视频的播放token
 */
@PostMapping("/getVodToken")
@ResponseBody
public ResponseVO getVodToken(@RequestBody GetTokenRequestVO tokenReq, HttpServletRequest request) throws IOException, NoSuchAlgorithmException {
    // 请求参数处理
    String videoId = tokenReq.getVideoId();
    String viewerId = tokenReq.getViewerId();
    if (StringUtils.isEmpty(videoId) || StringUtils.isEmpty(viewerId)) {
        return ResponseVO.failure("argument is error");
    }
    Map<String, Object> args = new HashMap<>(16);
    args.put("videoId", videoId);
    args.put("viewerId", viewerId);
    args.put("viewerIp", IPUtil.getIPAddress(request));
    args.put("viewerName", tokenReq.getViewerName());
    args.put("expires", tokenReq.getExpires());
    args.put("disposable", tokenReq.getDisposable());
    args.put("iswxa", tokenReq.getIswxa());
    args.put("userId", USER_ID);
    args.put("ts", System.currentTimeMillis());
    // 去除空值参数
    Map<String, String> params = args.entrySet()
            .stream()
            .filter(entry -> entry.getValue() != null)
            .collect(
                    Collectors.toMap(Map.Entry::getKey, entry -> String.valueOf(entry.getValue()))
            );
    // 请求参数签名
    params.put("sign", LiveSignUtil.getSign(params, SECRET_KEY));
    
    // 向保利威服务器请求Token
    TokenVO vo = RequestTokenService.requestTokenFromServer(params);
    if (vo == null || vo.getCode() == null || vo.getCode() != HttpStatus.OK.value()) {
        return ResponseVO.failure("请求数据失败");
    } else {
        // TODO 在返回Token前建议实现自己的加密逻辑，以免在网络传输过程中泄露Token
        return ResponseVO.success(vo.getData());
    }
}

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