# How to hash the correct url to playback the vod MPEG-DASH file?
**URL:** https://community.wowza.com/t/how-to-hash-the-correct-url-to-playback-the-vod-mpeg-dash-file/44277
**Category:** Hire a Consultant
**Created:** [November 23, 2014, 10:31pm UTC](https://community.wowza.com/t/how-to-hash-the-correct-url-to-playback-the-vod-mpeg-dash-file/44277 "2014-11-23T22:31:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Tim\_Tsai](https://community.wowza.com/u/Tim_Tsai)
#### Post date: [November 23, 2014, 10:31pm UTC](https://community.wowza.com/t/how-to-hash-the-correct-url-to-playback-the-vod-mpeg-dash-file/44277/1 "2014-11-23T22:31:25Z")
I install a wowza server on server A, and I can playback the vod video on computer B.
But after I set the Outgoing Security.
I can’t playback any more, I have already read and try this article ([https://www.wowza.com/docs/how-to-protect-streaming-using-securetoken-in-wowza-streaming-engine](https://www.wowza.com/docs/how-to-protect-streaming-using-securetoken-in-wowza-streaming-engine)).
But it’s not working.
my setting:
SecureToken
Protect all protocols using hash (SecureToken version 2)
Shared Secret
adcd
Hash Algorithm
SHA-256
Use TEA for RTMP token security: false
Include client IP address in hash generation: false
Hash Query Parameter Prefix
wowzatoken
Client Restrictions
Not enabled
Place give me some help. Thanks!
---
### Author:  [@Tim\_Tsai](https://community.wowza.com/u/Tim_Tsai)
#### Post date: [November 24, 2014, 6:25pm UTC](https://community.wowza.com/t/how-to-hash-the-correct-url-to-playback-the-vod-mpeg-dash-file/44277/2 "2014-11-24T18:25:33Z")
I’m so junior.
Is there anyone can help me?
---
### Author:  [@Karel\_Boek](https://community.wowza.com/u/Karel_Boek)
#### Post date: [November 25, 2014, 9:37am UTC](https://community.wowza.com/t/how-to-hash-the-correct-url-to-playback-the-vod-mpeg-dash-file/44277/3 "2014-11-25T09:37:57Z")
There are numerous examples on the Net about how to hash a string with SHA256 in C#. You can eg. try this code (not tested though)
```auto
var password = "123456";
var application = "live";
var streamname = "myStream";
var text = application + "/" + streamname + "?" + password;
var bytes = System.Text.Encoding.UTF8.GetBytes(text);
var sha256 = new System.Security.Cryptography.SHA256Managed();
var hash = sha256.ComputeHash(bytes);
var token = Convert.ToBase64String(hash);
token = token.Replace('+', '-');
token = token.Replace('/', '_');
var url = "http://server:1935/" + application + "/" + streamname + "?wowzatokenhash=" + token;
```