# Multicast input with BISS encryption

**URL:** <https://community.wowza.com/t/multicast-input-with-biss-encryption/37308>\
**Category:** Wowza Streaming Engine\
**Created:** [September 26, 2014, 10:19am UTC](https://community.wowza.com/t/multicast-input-with-biss-encryption/37308 "2014-09-26T10:19:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lionel\_Gattegno1](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@Lionel\_Gattegno1](https://community.wowza.com/u/Lionel_Gattegno1)\
**Post date:** [September 26, 2014, 10:19am UTC](https://community.wowza.com/t/multicast-input-with-biss-encryption/37308/1 "2014-09-26T10:19:47Z")

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Hi,

I’m transcoding a multicast stream with success, one of theses streams is protected with BISS.

Is there a way for Wowza to decrypt the stream before transcoding it?

Here is the command I use with VLC to decrypt it:

```auto
vlc udp://@239.12.20.33:7400 -vvv --ts-csa-ck=XXXXXXXXXX

```

Thanks

Larc

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**Author:** ![Andrew\_Kennedy1](https://avatars.discourse-cdn.com/v4/letter/a/278dde/32.png) [@Andrew\_Kennedy1](https://community.wowza.com/u/Andrew_Kennedy1)\
**Post date:** [September 28, 2014, 4:32am UTC](https://community.wowza.com/t/multicast-input-with-biss-encryption/37308/2 "2014-09-28T04:32:31Z")

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Hi,

This is not currently possible with Wowza, so you will need to decrypt it before Wowza can take in the stream,

Andrew