# Change HLS header EXT-X-KEY from chunklist to playlist

**URL:** <https://community.wowza.com/t/change-hls-header-ext-x-key-from-chunklist-to-playlist/50271>\
**Category:** Wowza Streaming Engine\
**Created:** [December 1, 2017, 12:15pm UTC](https://community.wowza.com/t/change-hls-header-ext-x-key-from-chunklist-to-playlist/50271 "2017-12-01T12:15:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Carlos\_Amaral](https://avatars.discourse-cdn.com/v4/letter/c/5fc32e/32.png) [@Carlos\_Amaral](https://community.wowza.com/u/Carlos_Amaral)\
**Post date:** [December 1, 2017, 12:15pm UTC](https://community.wowza.com/t/change-hls-header-ext-x-key-from-chunklist-to-playlist/50271/1 "2017-12-01T12:15:25Z")

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In my structure I’ve to authenticate the stream, and I need do it once. Because this I can’t go in my back-end and validate for every chunklist (live stream), so I want put the decrypt key on playlist and authenticate it. I’m using CloudFront, so session is not an option. Another option is put the decryption key in my back-end, but I don’t know how do this.