# Media Authentication Management

 - [POST /media/kollus-encrypt](https://kollus-api.redocly.app/en/products/vod/openapi/%EB%AF%B8%EB%94%94%EC%96%B4-%EC%9D%B8%EC%A6%9D-%EA%B4%80%EB%A6%AC/encryptmediadata.md): Encrypts a plaintext string using Kollus service's internal encryption algorithm for secure communication between the player and the server.
 - [POST /media/user-key](https://kollus-api.redocly.app/en/products/vod/openapi/%EB%AF%B8%EB%94%94%EC%96%B4-%EC%9D%B8%EC%A6%9D-%EA%B4%80%EB%A6%AC/createmediauserkey.md): Creates a user key to be used for user identification and security authentication.
 - [PUT /media/user-key/{user_key}](https://kollus-api.redocly.app/en/products/vod/openapi/%EB%AF%B8%EB%94%94%EC%96%B4-%EC%9D%B8%EC%A6%9D-%EA%B4%80%EB%A6%AC/renewmediauserkey.md): Invalidates the existing user key and reissues a new key when the validity period has expired or for security reasons.
 - [DELETE /media/user-key/{user_key}](https://kollus-api.redocly.app/en/products/vod/openapi/%EB%AF%B8%EB%94%94%EC%96%B4-%EC%9D%B8%EC%A6%9D-%EA%B4%80%EB%A6%AC/deletemediauserkey.md): Immediately invalidates the user key and permanently deletes it from the system.
 - [GET /media/watermarking-code](https://kollus-api.redocly.app/en/products/vod/openapi/%EB%AF%B8%EB%94%94%EC%96%B4-%EC%9D%B8%EC%A6%9D-%EA%B4%80%EB%A6%AC/getmediawatermarkingcode.md): Retrieves the watermarking code to be displayed as text on the player screen for illegal leak prevention.