Today AWS Elemental MediaConnect added integration with SPEKE for key exchange with conditional access system (CAS) partners. SPEKE, which stands for Secure Packager and Encoder Key Exchange, is an open API specification that streamlines the way CAS systems integrate with MediaConnect. Using this feature, you can now encrypt live video shared using entitlements and fully control permissions for content sent to your distribution partners. This enables you to build complex distribution workflows with more granular and sophisticated conditional rights management, including time-based access, black-outs, and many other rules-based requirements. Visit the documentation pages to learn more.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/aws-elemental-mediaconnect-now-supports-speke-for-conditional-access/