For customers who want to protect their content, Adobe said the open RTMP specification won’t include its secure RTMP measures, nor will the license that accompanies the specification allow developers to circumvent such measures.
However, developers will be free to use their own technological measures to secure content. The RTMP specification does not provide any requirement or restrictions on a developer’s own measures to secure content.
The spec should be posted at www.adobe.com/devnet/rtmp sometime this half.