Hi, I am in a similar issue. Started a thread as well http://forum.xda-developers.com/htc-...-boot-t3335383
But in my case , bootloader is locked, S-ON, and there is no custom recovery as TWRP etc. I have been trying all the options and it always boots up to that encryption message. Please give me some ideas... Thanks.
However, if you are trying to break the encryption leaving the data intact, then that is not allowed for obvious reasons (one of which is that one could break into someone else's phone without permission).
If you have any questions or concerns about the policy, please feel free to send me a PM and we'll discuss it further.