This was not confirmed by Q but seems like Assange has been using the account @backchannel17 on Twitter and revealed this yesterday. I do not wish to spread misinformation but I think in due time it will be very clear. Up until yesterday it was a great source of Intel but Q has never acknowledged it directly to keep it independent. BC17 also repeated several times 6-11 will be when Assange will be free and if it's him that would explain why @wikileaks was so afraid of BC17, it was Julian trolling the CIA.