On 21 May, The annual Athecrypt event was successfully held. This year the main focus was on the foundations of blockchain and distributed ledgers. Leveraging the presence of our distinguished professors in the field from other parts of the world (mainly due to our Mega-ace summer school), professors Juan Garay, Vassilis Zikas, Oshani Senevirathne and Aggelos Kiyayas, our students had the chance to spend a valuable time at the talks and a great chance to socialize with each other and our respected visiting researchers and professors.