✂
1. b _ _ _ _ c _ _ _ n (one word, 10 letters)
2. e _ _ c _ _ _ m (one word, 8 letters)
3. s _ _ _ _ _ t _ _ _ k (two words, 11 letters)
4. _ _ i _ a _ _ _ e _ (two words, 10 letters)
5. b _ _ _ _ _ n _ _ l _ (one word, 11 letters)
6. s _ _ k _ _ _ d (two words, 8 letters)
✂
1. blockchain
3. sybil attack
5. bitcointalk
6. silk road