input: [Explanation] Confirmation means that a transaction has been processed by the network and is highly unlikely to be reversed. Transactions receive a confirmation when they are included in a block and for each subsequent block. Even a single confirmation can be considered secure for low value transactions, although for larger amounts like 1000 US$, it makes sense to wait for 6 confirmations or more. Each confirmation exponentially decreases the risk of a reversed transaction. [Term] 
output: Confirmation
options: C o n f i r m a t i o n
options: C r y p t o g r a p h y
options: C i r c l e
options: C l i e n t
options: C o l o r e d c o i n s
options: C P U
options: C o i n b a s e
options: C o i n a g e
options: C r y p t o c u r r e n c y