___________ is a digital or virtual currency that uses cryptography for security,making it difficult to counterfeit.

A) ​Internet check
B) ​Electronic check
C) ​Virtual voucher
D) ​Cryptocurrency

Cryptocurrency

Digital or virtual currency that uses cryptography for security, operating independently of a central bank.

Cryptography

The practice and study of techniques for secure communication in the presence of third parties by converting information into a code to prevent unauthorized access.