A method includes receiving a certificate from a certificate authority computer, the certificate including a first digital signature associated with the certificate authority computer, the first digital signature being verifiable using a first public key associated with the certificate authority computer, the certificate including a second public key associated with the digital wallet provider computer. The method also includes generating a digital currency transfer message for providing digital currency to a user, the digital currency transfer message indicating an amount of digital currency and a third public key associated with the user. The method also includes generating a second digital signature for the digital currency transfer message using a second private key associated with the second public key; and transmitting the digital currency transfer message, the second digital signature, and the certificate to a user device associated with the user.