  We propose a scheme to preserve the anonymity of users in proof-of-asset
transactions. We assume bitcoin-like cryptocurrency systems in which a user
must prove the strength of its assets (i.e., solvency), prior conducting
further transactions. The traditional way of addressing such a problem is the
use of blind signatures, i.e., a kind of digital signature whose properties
satisfy the anonymity of the signer. Our work focuses on the use of a
designated verifier signature scheme that limits to only a single authorized
party (within a group of signature requesters) to verify the correctness of the
transaction.
