Anonymous coins typically ensure privacy through the following techniques:

Ring Signature: Ring signature technology allows a sender to generate a signature from multiple possible candidates, making it impossible to identify the exact sender.
Zero-Knowledge Proof: Zero-knowledge proof allows one party to prove the truth of a statement without disclosing any specific information. For example, a user has sufficient funds to complete a transaction, but does not disclose the account balance or other details.
Mix Network: Through the encrypted transmission of multiple nodes and data mixing, the transaction path becomes more complex, increasing the difficulty of tracking.
Fungibility of Anonymous Coins: Anonymous coins are typically fungible, meaning each anonymous coin is identical to others and cannot be traced back to the original transaction.

Anonymous Coins