How do Blockchain developers ensure the privacy of transactions?

For privacy, Blockchain Developers implement techniques such as Zero-Knowledge Proofs, by which a prover can prove a statement to the verifier without leaking any information other than the veracity. They could also go to Ring Signatures—whereby one is among a group of potential signers to obscure the actual signer’s identity—or to Blockchains developed with privacy in mind, like Monero, whose enhanced cryptographic techniques render transactions untraceable.