Bitcoin and Libzerocoin-Zero Coin:
Libzerocoin is a privacy-focused development fork of Bitcoin. Libzerocoin was later used as the base for Zero Cash (now Z-Cash) and the Zero Coin protocol. Peepcoin is based on the Libzerocoin, with various features removed.
DASH and Masternodes:
Dash, based on Bitcoin, created a protocol called "Masternodes". These "Higher" nodes were an innovation that allowed multiple on-chain privacy features to be implemented on the Bitcoin protocol.
The DAPS Protocol, Total Obfuscation:
DAPS plans to continue this legacy of innovation by merging previous successful, stress-tested privacy methods. Masternodes, full obfuscation, and a Trustless governance is key to this mission. Many projects before have stopped short of full obfuscation due to the Trust issue, which we will attempt to address. The path of future privacy coins is in our Proof-Of-Audit feature combined with total obfuscation, allowing wholly-private blockchains while maintaining a standard of Trustless decentralized governance, started by Bitcoin.