VCash is a comprehensive result of Bitcoin features integrated with Mimblewimble technology. It inherits the allocation mechanism of Bitcoin and uses Grin's Mimblewimble implementation.VCash uses the MergedMining method to mine with Bitcoin, which means that VCash blocks can be calculated when calculating Bitcoin blocks. Generally speaking, POW chains need to consider a 51% risk of network attack. Due to the fact that Bitcoin has the world's largest number of miners and its widely distributed hash power, VCash can easily obtain most of Bitcoin's hash power with the support of Bitcoin mining pools. This means that VCash has the same security level as Bitcoin, making it equally difficult to attack 51% of it. The goal of VCash is to become the most private and secure chain for storing value....