This article, from the Token Economy Institute, encompasses pretty much everything you need to know about the Landscape of Privacy Tokens.
Blockchain is a network allowing peer-2-peer transactions without authorities while keeping transaction counter-parties anonymous. Privacy is the ability of an individual or group to seclude themselves, or information about themselves, and thereby express themselves selectively. However, every transaction is broadcasted and viewable to all on a public ledger. Based on transaction pattern of certain wallet with known identity, the account owner can be profiled using social engineering. Just like in movie Ready One Player, “no one tells his real name in the Oasis!”
There have been a few privacy tokens using different technology to address privacy issues mentioned above, including Dash, Monera, Zcash. There have been a few others, including PIVX, Grin, Verge, NavCoin. Also, traditional tokens, such as LTC, contemplate adding privacy features to the token to gain some comparative advantage as key player for transaction and payment. This section will discuss each privacy token individually.
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