The concept of making anonymous online transactions is in the spotlight because of the prominence of the digital currency Bitcoin, but most consumers remain uneasy with the cryptocurrency's instability and risk. An alternative for the privacy-minded might sprout from Tor, or The Onion Router.

The Tor system redirects Web traffic to conceal the end user's physical location and IP address. Tor was originally a U.S. Naval Research Laboratory-sponsored project and first became popular in the mid-2000s a way to protect "whistleblowers" and journalists in unsafe areas.

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