There's heartening news for our location privacy out of Massachusetts this week. The Supreme Judicial Court, the state's highest court, ruled that police access to real-time cell phone location data—whether it comes from a phone company or from technology like a cell site simulator—intrudes on a person’s reasonable expectation...

Do you use Verizon, AT&T, Sprint, or T-Mobile? If so, your real-time cell phone location data may have been shared with law enforcement without your knowledge or consent. How could this happen? Well, a company that provides phone services to jails and prisons has been collecting location information on...