System and method for determining the location of persons

A method for providing anti-spoofing provisions for a sequence of messages sent to a mobile communication device, the method comprising:

• sending a first confirmation message to the mobile communication device over a communication means, the first confirmation message comprising a first authentication keyword;
• sending a second confirmation message to the mobile communication device over the communication means, the second confirmation message comprising a second authentication keyword and a third authentication keyword;
• and
• sending the third confirmation message to the mobile communication device over the communication means, the third confirmation message comprising a fourth authentication keyword,
• wherein the first authentication keyword matches the second authentication keyword, and
• wherein the third authentication keyword matches the fourth authentication keyword.

A system for providing anti-spoofing provisions for a sequence of messages sent to a mobile communication device, the system configured to:

• send a first confirmation message to the mobile communication device over a communication means, the first confirmation message comprising a first authentication keyword;
• send a second confirmation message to the mobile communication device over the communication means, the second confirmation message comprising a second authentication keyword and a third authentication keyword;
• and
• send the third confirmation message to the mobile communication device over the communication means, the third confirmation message comprising a fourth authentication keyword,
• wherein the first authentication keyword matches the second authentication keyword, and
• wherein the third authentication keyword matches the fourth authentication keyword.

A method for authenticating a message of a sequence of messages received by a mobile communication device, the method comprising:

• receiving, by the mobile communication device over a communication means, a first confirmation message, the first confirmation message comprising a first authentication keyword;
• receiving, by the mobile communication device over the communication means a second confirmation message, the second confirmation message comprising a second authentication keyword and a third authentication keyword;
• receiving, by the mobile communication device over the communication means, a third confirmation message, the third confirmation message comprising a fourth authentication keyword;
• and
• comparing the first authentication keyword to the second authentication keyword;
• in response to determining that the first authentication keyword matches the second authentication keyword, trusting the second confirmation message;
• and
• in response to determining that the third authentication keyword matches the fourth authentication keyword, trusting the third confirmation message.