It's a technologically simple way to change the caller ID information encoded into an Internet call, allowing a caller to pretend to be someone they're not.

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And predictably the buzz on sports talk radio, television, and the internet has centered around those plucky Broncos from Boise, ID.

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In fact, it's capable of operating without an internet connection at all, since it relies on algorithmically generated keys, similar to a secure ID token.

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