Spam and robocalls are such a nuisance and a widespread problem ̵
SHAKEN / STIR is a two-pronged protocol with which. It also works with home phones running on Comcast's service. The end result is that Comcast, T-Mobile, and AT & T authenticate the caller ID with each other, so you are more sure that the person calling you is genuine.
To understand what SHAKEN and STIR are, you must first understand what they are trying to stop – spoofing caller IDs.
What is spoofing?
In most cases, spam and robocalls come from fake phone numbers. A fake number means that the caller has deliberately faked the caller ID information and displays a number he does not have. Scammers can use known phone numbers, eg. For example, relatives, a business, a government agency, or a local telephone number to give the impression that a call is legitimate.
Spoofing calls is important to spammers and cheaters because it's more likely to pick you up from a number that you believe is valid, and answering a spam call proves your number leads to a real person. The more you pick up, the more robocalls you'll likely receive.
What do the acronyms SHAKEN / STIR stand for?
You will appreciate the idea of catchy acronyms after you understand what they mean. SHAKEN stands for Signature-based Handling of Asserted Information Using Tokens. STIR is the abbreviation for Secure Telephone Identity Revisited. But the James Bond jokes are ripe for the genesis.
How SHAKEN / STIR Works
The short version of how SHAKEN / STIR works with independent service providers is as follows:
When you make a call using Service Provider A's service, the company checks and hangs up the call A digital signature indicating that it came from a valid caller ID. Service Provider B receives the call, verifies the signature, validates it again, and shows the recipient that the call has been verified – in fact, it comes from the number specified on the caller ID.
Of course it is far more complex. If you want to know more about technical details, TransNexus does a good job and guides you through various aspects of SHAKEN / STIR, such as: SIP identity headers, signatures, JSON web tokens, and the rest of the Nerdy details.
How do I know if a call has been confirmed?
A message is displayed on the screen of your phone when a caller is confirmed. T-Mobile users see "Caller Verified" directly below the phone number, as shown in the screenshot to the right.
Will I stop receiving robocalls?
Unfortunately not yet. SHAKEN / STIR does not block or stop unacknowledged calls on your phone, but can be used to identify those who make and receive spam calls. However, you have a better idea of which calls to answer if the caller ID text is "Caller Verified."
Also, Phone Companies Can Use Verification Technology to Create Robust Robocall Blocking Apps and Services Earlier than we see signs of it.
For example, Verizon Wirelessfor all post-paid Android customers, and has blocked Robocalls by default. Postpaid and iPhone customers need to download the Call Filter app to take advantage of the new feature.
Do I need an app or special software to use the protocol?
Call screening is currently only available on certain phones. Currently, T-Mobile and Metro customers will see the verified message with the following devices when running the latest device software:
Note: Apple's iPhone is currently not on this list.
AT & T has not yet announced on which devices a similarly verified message will be displayed.
When do Verizon and Sprint board?
If the FCC goes after the end of 2019. Verizon already uses the SHAKEN / STIR protocol for calls within its own network, but has not extended it to support external providers. Sprint has made no formal announcements, but according to a letter to the FCC in late 2018, the airline expects to begin testing in the second half of 2019.
The more airlines announce SHAKEN / STIR interoperability, the more we will do this Update this post with the latest information, including available devices.
Shortly before the implementation deadline required by the FCC, hopefully further agreements will be announced and phones will be added to the compatibility list. This makes it easier for you to know when to answer a random call or forward it to voicemail.
In the meantime, you should do everything possible to limit the number of robocalls received. Even if that means you have to spoof yourself a bit.
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