171–175 of 175 posts
Is there anyone who doesn't get multiple robocalls every day?
It would be interesting to know what's different about the systems in the USA, as I don't imagine robocalling Britain would be somehow less profitable except by regulation or technical measures.
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What I don’t understand is why no major mobile carrier is offering a solution to this. It’s a pretty competitive market and this could be a big selling point. When the isp wars were going strong, before broadband put everyone under the thumb of monopolists and also before gmail, spam filtering was a serious competative advantage. Why can’t phone companies take an RBL like approach? If your VoIP service garners too ma…
Should be technically possible to have ”these numbers can originate from this operator”. I’ve learned that if a phone looks to be from my area code, it’s actually from China. No idea what the robocaller is saying. My operator should be able to have a short list of teleoperators in this zip code, and drop other calls.
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The question wasn't about why spoofing exists at all. It was about spoofing where they did not control the claimed number . If you want to place a call with spoofed caller ID info, your provider should require you to prove that the spoofed information is legitimate, not fraudulent. Otherwise, the telco should be obligated to strip the suspect caller ID information from the call so that the recipient can properly iden…
A cryptographic solution is absolutely necessary. Most reputable telcos already restrict spoofing or require tons of paperwork to prove you own the number before allowing you to use it as caller ID (like Twilio for example). The issue is that the PSTN is essentially a huge, worldwide message queue to which pretty much any telco can connect around the world, including shady ones - even if US law actually does fight sp…
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Blocking calls from certain VoIP services is almost certainly going to be a violation of common-carrier rules (which still apply to phone service no matter what happens with broadband). At a technical level, spam filtering relies heavily on analyzing email text. Doing similar analysis on voice calls is way harder. Also, there's UI issues. You can redirect suspected spam emails to a folder the user can inspect for fal…
What do you do with a call that hits the robocall filter? Send it straight to voicemail, where the user can inspect for false positives?