The Telecom Regulatory Authority of India (TRAI) is claiming a world first in using blockchain on a large scale in the telecoms sector. The application is set out in a draft regulation that aims to curb the problem of unsolicited communications, or spam, which TRAI first started to tackle in 2010 with a "do not disturb" registry, which has a lot of subscribers -TRAI says 230 million are registered.
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