Did You Send This - for module phone SMS/Voice

This article is a comprehensive 2025 update to the original 2006 post: “ Did you send this - another weapon against spam? ” Applying DYST to Mobile Communication The original DYST idea could theoretically be adapted by Google and Apple, who could implement it unilaterally for mobile calls and messages. Rather than relying on telecommunication carriers, they could use their existing TCP/IP…