The internet connectivity on older tech devices and smart gadgets could stop working on Thursday after a key digital certificate required to access websites safely expires. Let's Encrypt, a nonprofit organization that is the largest issuer of digital certificates — which encrypts and protects the connection between devices and websites on the internet — will be forced to expire one of its most popular digital certificates, the IdentTrust DST Root CA X3, on Sept. 30.... ...This problem has flown under the radar of many manufacturers, including Big Tech companies Apple, Google, Sony, and Microsoft — none of which have made...