Payment processor Worldpay failed to migrate some of its SSL/TLS servers to SHA-2 certificates. The company missed the deadline to get new certificates for those servers before Dec. 31, 2015. The CA/Browser Forum decided that new SHA-1-signed certificates should not be issued after Jan. 1, 2016. Mozilla agreed to allow Symantec to issue the requested certificates to Worldpay, but under certain conditions like limiting their lifespan to 90 days and publishing them in Certificate Transparency logs. If it gets the go-ahead, other companies might come asking for additional exemptions.”]