"Cisco's Talos research group found that TeslaCrypt 3.0.1 has improved its implementation of a cryptographic algorithm making it impossible now to decrypt files."
Jeremy Kirk in PCWorld on:
Victims can either either restore files from a backup or if that's not possible, pay up
+ "Fasten your seat belts now as we look into the gory details of the TeslaCrypt 3 cryptographic algorithm. "
Andrea Allievi and Holger Unterbrink in Talos on:
+ "It happened because those sites, like many, use third-party companies to display advertising."
Tom Simonite in MIT Technology Review on: