The growth in the use of Secure Sockets Layer/Transport Layer Security (SSL/TLS) encryption has turned out to be a distinctly double edge sword for enterprises. The same encryption is also allowing cyber criminals and threat actors of all types to slip past enterprise defenses with alarming ease. In the fourth quarter of 2015 nearly 65 percent of all web connections that Dell observed were encrypted, leading to a lot more under-the-radar attacks, according to the company. The lack of centralized control and visibility over the whole process has allowed criminals to misuse unprotected keys and certificates to hide malware in encrypted traffic.”]
Source: https://www.darkreading.com/attacks-breaches/when-encryption-becomes-the-enemy-s-best-friend