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“NSA-proof” email service ProtonMail made 50 of its lifetime accounts available over Black Friday and Cyber Monday, as interest in online security heightens, VentureBeat reports.

ProtonMail offers a tiered service, with free basic features and paid additional services.

Valued at 1,337 euro (USD $1,400), lifetime accounts give users unfettered access to the service as well as access to any future additions. The Switzerland-based service recently noted that its weekly signups doubled, according to The Verge.

Encrypted apps and services have gained a great deal of public attention and adoption over the course of 2016. Starting with the FBI’s battle with Apple over iPhone encryption, they gained even more attention during the election after Russian hackers targeted the Clinton campaign and Democratic National Committee.

Clinton campaign staffers reportedly starting using encrypted chat app Signal to message each other after Russian hackers compromised the emails of John Podesta, Clinton’s campaign manager.

BI Intelligence, Business Insider’s premium research service, has compiled a detailed report on cybersecurity that details the current landscape for companies in critical infrastructure sectors, as well as how companies can protect their control systems from hackers.

Here are some of the key points from the report:

  • Companies that operate critical infrastructure sites reported 295 cyber incidents in 2015, up from 245 in 2014.
  • Hackers are targeting the industrial control systems that operate critical infrastructure because of the enormous damage they can cause by crippling such infrastructure.
  • Industrial control systems typically weren’t designed to be connected to the internet, so they weren’t built with cybersecurity capabilities to ward off hackers.
  • The hack that caused a blackout in the Ukraine could serve as a blueprint for other hackers that want to target critical infrastructure, helping them succeed in future attackers.
  • The Ukraine hack highlighted the importance of training employees about cybersecurity and placing additional access controls on industrial control systems beyond firewalls.

In full, the report:

  • Explains the challenges that companies face in securing industrial control systems that they are connecting to the internet.
  • Breaks down what made the hack against the Ukraine’s power grid so successful.
  • Highlights how this attack will impact other companies operating critical infrastructure.
  • Details the best methods for securing industrial control systems against hackers.

Interested in getting the full report? Here are two ways to access it:

  1. Subscribe to an All-Access pass to BI Intelligence and gain immediate access to this report and over 100 other expertly researched reports. As an added bonus, you’ll also gain access to all future reports and daily newsletters to ensure you stay ahead of the curve and benefit personally and professionally. >> START A MEMBERSHIP
  2. Purchase & download the full report from our research store. >> BUY THE REPORT

The choice is yours. But however you decide to acquire this report, you’ve given yourself a powerful advantage in your understanding of cybersecurity.