(more on this later)Given how expensive ASICs is, many consumers don't have sufficient capital to invest in it to make it profitable which is why a mining calculator is so important, you need to figure out if you can get your operation to scale to make every day worthwhile in the BTC space. Is Bitcoin Mining Still Profitable in 2020? A lot of people ask us how many bitcoins can you mine in a day? There is no real-world answer for this, but every block reward itself is given every 15 mins so you can some what adjust for the day, but it is largely very expensive to build a profitable rig and I would not by my nature suggest it as the best directive, I prefer more liquid and evergreen investments. We have to use the calculators and based on our electricity cost come out as advantageous. The power cost has long been a reason for overseas mining to take place. With the decreasing block reward price for the Bitcoin Halving is going to likely play an important role. Lastly, you need to understand that hardware cost is also going to play an important role in whether or not you come to our ROI + on any of your mining endeavors. This has resulted in large corporations operating mining farms that have thousands of ASICs. You know that blinking light on your hard-disk drive (HDD) that tends to flicker non-stop? Well, it could be used to steal data from your computer, without you even knowing it was happening.An average person generally cannot afford to buy even one ASIC let alone thousands. Security researchers from Ben Gurion University in Israel recently demonstrated an attack in which they infected a target machine with malware that was able to control the LED, and cause it to blink in a pattern which transmitted encoded data from the machine. What’s worse is that the sensitive data was leaked from an air-gapped computer, the research report said.Īs noted by ZDNet’s Liam Tung, an air-gapped machine is one that is physically isolated from unsecure networks and, in theory, is harder to hack. SEE: Report: Data breaches growing more complex, causing more damage However, that doesn’t mean that it is impossible to exfiltrate the computer’s data, as shown in this demonstration.

In a YouTube video put together by the researchers, a drone with a camera is flown up multiple stories outside of an office building until it locates the blinking HDD LED. The 10 best antivirus products you should consider for your business Pentagon finds concerning vulnerabilities on blockchain Once it is in the line of sight of the LED, it records the blinks and steals the data.

Security incident response: Critical steps for cyberattack recovery (TechRepublic Premium)Īccording to the research report, the LED can be forced to blink at up to 5800 blinks per second, which is a rate that isn’t able to be perceived by the human eye. And, even if it was, the normal operation of the LED is to blink frequently. This makes the attack covert in that it likely wouldn’t be noticed by the user if it occurred. “Our experiment shows that sensitive data can be successfully leaked from air-gapped computers via the HDD LED at a maximum bit rate of 4000 bit/s (bits per second), depending on the type of receiver and its distance from the transmitter,” the report said. “Notably, this speed is 10 times faster than the existing optical covert channels for air-gapped computers. These rates allow fast exfiltration of encryption keys, keystroke logging, and text and binary files.”Ĭiting other research, the report noted that the computer LED could be detected by certain cameras from 30 meters away or further.

To encode the actual data, the report cited three main methods for doing so: on-off keying (OOK), Manchester encoding, and Binary Frequency Shift Keying (B-FSK). The researchers looked at multiple cameras and sensors, most of which performed with differing bit rates and bandwidths.Ī host of different countermeasures were presented. Procedurally, concerned businesses could ban cameras, cover or disconnect LEDs, and shield windows. The 3 big takeaways for TechRepublic readers On the technological side of things, businesses can invest in LED activity monitoring software, an LED activity monitoring camera, or signal jamming software.

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