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If you choose to implement encryption at the physical layer, it might be because: Either you need for some reason to support anything which could compose the link layer 2, you want your encryption scheme to be independent and transparent to potentially unsecured upper layers. Some requirement make it unavoidable to work as close to the physical as ...


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You could think of Quantum Cryptography as a form of cryptography at the physical level. Quantum Cryptography uses the properties of quantum mechanics to send messages that can't be intercepted by a 3rd party. It's not cryptography in the strictest sense, but it serves the same purpose of preventing 3rd parties from intercepting data. Of course, it ...


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The job of physical layer is to transmit the data over some channel(cable or wireless medium). If encryption was done at the physical layer, then all the data, including the application data, the destination IP address, port number, different headers, etc. will be encrypted as well. When this encrypted data will be transmitted, the next node(router,switch, ...


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The data link layer is the lowest layer where actual data is exchanged, the physical layer immediately below that is the mechanism for passing that data. You could insert an encryption layer in between your physical layer and your data link layer that flips bits on the wire in a manner that a device at the other end would be able to decode, but really all ...


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Windows Firewall if is enabled blocks unsolicited connections to your computer. So any programs can connect to internet if user's actions make that happent but no connection can inbound whitout a previously demand. In conclusion: no IN without OUT and vice versa no OUT denies IN.


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Whatever the strength of your password is, do not reuse it for the simple reason that positively reputed ecommerce websites may store your password in plaintext (which thing I personally experienced). So in case the database of such websites is compromised then the common reflexe of a hacker is to try reusing your password elsewhere.


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I think this question can begin to be answered by this graphic, which shows what security people think versus average people about best practices for information security. Note that the average person thinks using a strong password (meaning a complex, difficult-to-guess gibberishy password) is a priority, while security professionals view a unique password ...


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It's never a good idea to use the same password in different places. If you're having trouble remembering your passwords, have a base password, then append something to it and make that your actual password. For example, let's say your base password is cary1bondoc21cary2bondoc At work, you'll use cary1bondoc21cary2bondocworking Your facebook can be ...


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You should never reuse passwords, because this way, if someone somehow steals you the password for a personal account, they have immediate access to other accounts. Also, this way he/she would also get access to your work account and could impersonate you there. Also, yes, your company can be recording your password, it could even store it in plaintext. It ...


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That code is an OEM product code, which means that it's baked into the firmware somewhere. Copying the code won't allow you to install Windows on another machine, so there's no real need to secure it by removing the sticker.


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One measure to seriously take into consideration with laptop theft protection is physical security. Your thief may not be tech savvy enough to avoid the traps you set, but he's got the unit in his hands already, and depending on what he wants to do with it he can always make a quick buck on the hardware alone. In previous companies I've worked for they did ...


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Have you considered the possibility that a thief opens a laptop, resets the BIOS (by removing the CMOS battery)? Or that the SSD can be removed and wiped/ replaced by a different disk? If you disregard those situations, then you can try to find an option in your BIOS Setup to disable booting from USB and configure a BIOS Setup password. Also note that the ...



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