You can tell if your computer is safe by a number of different things. One of them is if the computer is using cryptography to send a receive messages. You can tell if your computer is using this by seeing the little lock at the top of the browser where the URL is. Cryptography uses a code, with numbers or letters that are jumbled up and sent to the receiving end, this is called the cipher text. The receiving end creates its own key to decrypt the message. Another way I can tell if my computer is safe, looking at the site itself, for example if it is a bank, a trusted bank, usually those sites are secure. Sites that are typically sketchy, are the ones that look funny, like if it’s a name that you never heard of or they have products on there that are way too cheap, like too good to be true. Sites that establish a secure connection using cryptography or encryption, will have the lock where the URL is or at the beginning of the URL, it begins with HTTPS. Not all computers are secure, for example, each computer has bugs or software glitches. Those bugs and software glitches can allow hackers to gain access to those personal keys and possibly intercept the message that is being transmitted to the receiver. Those bug fixes, if recognized by the manufacture, like Microsoft or Apple, they are fixed in a software update. That is another way to tell if a computer is safe, is by seeing if all its software is up to date, like updates to the operating system, simple updates to the web browsers, or updates to any antivirus software that is installed. Antivirus software scans downloads and files on the computer to make sure they do not contain any corrupt or malicious files.