Justin Coffman

Author: Justin

  • OpenSSL RSA Commands

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    This is another post mainly as a reference for myself. Generate private key Add 1024/2048/4096 to specify length. Defaults to 2048. Generate public key Encrypt file Decrypt file Hash file Not technically RSA, but you need to do it to sign/verify. (You actually can sign unhashed files, but they have to be less than 64…

  • VPN is not a security product

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    I’m sure you’ve seen tons of ads for VPN’s. One thing usually in common is that they advertise that it will improve your online security and that you can’t live safely without it. Here’s the thing: VPN really isn’t for security. Encryption Now, it is true that VPN does encrypt your connection. You know what…

  • Some funny little IP addresses

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    Here’s some IP addresses (and email addresses) of some spam comments that came in. Do what you will with them. I’ll probably update this list if some more unique ones come in. Have fun!

  • OpenSSL generate self-signed certificate one-liner

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    For future me when I don’t have the batch file: Remove -noenc if you want a password on the PEM file(s). (I don’t know if it’s just for the private key or if it’s for both, I’ve always used -noenc.) By default, the certificate expires in 30 days. Add -days xxxxx to make it longer.…

  • RCS Explained

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    There are two main texting standards: SMS/MMS and RCS. SMS/MMS sucks. That’s why Apple created iMessage, which is by all accounts better than SMS/MMS. RCS Now, however, the modern texting standard is RCS, and has been for multiple years. RCS is way better than SMS/MMS because it has all the key features from iMessage like…

  • Dustpans suck

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    Rarely do I use an invention as ineffective as the dustpan. If soap gets 99% of germs then a dustpan gets 1% of dirt. A dustpan is to a broom as a decorative case is to a phone. A dustpan has the pickup effectiveness of a paper towel. The thing can’t have dirt swept into…

  • Use PowerShell

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    The Windows Command Processor is severely outdated. It was never meant to be used as your main command line tool in Windows after Windows PowerShell replaced it as the default in Windows 10 build 14791. Yet we all seem to collectively switch back to CMD. Why? Pitfalls of CMD Command Prompt was originally made as…

  • Tech companies that don’t get enough credit

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    People love to hate on tech companies when they get big enough. Now, to be fair, I like it too, but there are some companies who deserve some more credit. Here’s a bunch that I thought of off the top of my head. Google Yes, I know they’re now a convicted monopoly. But let’s be…

  • Learning WordPress – Part 2

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    Part 1 I almost forgot to make a part 2 but then I saw part 1 and said to myself, “Oh yeah, I should make part 2 sometime.” A few days after thinking that, now I’m writing this post. Anyways, let’s continue with: WordPress Settings What I did for this wasn’t very interesting, I just…

  • I hate the news

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    I can’t stand watching the news. I don’t just mean one specific news outlet, I mean all of them. They all make so many exaggerations or flat-out lies on both sides and it annoys me so much to watch. The main issue is they don’t report actual news 90% of the time. Tell me about…