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#qrcodes

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CybersecKyle<p>QR Codes in Cybersecurity: Convenience Meets Caution <a href="https://www.cm-alliance.com/cybersecurity-blog/qr-codes-in-cybersecurity-convenience-meets-caution" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">cm-alliance.com/cybersecurity-</span><span class="invisible">blog/qr-codes-in-cybersecurity-convenience-meets-caution</span></a></p><p><a href="https://infosec.exchange/tags/Cybersecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cybersecurity</span></a> <a href="https://infosec.exchange/tags/Infosecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Infosecurity</span></a> <a href="https://infosec.exchange/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a></p>
Bill<p>Excellent qrcode generator that runs in the browser.</p><p><a href="https://ricardodeazambuja.com/barcodetool/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ricardodeazambuja.com/barcodet</span><span class="invisible">ool/</span></a></p><p><a href="https://infosec.exchange/tags/tools" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tools</span></a> <a href="https://infosec.exchange/tags/qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcodes</span></a></p>
IT News<p>Visual Code Generator to End All Generators - QR codes are something that we all take for granted in this day and age. There are... - <a href="https://hackaday.com/2025/06/23/visual-code-generator-to-end-all-generators/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2025/06/23/visual</span><span class="invisible">-code-generator-to-end-all-generators/</span></a> <a href="https://schleuss.online/tags/barcodehacking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>barcodehacking</span></a> <a href="https://schleuss.online/tags/barcodescanner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>barcodescanner</span></a> <a href="https://schleuss.online/tags/softwarehacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>softwarehacks</span></a> <a href="https://schleuss.online/tags/organization" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>organization</span></a> <a href="https://schleuss.online/tags/qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcodes</span></a> <a href="https://schleuss.online/tags/webapp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>webapp</span></a></p>
🏳️‍🌈🤘 Blain SmithNeed to generate a QR code without getting hounded with marketing emails and tracking what you do like a creepy company? Use <a href="https://libera.codes" rel="nofollow noopener" target="_blank">https://libera.codes</a> instead.<br><br><a href="https://snac.rblgk.sh?t=qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#QRCodes</a> <a href="https://snac.rblgk.sh?t=privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Privacy</a> <a href="https://snac.rblgk.sh?t=opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenSource</a><br>
ResearchBuzz: Firehose<p>Boing Boing: Doom in a QR code. “Backdooms is a Doom-like game that fits inside a QR code. That’s to say, the code of the game is so concise that it can be represented by a legit QR code, which offers a maximum of 3 kilobytes of data.”</p><p><a href="https://rbfirehose.com/2025/04/20/boing-boing-doom-in-a-qr-code/" class="" rel="nofollow noopener" target="_blank">https://rbfirehose.com/2025/04/20/boing-boing-doom-in-a-qr-code/</a></p>
Anne Delong<p>As this article illustrates, you can't tell where a QR code will lead when you read it with your phone. It's important to have a QR code reader that lets you look at the actual website URL before you decide to visit, not one that takes you there automatically.</p><p><a href="https://www.peninsulanewsreview.com/news/flyers-with-qr-code-raise-eyebrows-in-ladysmith-7952440?utm_source=flipboard&amp;utm_medium=activitypub" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">peninsulanewsreview.com/news/f</span><span class="invisible">lyers-with-qr-code-raise-eyebrows-in-ladysmith-7952440?utm_source=flipboard&amp;utm_medium=activitypub</span></a></p><p><a href="https://musician.social/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a> <a href="https://musician.social/tags/websites" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>websites</span></a> <a href="https://musician.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a></p>
Flippin' 'eck, Tucker!<p><span class="h-card" translate="no"><a href="https://mastodon.social/@glynmoody" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>glynmoody</span></a></span> Like so many things it's not really the technology that's at fault. QR codes are a convenient way of encoding &amp; transmitting information.</p><p>The problems are that (a) most phones are configured to automatically load the webpage pointed at by a QR Code (assuming it encodes a URL) and (b) the persistent problem behind almost all online scams -- users are not given the tools or knowledge to help them detect a fraud.</p><p>I use <a href="https://secuso.aifb.kit.edu/english/" rel="nofollow noopener" target="_blank">the SECUSO QR Scanner app</a> on my phone which not only displays the URL before launching it, but requires the user to check a confirmation box forcing you to think a bit more about what's about to happen.</p><p>Of course that only solves problem (a) above.</p><p><a href="https://social.chatty.monster/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a></p>
Glyn Moody<p>QR code '<a href="https://mastodon.social/tags/quishing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>quishing</span></a>' scams up 14-fold in five years - <a href="https://www.bbc.com/news/articles/cq6yznmv3gzo" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bbc.com/news/articles/cq6yznmv</span><span class="invisible">3gzo</span></a> this is why I hate <a href="https://mastodon.social/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a>, and avoid using them...</p>
Peter Nimmo<p>Well, duh...<br>"National Car Parks, which runs 800 car parking sites across the <a href="https://mastodon.scot/tags/UK" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UK</span></a>, is considering removing QR codes from its signage".<br>At one point, I thought of creating one for my <a href="https://mastodon.scot/tags/church" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>church</span></a> notice board, but decided against when alerted to the gaping security <a href="https://mastodon.scot/tags/problem" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>problem</span></a>!<br><a href="https://mastodon.scot/tags/CarParks" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CarParks</span></a><br><a href="https://mastodon.scot/tags/crime" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>crime</span></a><br><a href="https://mastodon.scot/tags/qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcodes</span></a> odes <br><a href="https://www.bbc.co.uk/news/articles/cq6yznmv3gzo" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bbc.co.uk/news/articles/cq6yzn</span><span class="invisible">mv3gzo</span></a></p>
Andy<p><a href="https://mastodon.scot/tags/Fraud" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Fraud</span></a> <a href="https://mastodon.scot/tags/QRCodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodes</span></a> <a href="https://mastodon.scot/tags/Parking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Parking</span></a> <a href="https://mastodon.scot/tags/Scam" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Scam</span></a> <a href="https://mastodon.scot/tags/Fraudulent" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Fraudulent</span></a> <a href="https://mastodon.scot/tags/Scams" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Scams</span></a> <a href="https://mastodon.scot/tags/ScamsAndFraud" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ScamsAndFraud</span></a> <a href="https://mastodon.scot/tags/Technology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Technology</span></a> <a href="https://mastodon.scot/tags/SmartPhones" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SmartPhones</span></a> <a href="https://mastodon.scot/tags/quishing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>quishing</span></a> <a href="https://mastodon.scot/tags/quishingScam" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>quishingScam</span></a> <a href="https://mastodon.scot/tags/QRCodeFraud" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodeFraud</span></a> <a href="https://mastodon.scot/tags/Cyber" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cyber</span></a> <a href="https://mastodon.scot/tags/CyberSecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CyberSecurity</span></a> <a href="https://mastodon.scot/tags/cybersecuritynews" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>cybersecuritynews</span></a> <br>Always worth a post when so many scams are out there. Beware QR codes!!!</p><p>Organised gangs behind rise in QR 'quishing' scams <a href="https://www.bbc.com/news/articles/cq6yznmv3gzo" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bbc.com/news/articles/cq6yznmv</span><span class="invisible">3gzo</span></a></p>
Andrii Mishkovskyi 🇺🇦<p>QR codes? QR codes! <a href="https://hachyderm.io/tags/qrcode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcode</span></a> <a href="https://hachyderm.io/tags/qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcodes</span></a> <a href="https://hachyderm.io/tags/kewahrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kewahrcodes</span></a> <a href="https://hachyderm.io/tags/kubecon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kubecon</span></a> <a href="https://hachyderm.io/tags/qrcon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcon</span></a></p>
AI6YR Ben<p>Apparently someone is sticking fake "Parking Payment" QR codes on parking meters in Manhattan Beach (California). </p><p><a href="https://m.ai6yr.org/tags/qrcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qrcodes</span></a> <a href="https://m.ai6yr.org/tags/scam" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>scam</span></a> </p><p>2025-04-01 13:26:52 PDT</p><p>The City warns residents and visitors about a scam involving unauthorized QR codes for parking payments. Currently, there are no QR codes for online payments at parking meters or pay stations.</p><p>Please avoid using any QR codes you come across, as they may lead to fraudulent sites. Only use official payment methods.</p><p>Report any suspicious activity to our Police Department. Stay safe and vigilant!</p><p>If you see a QR Code on a parking meter, do not scan it. Contact Manhattan Beach Police at (310) 545-4566.</p><p><a href="https://member.everbridge.net/311578402488335/notif/YuHHaxdfx" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">member.everbridge.net/31157840</span><span class="invisible">2488335/notif/YuHHaxdfx</span></a></p>
Elyse M Grasso<p>I have seen article claiming that <a href="https://historians.social/tags/Google" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Google</span></a> is going to switch to requiring use of <a href="https://historians.social/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a> (which I loathe) in order to use <a href="https://historians.social/tags/gmail" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gmail</span></a>, sometime in the not too distant future. The other email that I have used in the past gradually became useless in recent years (I suspect Gmail of blocking smaller mail servers) so I have just finished migrating everything to my gmail address, but it looks like I now need to migrate elsewhere. </p><p>Can people recommend a reliable email service?</p>
Terence Eden’s Blog<p><strong>Why are QR Codes with capital letters smaller than QR codes with lower-case letters?</strong></p><p><a href="https://shkspr.mobi/blog/2025/02/why-are-qr-codes-with-capital-letters-smaller-than-qr-codes-with-lower-case-letters/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">shkspr.mobi/blog/2025/02/why-a</span><span class="invisible">re-qr-codes-with-capital-letters-smaller-than-qr-codes-with-lower-case-letters/</span></a></p><p>Take a look at these two QR codes. Scan them if you like, I promise there's nothing dodgy in them.</p> <p>&nbsp;&nbsp;&nbsp;</p> <p>Left is upper-case <code>HTTPS://EDENT.TEL/</code> and right is lower-case <code>https://edent.tel/</code></p><p>You can clearly see that the one on the left is a "smaller" QR as it has fewer bits of data in it. Both go to the same URl, the only difference is the casing.</p><p>What's going on?</p><p>Your first thought might be that there's a different level of error-correction. QR codes can have increasing levels of redundancy in order to make sure they can be scanned when damaged. But, in this case, they both have <strong>L</strong>ow error correction.</p><p>The smaller code is "Type 1" - it is 21px * 21px. The larger is "Type 2" with 25px * 25px.</p><p>The <a href="https://www.qrcode.com/en/about/version.html" rel="nofollow noopener" target="_blank">official specification</a> describes the versions in more details. The smaller code should be able to hold 25 alphanumeric character. But <code>https://edent.tel/</code> is only 18 characters long. So why is it bumped into a larger code?</p><p>Using a decoder like <a href="https://zxing.org/" rel="nofollow noopener" target="_blank">ZXING</a> it is possible to see the raw bytes of each code.</p><p>UPPER</p><p></p><pre><code>20 93 1a a6 54 63 dd 28 &nbsp; <br>35 1b 50 e9 3b dc 00 ec<br>11 ec 11</code></pre><p>lower:</p><p></p><pre><code>41 26 87 47 47 07 33 a2 &nbsp; <br>f2 f6 56 46 56 e7 42 e7<br>46 56 c2 f0 ec 11 ec 11 &nbsp; <br>ec 11 ec 11 ec 11 ec 11<br>ec 11</code></pre><p>You might have noticed that they both end with the same sequence: <code>ec 11</code> Those are "padding bytes" because the data needs to completely fill the QR code. But - hang on! - not only does the UPPER one safely contain the text, it also has some spare padding?</p><p>The answer lies in the first couple of bytes.</p><p>Once the raw bytes have been read, a QR scanner needs to know exactly what sort of code it is dealing with. <a href="https://www.thonky.com/qr-code-tutorial/data-encoding#step-3-add-the-mode-indicator" rel="nofollow noopener" target="_blank">The first four <em>bits</em> tell it the mode</a>. Let's convert the hex to binary and then split after the first four bits:</p>TypeHEXBINSplitUPPER<code>20 93</code><code>00100000 10010011</code><code>0010 000010010011</code>lower<code>41 26</code><code>01000001 00100110</code><code>0100 000100100110</code><p>The UPPER code is <code>0010</code> which indicates it is Alphanumeric - the standard says the next <strong>9</strong> bits show the length of data.</p><p>The lower code is <code>0100</code> which indicates it is Byte mode - the standard says the next <strong>8</strong> bits show the length of data.</p>TypeHEXBINSplitUPPER<code>20 93</code><code>00100000 10010011</code><code>0010 0000 10010</code>lower<code>41 26</code><code>01000001 00100110</code><code>0100 000 10010</code><p>Look at that! They both have a length of <code>10010</code> which, converted to binary, is 18 - the exact length of the text.</p><p>Alphanumeric users 11 bits for every two characters, Byte mode uses (you guessed it!) 8 bits per single character.</p><p>But why is the lower-case code pushed into Byte mode? Isn't it using letters and number?</p><p>Well, yes. But in order to store data efficiently, Alphanumeric mode only has <a href="https://www.thonky.com/qr-code-tutorial/alphanumeric-table" rel="nofollow noopener" target="_blank">a limited subset of characters available</a>. Upper-case letters, and a handful of punctuation symbols: <code>space $ % * + - . / :</code></p><p>Luckily, that's enough for a protocol, domain, and path. Sadly, no GET parameters.</p><p>So, there you have it. If you want the smallest possible <em>physical</em> size for a QR code which contains a URl, make sure the text is all in capital letters.</p><p><a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://shkspr.mobi/blog/tag/qr/" target="_blank">#qr</a> <a rel="nofollow noopener" class="hashtag u-tag u-category" href="https://shkspr.mobi/blog/tag/qr-codes/" target="_blank">#QRCodes</a></p>
Alex Jimenez<p>How to Spot Fake <a href="https://mas.to/tags/QRCodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodes</span></a> and Keep Your Data Safe</p><p><a href="https://www.makeuseof.com/how-spot-fake-qr-codes/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">makeuseof.com/how-spot-fake-qr</span><span class="invisible">-codes/</span></a></p><p><a href="https://mas.to/tags/CyberSecurity" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>CyberSecurity</span></a></p>
Shantell Powell<p>Someone posts an image on social media containing a QR code for an event, but they don't include a link in the accompanying text. When I ask that person what the link for their event is, they say to scan the QR code. </p><p>How do I scan a QR code I'm seeing on my phone with the same phone?</p><p>What am I missing here? Is there some thing that everyone gets but me? Is there a way I can open a code I'm viewing on a device with that same device? <a href="https://c.im/tags/QRCodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodes</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://mstdn.social/@ntv" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>ntv</span></a></span> <a href="https://infosec.space/tags/Quishing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Quishing</span></a> ist nix neues.</p><ul><li>Es ist nur inzwischen extrem häufig, weil <a href="https://infosec.space/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a> ksine wirklichen <a href="https://infosec.space/tags/Sicherheitsmerkmale" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sicherheitsmerkmale</span></a> haben!</li></ul>
My camera shoots fascists<p><span class="h-card" translate="no"><a href="https://todon.eu/@CrimethInc" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>CrimethInc</span></a></span> </p><p>A couple examples of why you shouldn't scan random QR codes: <a href="https://www.techradar.com/computing/cybercrime/quishing-is-the-qr-code-scam-you-need-to-watch-out-for" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">techradar.com/computing/cyberc</span><span class="invisible">rime/quishing-is-the-qr-code-scam-you-need-to-watch-out-for</span></a></p><p><a href="https://archive.is/TRmfo" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">archive.is/TRmfo</span><span class="invisible"></span></a></p><p>Here's an article *promoting* the use of QR codes to collect data. Just by scanning the code, you are potentially giving up data. <br><a href="https://www.qrcodechimp.com/collect-first-party-data-with-qr-codes/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">qrcodechimp.com/collect-first-</span><span class="invisible">party-data-with-qr-codes/</span></a></p><p>Screenshot below is from the article.</p><p>Do not normalize using QR codes. All important information should be on the flyer, maybe with a QR code in the corner for people who want this. Have the URL printed out as well. The other thing to consider is that it is easy to create a fake URL that looks legitimate (e.g. with Cyrillic characters) and will fool most people at a glance. These fake URLs may even have a valid security certificate! Manually typing in the URL mostly bypasses this problem.</p><p><a href="https://sfba.social/tags/Privacy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Privacy</span></a> <a href="https://sfba.social/tags/Security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Security</span></a> <a href="https://sfba.social/tags/QRCodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodes</span></a></p>
Aral Balkan<p>Needless to say, don’t scan any random QR-codes you get spammed with here.</p><p><a href="https://mastodon.ar.al/tags/fediverse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fediverse</span></a> <a href="https://mastodon.ar.al/tags/spam" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spam</span></a> <a href="https://mastodon.ar.al/tags/QRCodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRCodes</span></a></p>
Kevin Karhan :verified:<p><span class="h-card" translate="no"><a href="https://furry.engineer/@soatok" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>soatok</span></a></span> +9001%</p><p><em>"<a href="https://infosec.space/tags/Quishing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Quishing</span></a>"</em> with malicious <a href="https://infosec.space/tags/QRcode" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcode</span></a>|s is rampant and even aided by the fact that most <a href="https://infosec.space/tags/QRcodes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>QRcodes</span></a> are run through <a href="https://infosec.space/tags/URLshorteners" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>URLshorteners</span></a>!</p>