QR code securityWith smartphones becoming integrated into every aspect of our lives, QR codes have become a critical issue. We now use them not only to browse menus in cafes, but also for banking transactions, payments, identity verification, and even government services. However, this widespread use has also opened the door for malicious individuals to exploit QR codes. Since 2023, there has been over a 400% increase in QR code-related fraud cases worldwide. In this guide, you will learn step-by-step what security risks QR codes pose, QR code phishing attacks known as "quishing," and how to protect yourself from these threats.
Are QR codes safe on their own?
The short answer to this question is: Yes, the QR code itself is safe. However, the content it redirects to may be harmful.
A QR code is simply a carrier of information. Think of it like an address written on a piece of paper. If the address is correct, your destination is safe; if the address is incorrect, it could lead you to a dangerous place. The QR code itself doesn't contain viruses because it's just an image. However, the data (URL, text, etc.) contained within the QR code could be malicious.
For example:
- A real cafe's menu QR code → safe
- A fake QR code could redirect you to a bank phishing site.
- Your own created Wi-Fi QR code → secure
- Finding an unfamiliar QR code on the street could be risky.
Therefore, QR code security is not about "scanning the code," but about "what you do before and after scanning the code."
The Most Common QR Code Security Threats
1. Quishing (QR Phishing)
“Quishing” (QR + Phishing) is a type of cyberattack that has rapidly become widespread in recent years. The attacker creates a fake QR code impersonating a real brand (bank, shipping company, government agency). When the victim scans the code, they are redirected to a fake website where they are persuaded to enter their personal information (username, password, credit card number).
A real-life example: In 2023, thousands of people in Türkiye received a message saying, "Your package could not be delivered to your address. Scan the QR code to choose a new delivery date." When the QR code was scanned, a fake shipping tracking website opened, and users were asked for their personal information.
2. Fake Payment QR Codes
In restaurants, supermarkets, or marketplaces, a fake QR code is pasted over the real payment QR code. When the customer scans the code to pay the bill, the money goes to the attacker's account instead of the business.
A real-life example: In 2022, it was discovered that several cafes in Istanbul had fake QR codes pasted over the payment codes on the tables. While customers thought they were paying their bills, the money went to the scammer.
3. Wi-Fi QR Code Attacks
In public areas (airports, cafes, hotels), fake Wi-Fi QR codes are used to lure users into a fraudulent network. All internet traffic can be monitored through this network, and passwords and credit card information can be stolen.
4. Installing Malicious Applications
Some QR codes redirect you directly to download a harmful APK (Android application). When the user downloads it, thinking it's an "update" or "add-on," their device becomes infected with malware.
5. Physical QR Code Modification (Sticker Attack)
The attacker places a fake QR code sticker over a real QR code. The victim, believing it to be the real code, scans it and is redirected to a fake website. This method is particularly common at parking lot payment points, electric charging stations, and restaurant tables.
6. Digital Wallet Fraud
Cryptocurrency wallet addresses are shared via QR codes. The attacker sends the QR code of their own wallet or displays their own code during a product sale. The victim thinks they have made the payment, but the money goes to the attacker.
7. Social Engineering Attacks
QR codes are not just a technical attack tool; they are also used for psychological manipulation. Users are encouraged to scan the code with attractive promises such as "Free Wi-Fi," "Discount coupon," or "You've won a prize."
8. Phishing Forms
The fake page that opens when the QR code is scanned is designed to resemble the login screen of a real institution. When a username, password, or national identity number is entered, this information is transmitted to the attacker's server.
QR Code Security Statistics (2026)
| Data | Value |
|---|---|
| Increase in QR code-related fraud (2023-2025) | +437% |
| The share of quishing attacks in total phishing attacks. | %22 |
| The percentage of users who scan QR codes and then undergo security checks. | %8 |
| Rate of malware infection via QR codes on mobile devices | %5.4 |
| Average compensation amount (per case) | ~2.500 TL |
These figures demonstrate just how serious an issue QR code security is.
15 Golden Rules for QR Code Security
1. Do not scan QR codes from unknown sources.
Do not scan QR codes that are randomly pasted on the street, hand-drawn, dropped in your mailbox, or sent by a stranger. Prefer codes from trusted sources.
2. Check the Physical Integrity of the Code
Check the QR codes you see on restaurant tables, in parking lots, or at electric charging stations to see if they are stickers that have been added later. Any bleeding edges, color mismatch, or an unusual paper texture should raise suspicion.
3. Check the URL Before Scanning
Modern phones display the URL first when scanning a QR code. Make sure the address is correct before going to the site. For example:
- TRUE:
https://www.garanti.com.tr - Fake:
https://garanti-giris-guvenlik.com - Fake:
https://garanti.com.tr-guvenlik.net
The domain name always comes after the last dot. Addresses like “garanti.com.tr.xyz.com” are fake.
4. Check the HTTPS Certificate
Look for a lock icon (HTTPS) in the address bar of the site you're redirected to. But remember: HTTPS doesn't mean the site is trustworthy. It only indicates an encrypted connection. Even scammers can use HTTPS.
5. Be cautious with forms that request personal information.
If the page that opens after scanning the QR code asks for a password, credit card number, Turkish ID number, or SMS code... Stop and close the page. No corporate QR code would ever request this type of information.
6. Verify the Code in Banking Transactions
If a QR code that you believe is from your bank redirects you to their banking app, please access your bank's official app directly and complete the transaction there before opening the QR code.
7. Be suspicious of QR codes received via SMS and email.
If you receive a QR code via an unexpected SMS or email, verify it even if the sender is a legitimate organization. Contact the organization's customer service or confirm the details on their official website.
8. For Businesses: Create Your Own QR Code
If you own a cafe, restaurant, hotel, or shop, create your own QR codes to offer to your customers. The code... a reliable QR code generator Produce it using this method and check it regularly. Conduct regular checks to prevent the pasting of counterfeit code.
9. Use Physical Protection
Protect the QR codes in your business with acrylic stands, glass frames, or laminated coatings. This will make it more difficult for stickers to be applied over them.
10. Use a modern phone.
Older operating systems have known security vulnerabilities. Install Android and iOS updates regularly.
11. Use a Reliable QR Reader
Your phone's built-in camera app is the safest option. Third-party QR reader apps may collect your data or display ads. Use the built-in reader if possible.
12. Use a VPN
Use a VPN when connecting to public Wi-Fi networks. This ensures your data is encrypted and protects against potential eavesdropping attacks.
13. Use Two-Factor Authentication (2FA)
Enable two-factor authentication on all your important accounts (bank, email, social media). This way, even if your password is stolen, no one will be able to access your account.
14. Report if you suspect anything.
If you see a QR code that you suspect is fake, report it to the relevant business, your bank, or cybersecurity unit. In Türkiye, USOM (National Cyber Incident Response Center) accepts such reports.
15. Be Aware
The strongest defense is awareness. Be aware that scanning QR codes can be a risk, don't act hastily, and approach attractive offers with skepticism. Nothing is "free".
5-Second Checklist Before Scanning the QR Code
Ask these 5 questions before scanning a QR code:
- Who created this code? Do I know its source?
- Has the code been tampered with? Are there any stickers, overflows, or color differences?
- Which site is this redirecting me to? Is the URL correct?
- What does he want from me? Password, card information, or ID?
- Am I being rushed? Is there pressure like "immediately," "last 24 hours," or "free"?
If you cannot answer any of these 5 questions Do not scan the code.
QR Code Security Guide for Businesses
Businesses are responsible for the QR codes they provide to their customers. Take the following precautions:
- Keep a record: Note which QR code you generated and when.
- Check regularly: Check weekly that your QR codes are in place and that no fake codes have been pasted.
- Apply physical protection: Acrylic stand, glass frame or laminated coating.
- Updatable system: Quickly update your QR code when your password or URL changes.
- Customer training: Add notes to menus or signs such as "This QR code belongs to us, please verify."
- Staff training: Teach your employees the signs of fake QR codes.
- Complaint mechanism: Enable your customers to report suspicious codes.
Security When Generating QR Codes
When creating your own QR code, keep the following points in mind:
- Choose static codes: Static QR codes contain only the data you specify and are not dependent on a server.
- Use reliable tools: Choose tools that don't collect your data or add watermarks.
- Use HTTPS: If the code redirects to a URL, it must be HTTPS.
- Use a short URL: Shortened URLs make it harder to verify the source. Use the full URL whenever possible.
- Be careful when adding a logo: If the logo makes the code difficult to read, abandon it.
- Test yourself: Test your code on different phones and in different QR reader apps.
HunHax free QR code generator, the codes you create They don't store it on their servers. And it doesn't collect any tracking data. Therefore, it's ideal in terms of privacy and security.
QR Code vs. Barcode: The Security Difference
| Security Feature | Barkod | QR Code |
|---|---|---|
| Content complexity | Low | High |
| Risk of manipulation | Low | High |
| Phishing risks | None | Our |
| Harmful redirection | It's impossible. | Possible |
| Easy to counterfeit | Difficult | Easy (removal method) |
| User control | None | Yes (URL preview) |
Barcodes are resistant to manipulation because they only contain product numbers. QR codes, on the other hand, are more susceptible to misuse because they can carry rich content such as URLs, text, or vCards.
Frequently Asked Questions
Is scanning QR codes safe?
QR codes themselves are safe, but the links they redirect to can be harmful. It's safe to scan codes from sources you know and trust. Avoid scanning codes you find randomly on the street.
Can QR codes spread viruses?
QR codes themselves do not carry viruses. However, if scanning the code redirects you to download a malicious application or a harmful website, your device may become infected with malware. Therefore, do not scan unknown codes.
Should I scan the QR code I received from my bank?
Instead of scanning QR codes directly from your bank, log into your bank's official app and complete the transaction there. This eliminates the risk of receiving a fake code.
How to spot a fake QR code?
Watch out for these symptoms:
- It has stickers that were applied later.
- Color or size difference
- The URL does not belong to the correct institution.
- Forms requesting personal information
- Urgent warnings
What is quishing?
Quishing is a portmanteau of "QR" and "phishing." It is a phishing attack carried out using QR codes. The attacker directs the victim to a deceptive website with a fake QR code and attempts to steal their personal information.
Where can I report a fake QR code?
In Türkiye, you can report the incident to USOM (usom.gov.tr). You can also file a complaint with the relevant business, your bank, or chamber of commerce.
How can I protect QR codes in my business?
Use an acrylic stand, glass frame, or laminated finish. Check the code regularly. Make your staff aware. Add a note to your customers saying, "This code belongs to us."
What should I do if a fake code is pasted over my QR code?
First, remove the fake code. Inform your customers of the situation. If necessary, contact law enforcement or USOM (National Cyber Security Center). Take physical security measures to prevent the incident from recurring.
Are HunHax QR codes secure?
Yes. QR codes generated with HunHax are completely static; they are not stored on our servers, and no data is collected. They only contain the information you entered.
How do I protect my privacy when creating a QR code?
Use tools that don't collect your data, don't require an account, and don't store it on their servers. HunHax meets all of these criteria. Also, carefully choose the content of the code you create — for example, don't put your personal information in a QR code.
Conclusion
QR codes are fantastic tools that make our lives easier. However, like any technology, there is a risk of them being misused by malicious individuals. QR code security is as much about user awareness as it is about the technology itself.
By following the 15 golden rules in this guide, using the 5-second checklist, and acting responsibly, you can protect yourself from QR code-based threats. Remember: Don't have it read if you have any doubts.
Your own QR codes HunHax free QR code generator You can create it safely with [the tool/guide]. For our other guides... What is a QR Code?, How to create a Wi-Fi QR code?, vCard QR Code Guide ve Areas of Using QR Codes You can browse our pages.