"Is this listing really worth the price?"
App Integrity – Why is preventing counterfeiting and tampering in real estate apps a top priority?
One day, a user called the real estate app customer service center. "The jeonse listing I saw yesterday has a different price. It was clearly 300 million won."
The representative checked the server records, but the price had been recorded as 350 million won from the beginning. The problem was the "app screen" the user was viewing.
The app the user had installed was a "fake real estate app," a repackaged version of the legitimate app.
Real Case – What Happened with a Counterfeit and Tampered Real Estate App
Investigating this incident, we discovered that the attack method was simpler than expected.
• Extracting the legitimate real estate app APK
• Modifying some of the logic related to advertising and commissions
• Hooking the listing price display logic
• Repackaging the app name and icon as is
• Distributing it through external communities and messengers
Users had no choice but to believe it was the legitimate app because ✔ the logo, ✔ the UI, and ✔ the functionality all appeared to be normal.
Where did the security issue arise?
There was only one core issue: the app wasn't verified as authentic.
Specifically,
•The app signature wasn't checked for forgery,
•The code wasn't checked for tampering at runtime,
•Repackaged apps were still able to run normally.
As a result,
•Price manipulation,
•Ad display logic tampering,
•Distortion of brokerage commission flow,
•A collapse of user trust.
This was the moment when "trust," the most important value of a real estate app, was destroyed.
How did LIAPP protect against this?
LIAPP – App Integrity & Forgery/Modification Detection
LIAPP verifies the following at app launch and runtime: • Detects code modifications
• Detects traces of repackaging and patching
• Rooted devices
• Emulators
• Debugging environments
Apps that are not official builds are blocked from running → Fake apps are immediately terminated during app execution. A structure is established that ensures the service only opens when the app is genuine.
What has changed since then?
After implementing security measures, the changes were clear.
• 0% execution rate after distribution of fake apps
• Complete blocking of price manipulation cases
• Sharp reduction in attempts to manipulate advertising and commission logic
• Reduced customer service complaints
• Restored user perception that "this app is trustworthy"
• Restored trust = service survival
Lesson learned – Integrity is not a 'choice' in real estate apps
Real estate apps are not simply information apps.
• Criteria for judging personal assets
• Family residence decisions
• Important life choices
All these decisions are based on the 'information displayed in the app.'
✔ Is the app authentic?
✔ Is the code tampered with?
✔ Is only the official app accessing the service?
If these are not guaranteed, no matter how good the listing, UX, or marketing is, it's meaningless.
Real estate app security always begins with "app integrity."
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