Easiest way to Crack Google Wallet pin

amit08255 By amit08255, 9th Apr 2014 | Follow this author | RSS Feed
Posted in Wikinut>News>Technology

Google wallet is one of many recent attempys to replace the use of traditional card-based payment instruments with the mobile payment system that works with near field communication technology to make electronic transactions with just the mobile device and user-defined PIN.

Cracking Google Wallet pin

To configure Google wallet, the user first need a Google account, a supported phone, and a suppported credit card. Once the Google account has been selected and validated, the application asks the user to input the physical credit card details.
After completing all the details, Google wallet sends an email to registered address with a code that should be entered in the application to confirm the registration. Once the registration is complete, Google wallet has access to full credit card details such as current balance, available credit, statement balance, and payment due date.
According to Google, all the information is stored encrypted in the Secure Element, a computer chip inside the phone that is the main security component of NFC system payments. When a user wants to make a payment, the authentication used by Google wallet is just a simple four digit PIN that is used to grant access to all sensitive data stored in Secure Element. The reason for choosing a weak password instead a strong one is that a complex one could be difficult to remember and the user might become frustated if the PIN is not correct. If the device is stolen and an Invalid PIN is entered five times, the application locks up completely.
But there is a vulnerability found in Google Wallet, that PIN is not stored inside the Secure Element, but instead in SQLite database that is only protected by Android Sandboxing protection mechanism that isolates access to data that belongs to one app from unauthorised access by other apps in the system. However, if the device is rooted, the protection no longer exists and a user with such privileges has access to the database.
Inside the database, Card Production Lifecycle ( CPLC) and the hashes PIN in custom protocol buffer, a .proto file, which is a data serialization format similar to JSON in concept.
The CLPC also contained the salt and hash of the salted PIN, which could be used to perform a brute-force attack against the SHA256 hex-encoded string to obtain the PIN.
The attack does not take too much effort because calculating four digit PIN requires calculating, at most 10,000 SHA256 hashes.
Attackers can also use Google wallet cracker to easily crack Google wallet pin.
I have published how to root Android devices to gain Root privilege in Android devices.
Read that article to make your hacking easy.
Visit here to read more on hacking android.

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