I have Samsung Galaxy Star (GT-S5282) with 4.1.2. I wanted to store my bank and credit card information in password protected Memo. How secured is password protected Memo? Is there a way to crack the password of secured Memo? Is it possible for someone to root the phone and get the file/database of memo and get the details stored in password protected memo?
In general it's not a good idea to store sensitive data on your mobile phone, but back to your question.
S Memo is storing your password as a clear text in
/data/data/com.sec.android.provider.smemo/databases/pen_memo.db > CommonSettings > PREF_APPLOCK_PIN so if your device is rooted you can use Root Explorer to read it.
Which means that this application is not secure. You can use KeePasDroid to encrypt passwords or other sensitive data. I am using it on my laptop and on my Android device.