## 3 Chidroid Architecture
### Android Permission Retrieval
The fourth log message is an error log message indicating that the application has failed to retrieve data from a server. In the Logcat output (Listings 10 and 11), each log message is printed on a separate line and includes the following information:

* Timestamp: The date and time at which the log message was generated, in the format YYYY-MM-DD HH:MM:SS. * Log level: The severity of the log message, which can be one of the following: DEBUG, INFO, WARNING, ERROR, or FATAL. * Application name: The name of the application or system that generated the log message. Log tag: A short string that provides additional context about the log message. * Log message: The actual log message that provides information about the state or behaviour of the application or system. ```
112-0517:48:28.2152645826458 VGraphicsEnvironment:ANGLEDeveloperoptionfor'com.google\(\leftarrow\).android.apps.messaging'setto:'default'
212-0517:47:04.95081138113 DHansCommunication:HansCommunication::configCheckedUid\(-\leftarrow\)10302,type=0
312-0517:46:52.93520583726 IOpilusHansManager:uid=10302,pkg=com.spotify.musicFexit(),\(\leftarrow\)reason=Broadcast
412-0517:46:52.93538013801 DeviceInfoHidClient:isRadioOn()=true
512-0517:48:28.51720587258 WPackageManager:packageunknownuid10223 pid26458 call\(\leftarrow\)SetEnabledSetting(com.google.android.apps.messagingcomponent=com.google.android.ims.\(\leftarrow\)binding.SystemBindingService,1,0x1,0)
612-0517:48:28.5192645826492 IBugleRcsEngine:[1364]bdre.run:SystemBindingManager:\(\leftarrow\)SystemBindingenabled:true
612-0517:48:28.5202645826492 IBugleRcsEngine:[1364]bdrf.b:SystemBindingupdated
612-0517:47:04.02238727096 EBatteryAppStats:Uid=10317;pkgName=gr.winbank.\(\leftarrow\)mobilenext;GpsPower=1.253625 mAh;GpsTotalPower=0.0 mAh
```
Listing 11: Example output using Logcat. By regularly checking logs (Listing 11), it is possible to identify potential security risks and take the appropriate actions to mitigate them. For example, if the log contains a message like \"User logged in successfully\", this indicates that a user has successfully logged into the app. However, if the log contains a message like \"User login failed\", this may indicate a potential security risk, such as an incorrect password or username used in an attempted login. In this case, it would be important to investigate the issue further and take appropriate action to secure the system, such as requiring the user to reset his/her password or blocking the device's IP address that made the failed login attempt. ### Package Manager

The Package Manager is a system service on Android devices and is used to manage the installation, removal, and updating of software packages. One of the tasks that can be performed using the Package Manager is to enumerate the list of software packages installed on the device. To do this, the following command can be used (Listing 12):
```
1 pmlistpackages
```
This command (Listing 12) will display a list of all software packages installed on the device, along with their package names and versions (Listing 13). For example, the output of the command \"pm list packages\" might look as follows. ```
1 com.skype.raider:8.66.0.123 cn.wps.xiaomi.abroad.lite:6.2.23 com.aviapp.translator:1.3.5 com.adobe.reader:20.6.0 com.linkedin.android:16.0.0.226 com.termux:0.115
```
Listing 13: Installed software packages. In this example, the package names are listed on the left, followed by the version numbers in parentheses. The version number consists of three or four parts, separated by periods. The first number indicates the major version, the second the minor version, and the third the patch level. The fourth number, if present, indicates a build number. The command \"pm list packages\" can be used to obtain a list of all installed packages on the device, or the \"-f\" flag can filter the output based on a specific package name or part of a package name. For example, to list all installed packages that contain the word \"skype\" in the package name, use the following command (Listing 14).