RandomAccessFile v1.30 introduces two new methods named: WriteEncryptedObject and ReadEncryptedObject.
These methods are similar to WriteObject and ReadObject methods. The difference is that the new methods encrypt the object before writing it to a file and decrypt it before reading. The encryption algorithm is AES-256 which is considered to provide strong protection.
Android SQLite implementation doesn't support encryption. In many cases you can use these two methods instead. You can create a large Map or List with your own structures and save them to a file.
Edit: Using the new SQLCipher library you can encrypt SQLite databases: http://www.b4x.com/forum/basic4andr...id-database-encryption-sqlcipher-library.html
Developers who are not familiar with WriteObject / ReadObject should try these methods. They are very easy to use and allow you to store complicated objects in a single line of code. Unlike File.WriteMap / WriteList which convert the data to a string, WriteObject and WriteEncryptedObject can write many types of data without losing any information.
You can see more information about the supported types here: Basic4android - RandomAccessFile
Example of writing an encrypted List to a file:
Other more advanced encryption methods are available in the encryption library: http://www.b4x.com/forum/additional-libraries-official-updates/6839-base64-encryption-library.html
The library is available here: http://www.b4x.com/forum/additional...domaccessfile-v1-30-writeenctypredobject.html
These methods are similar to WriteObject and ReadObject methods. The difference is that the new methods encrypt the object before writing it to a file and decrypt it before reading. The encryption algorithm is AES-256 which is considered to provide strong protection.
Android SQLite implementation doesn't support encryption. In many cases you can use these two methods instead. You can create a large Map or List with your own structures and save them to a file.
Edit: Using the new SQLCipher library you can encrypt SQLite databases: http://www.b4x.com/forum/basic4andr...id-database-encryption-sqlcipher-library.html
Developers who are not familiar with WriteObject / ReadObject should try these methods. They are very easy to use and allow you to store complicated objects in a single line of code. Unlike File.WriteMap / WriteList which convert the data to a string, WriteObject and WriteEncryptedObject can write many types of data without losing any information.
You can see more information about the supported types here: Basic4android - RandomAccessFile
Example of writing an encrypted List to a file:
B4X:
Sub Activity_Create(FirstTime As Boolean)
Dim list1 As List
list1.Initialize
For i = 1 To 1000
list1.Add("Item #" & i)
Next
'writing the object
Dim raf As RandomAccessFile
raf.Initialize(File.DirRootExternal, "1.dat", False)
raf.WriteEncryptedObject(list1, "some secret password", raf.CurrentPosition)
'you can continue to write more objects to this file
'...
raf.Close
'reading the object
Dim raf As RandomAccessFile
raf.Initialize(File.DirRootExternal, "1.dat", False)
Dim list2 As List
list2 = raf.ReadEncryptedObject("some secret password", raf.CurrentPosition)
Log(list2)
raf.Close
End SubOther more advanced encryption methods are available in the encryption library: http://www.b4x.com/forum/additional-libraries-official-updates/6839-base64-encryption-library.html
The library is available here: http://www.b4x.com/forum/additional...domaccessfile-v1-30-writeenctypredobject.html
