Android Question How protection api key in app

lemonisdead said:

If you can rely on an external server you could encrypt/decrypt the key received from a server ; using your own complex algorithm. Or you could take a look at Informatix Pro Bundle which contains a steganography library.

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Pooya1 said:

How do steganography library working?

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• F5Steg
  
  • Events:
    • ArrayExtracted (SecretMessage() As Byte)
    • Embedded (OutFileName As String)
    • StringExtracted (SecretMessage As String)
  • Functions:
    • EmbedArray (InFileName As String, OutFileName As String, SecretMessage As Byte(), JpgQuality As Int, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the application signature and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedArray2 (InFileName As String, OutFileName As String, SecretMessage As Byte(), JpgQuality As Int, Password As String, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the specified password and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedString (InFileName As String, OutFileName As String, SecretMessage As String, JpgQuality As Int, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the application signature and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedString2 (InFileName As String, OutFileName As String, SecretMessage As String, JpgQuality As Int, Password As String, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the specified password and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • ExtractToArray (FileName As String, EventPrefix As String)
      Extracts and decrypts the array of bytes hidden in the given JPEG file with the application signature.
      When done, an ArrayExtracted event is raised.
    • ExtractToArray2 (FileName As String, Password As String, EventPrefix As String)
      Extracts and decrypts the array of bytes hidden in the given JPEG file with the specified password.
      When done, an ArrayExtracted event is raised.
    • ExtractToString (FileName As String, EventPrefix As String)
      Extracts and decrypts the string hidden in the given JPEG file with the application signature.
      When done, a StringExtracted event is raised.
    • ExtractToString2 (FileName As String, Password As String, EventPrefix As String)
      Extracts and decrypts the string hidden in the given JPEG file with the specified password.
      When done, a StringExtracted event is raised.

DonManfred said:

Maybe this helps here
F5Steg

Author: F. Leneuf-Magaud/Informatix
Version: 1.2

• F5Steg
  • Events:
    • ArrayExtracted (SecretMessage() As Byte)
    • Embedded (OutFileName As String)
    • StringExtracted (SecretMessage As String)
  • Functions:
    • EmbedArray (InFileName As String, OutFileName As String, SecretMessage As Byte(), JpgQuality As Int, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the application signature and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedArray2 (InFileName As String, OutFileName As String, SecretMessage As Byte(), JpgQuality As Int, Password As String, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the specified password and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedString (InFileName As String, OutFileName As String, SecretMessage As String, JpgQuality As Int, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the application signature and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • EmbedString2 (InFileName As String, OutFileName As String, SecretMessage As String, JpgQuality As Int, Password As String, EventPrefix As String)
      Encrypts and hides the specified secret message in the given image (bmp, png or jpg).
      The encryption is done with the specified password and the resulting image is a JPEG file.
      When done, an Embedded event is raised.
    • ExtractToArray (FileName As String, EventPrefix As String)
      Extracts and decrypts the array of bytes hidden in the given JPEG file with the application signature.
      When done, an ArrayExtracted event is raised.
    • ExtractToArray2 (FileName As String, Password As String, EventPrefix As String)
      Extracts and decrypts the array of bytes hidden in the given JPEG file with the specified password.
      When done, an ArrayExtracted event is raised.
    • ExtractToString (FileName As String, EventPrefix As String)
      Extracts and decrypts the string hidden in the given JPEG file with the application signature.
      When done, a StringExtracted event is raised.
    • ExtractToString2 (FileName As String, Password As String, EventPrefix As String)
      Extracts and decrypts the string hidden in the given JPEG file with the specified password.
      When done, a StringExtracted event is raised.

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DonManfred said:

It is NOT my bundle! The library is from @Informatix

But there is an example project inside the Bundle to show the Features.

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