secure my presentations

  • Status: Closed
  • Prêmio: $30
  • Inscrições Recebidas: 5
  • Vencedor: chathusrilanka

Painel de Comentários

  • BETA911
    BETA911
    • 10 anos atrás

    If this solution fits your needs, let me know.

    • 10 anos atrás
    1. BETA911
      BETA911
      • 10 anos atrás

      @amrosamaeg, I can build a simple and fast example if you want to test it out. I will make a DLL which you can import in your solution. Then if you want you can even make a GUI around it and just call the appropriate functions.
      @chatthusrilanka, if needed by the contest holder I can manage to make a parameter which excepts a array of the changing bits. Then he can choose himself to change whatever he wants. But then again, the implementation I had imagined would not just swap a few bits, but a whole lot of them to change the complete structure.

      • 10 anos atrás
    2. chathusrilanka
      chathusrilanka
      • 10 anos atrás

      @BETA911 : My argument is something like this. Say your file is 100KB in size. Let's logically break the file into chunks of 10KB. In other words now you have 10 file chunks.

      Now you execute your algorithm on top of this file. And suppose the swapping process changed the bits in 8 chunks but not the other two. In such cases the file recovery utilities can recover data from those two chunks. Especially metadata of file may be retrieved plus perhaps some text from some slides.

      To avoid that, you have to change the bits as much as possible. But still smaller chunks exist, so the data is vulnerable. Theoretically you need to change every bit of the file to avoid retrieval of data but the overhead would be high. And you will end up with complicated encrypt/decrypt methods with huge maps.

      • 10 anos atrás
  • amrosamaeg
    Proprietário do Concurso
    • 10 anos atrás

    Dear All,
    Can any one open this file??
    https://dl.dropboxusercontent.com/u/22964678/Text_Header_Template.pptx

    looking forward for your replies All
    *specially Mr. BETA911

    if anyone was able to open it please give me info about it like how many slides and what is the title of last slide and the title of slide #3 please

    • 10 anos atrás
  • mo3tazahmad
    mo3tazahmad
    • 10 anos atrás

    Please let me know if you like my idea, to start working on it
    and if you have any questions to clarify any thing please ask...

    • 10 anos atrás
    1. amrosamaeg
      Proprietário do Concurso
      • 10 anos atrás

      so what if my client run the application then force close it ??
      >>and the pp files will be used and not available while the app running<< How?? you said that the application will extract the files while the app is running so anyone can access the files while the app. is running or what ??

      • 10 anos atrás
    2. mo3tazahmad
      mo3tazahmad
      • 10 anos atrás

      I meant by not available that not available for copy or move or edit
      but you can preview the pp file by the software and don't allow modification only view... it's an idea....

      • 10 anos atrás
  • chathusrilanka
    chathusrilanka
    • 10 anos atrás

    What do you think about my solution? :)

    • 10 anos atrás
    1. chathusrilanka
      chathusrilanka
      • 10 anos atrás

      Added more info inside Entry 7

      • 10 anos atrás
  • gybersantos
    gybersantos
    • 10 anos atrás

    Let me know if you have question on my entry. I'll be glad to help.

    • 10 anos atrás
    1. amrosamaeg
      Proprietário do Concurso
      • 10 anos atrás

      So it's not practical solution, as my clients must stay able to open other presentations normally !!

      • 10 anos atrás
    2. gybersantos
      gybersantos
      • 10 anos atrás

      i'm sorry, i misunderstood your question lately. no the process will not close it. as long as the presentation is opened within your application, it should work fine.

      • 10 anos atrás
  • alliaunce
    alliaunce
    • 10 anos atrás

    Let me know if my idea works for you

    • 10 anos atrás
    1. amrosamaeg
      Proprietário do Concurso
      • 10 anos atrás

      Thank you for your entry, Okay I want to test your solution so please provide the instruction to embed my powerPoint files in my exe, and also let me know if this can be done by some code,
      Regards,

      • 10 anos atrás
    2. alliaunce
      alliaunce
      • 10 anos atrás

      add the pptx as new item in your project. change the content type of the file (in properties ) to embedded resorce. then u have to include the code of the screen shot to download and launch the pptx.

      • 10 anos atrás

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