I'm writing a program in Basic where users can select a File using OpenFileDialog, then using a Dialog with two textboxes as the way to set the password to encrypt a file. I'm having trouble getting the program to require the password to open the file.
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There are many algorithms for encryption in internet. But i found them more complex. I want simple and powerful algorithm for encryption and decrytion of text.
View 13 RepliesIm a Uni student and im having probs with encrypting an image and also the contents of a folder. I have successfully encrypted and decrypted a text file using the following code below.
If anyone could take a look and advise on how to alter my code to perform the task of selecting an image or folder and encrypting it and decrypting it via a secret key that you input within a textbox,
[Code]...
I have a program and I want to make it so you need a specific key to use it. I want to store keys in a text file and also use encrypt strings from my program to a text file.
I'm using Visual Studio 2010 Ultimate and programming in Visual Basic
I've been messing around with cryptography lately and wanted to figure a way to encrypt an exe so it's not runnable then decrypt it back to it's original state. I found a tutorial online that teaches how to do this with a text file so I figured I'd just tinker with that and try converting it for use with executables. For some reason though after I decrypt the encrypted version it doesn't run and gives me the error:^I'm running 64 bit windows but I'm pretty sure this wouldn't work on an x86 system either.
Imports System
Imports System.IO
Imports System.Security
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what the relation between Serialization and encrypting files, i wanna know that and i wanna a lessons for serialization and i want to ask about this code in VB6 if we can convert it to VB.net 2008
Dim a As String * 10
Dim b As String * 10
Dim c As String * 10
[code]....
how I can encrypt .pdf files? I haven't been able to find something that will give me an idea of how to do it.
View 4 Repliesi would like to encrypt my data files, which are serialized object files. is there a simple way to do this that will work trouble free on both windows xp and vista?
my environment: windows xp pro (sp3), visual studio 2008 pro, (sp1, sdk 1.1)
I have a folder. With folders. With files (mainly .pngs).
For learning purposes, I am trying to create an application that will take that folder and "compile" it in one single data file. Like a .bin. The point is, the user can't see or edit the images... easily.
And in the future, my application can open such data file and read the folder's contents, and also display the images found within the folder (using Image.fromFile("pathForTheFile") or something like that).
Is that possible? Is it possible to "encrypt" or "compile" folders/images or even audio into one file and re-read it in a future using VB.NET?
Let's say a create a new project consisting of form1, sized at 400x400.I add a datagridview box of say 350x350 in size.Now that looks fine when the program is run. Except if the user increases the size of the window - or even worse maximises the window on a high res screen. Now my lovely 350x350 datagridview box looks silly on the huge empty background.Is there a way to set the datagridview box to increase in size automatically as the window grows?
View 2 RepliesI downloaded AxCrypt and encrypted a pdf file. It creates an executable that self decrypts the file if the correct password is entered. This is what I need except that I have to email this self decrypting file - and we all know that exe files get blocked. Are there any self decrypting methods out there that do not use an executable file?
View 5 RepliesI am trying to setup so a user can subscribe to my forums. When he/she does so, it puts them in the nec. group on the forum. This is all easy. Note: I am the owner of the site and the mysql db. So this isnt to decrypt them on other sites.
In short, all of my software will require a login / password to use the programs.
Now, on the mysql, the db encrypts the passwords. How would I go about decrypting it? I read somewhere that its a one way encryption. If this is the case, how does the site know if the password is right or wrong if it cant decrypt it?
i'm making instead of having the game save as regular text i wanted to mix it up a little. So, i took a bunch of special characters and assigned letters - A-Z and numbers 0-9 - some special characters per character. Anyway, when i 'encrypt'(not really encrypt) the text it works fine. But when i go to change it back.. that's where nothing happens.[code]The code for when i change the regular text into special characters is the same thing except backwards.I would rather not post the project since it's part of an even bigger project.
View 8 Replies[Code] Here _data is a string containing the encrypted value. m_transformDec is the Decryptor created previously. Usually this works. Occasionally, I get a "bad data" error. I print out the value of _data, and it is always the same. The code is multi-threaded, which I suspect is the reason for both the problem, and it being hard to reproduce. The decryptor is created in the creation of the class, and the decryption is done in a Shared function, but I don't see anything there which is not thread-safe. Any ideas?
View 1 Repliesi want to know how to compile my basic programs to (.dll) files i want to do that to save my code i want that with all ways to do that.iam using vb 2005.net
View 3 RepliesI have encrypted a user inputted value and successfully stored it in the Windows Registry. Now I am having problems Decrypting that RegistryKey when my Form starts up and making sure it is the same key that was originally stored. My decrypting code has been working but if I go inside the Registry and add an extra character on to that keys value, my program is still running.. It is not supposed to run if that RegistryKey is not the one that was originally user inputted..[code]And I also have tried A LOT of other examples, but I am not going too post them all. So is there anyway I can check if a RegistryKey exists and Decrypt it to make sure that it has not been changed on my programs startup?
View 9 RepliesTrying to decrypt a textfile is giving me an error: The input is not a valid Base 64-string as it contains a non-Base 64 character, more then two padding characters, or a non-white space character among the padding characters.Besides that I also get an exception while debugging: A first chance exception of type 'System.FormatException' occurred in Fenix.exe When I start the app it opens the file and tries to decrypt it. After decryption the string is send to a label, so I can read it. The codes I used:
vb.net
' encrypt the file Private Function Encrypt(ByVal strText As String, ByVal strEncrKey As String) As String Dim IV() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF} Try Dim bykey() As Byte = System.Text.Encoding.UTF8.GetBytes(strEncrKey) Dim InputByteArray() As Byte = System.Text.Encoding.UTF8.GetBytes(strText)
[code].....
I wrote a programme about 12 years ago in visual basic 3.Since then I have moved interstate and changed jobs quite a few time and lost the original Visual Basic 3 discs.Visual Basic 3 saved the files in a binary format that has not been used in any other version of Visual Basic. So now I cannot read or modify the files.
View 3 RepliesI would like to iterate the files in a folder in Visual Basic. I want to check for each file's name. I heard about a Dir function or something, but I am not very sure how to use it..
View 1 RepliesFor instance, I would like to read the picture's dimensions (width, height) and modify them to fit space available on a page. I have many pictures, so don't want to do this by hand.
If this involves using components or objects, where to find useful documentation about properties, methods, or whatever I need in order to write a program.
I'm using Vis Basic 2010 Express in Vista Ultimate.
I am making a desktop cleaner and I want the program to search For files extensions and move them into a new folder each named after the extension name. Here is what I have.
Public Class Form2
Private Sub Form_Load()
End Sub
[Code]...
I want to use Kill(Me.FileReference.Text("*.txt")) to move the files with .txt extention in the Directory which the textbox named Filereference.text contains which is extracted using MyFolderBrowser.SelectedPath.
Me Again, Can anyone tell me how to go about using Visual Basic 2010, on getting file information off of My CD'S/DVD'S as I have Many of them with No titles written on them.basically i would like to insert a CD or DVD into my computer and when i click a Button, A textBox will have all the files from the CD or DVD. and then i could print the list and keep a record of my CD/DVD.
View 8 RepliesHow do I run files/application with standard editor/viewer?
View 1 RepliesIn VB, i see file format in wav, but how we can run other formats through vb code my.computer.audio take wav format is there any other posibility
View 5 RepliesI have this
[code]...
Still it shows the message box, this shouldn't be the case and is a tested and proofed situation, in this case it didn't, what am I doing wrong here?
Kind Regards, Starf0x
I am trying to locate the runtime install for Visual Basic 6 Runtime Extended Files. I am not a developer just the guy truing to get it onto the systems for them. My question is simple anI hope the answer is the same. We are converting our systemsfrom Windows XP to Windows 7 and we need the extended runtime modules so a number of our applications will actually work.
I cannot locate the install for this in the Visual Studio download area. Is the re-distributable part of the studio install (so it should be on one of the developers systems) or do I download it from somewhere else.
What files do I need to include when I share my published VB form. I see in the "Application Files" folder there are all my version that I have published. Do I need to include all these or just the most resent with the Setup.exe?
View 1 RepliesIn the UI of my winForm I ask the user for a user name and password. I store this password as text in the Settings (the .settings file) of my project. The app is a visual Studio Add-in How can I encrypt and decrypt the password before and after I enter it into the Settings file? I don't really need anything fancy. It's just a little in-house app. But I'd like to know all my options
View 3 Repliesi want to make some simple program for encrypt / decrypting message using VB, my problem was when i want to decrypt the message, the result was incorrect,
Code:
Dim decryptor As Integer = TextBoxhasilencrypt.Text
Dim privatekey As Integer = Labelprivatekey.Text
Dim modulus As Integer = LabelModulus.Text
[code]....
the logic error on the program was when the "power of" are odd
I'm trying to convert an old Quick BASIC program to VB.Net. There doesn't appear to be any direct replacement for the old file statements. Building a database seems like overkill for my simple needs.
How can I do the following in VB.Net?
OPEN "test.dat" FOR RANDOM AS #1 LEN = 20
FIELD #1, 10 AS a$, 10 AS b$
LSET a$ = "One"
LSET b$ = "Two"
PUT #1, 1
GET #1, 1
PRINT a$, b$
CLOSE #1
