Encrypting And Decrypting A Text?
Dec 11, 2009There 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 Replies
ADVERTISEMENT
Encrypting/Decrypting From A Text File?
Sep 13, 2011I 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
Encrypting/Decrypting An Image?
Nov 22, 2011Im 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]...
Encrypting/Decrypting Files With Basic?
Jul 12, 2011I'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.
View 5 RepliesVS 2010 Encrypting And Decrypting An Executable?
May 13, 2012I'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
[code].....
VS 2008 Text Not 'decrypting'
Mar 31, 2009i'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 RepliesVS 2010 Decrypting (text) File Failure?
Sep 6, 2010Trying 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].....
Encrypting A Text In .net?
Mar 29, 2010I am new to .net classes and i would like to know how can i encrypt a text with AES256 algorithm.
View 3 RepliesVS 2008 Encrypting Text In A Text File?
Jul 3, 2009I recently made a program that will automatically log in a site and start a game. I have it so that you can save the Username and Password to a text file. I need the text file to be encrypted though, and then decrypted when you load it back up.
View 14 RepliesAsp.net - Decrypting ASPNET_Membership Password?
Mar 8, 2012Let'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 RepliesSelf Decrypting Email Attachment?
Sep 29, 2011I 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 RepliesVS 2008 Decrypting Vbulletin MD5?
Apr 5, 2009I 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?
Occasional Bad Data Error When Decrypting
Feb 2, 2011[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 RepliesDecrypting And Checking RegistryKey Value On Form Startup
Aug 16, 2011I 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 RepliesC# - .NET Options For Decrypting A Password In Project .setting File?
Nov 15, 2010In 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 RepliesMake Some Simple Program For Encrypt / Decrypting Message Using VB?
Jun 29, 2010i 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
Encrypting Data With RSA In .NET
Apr 8, 2012I have a DER file with sha1RSA as the Signature Algorithm. I have to encrypt some data using it.Can anyone tell me how do I load the DER file and use the RSA public key in it to encrypt my data in .NET?
View 1 RepliesC# - Encrypting A Private Key With BouncyCastle?
May 19, 2012I'm using the .NET version of BouncyCastle, and I have to save a private RSA key to file, obviously encrypted with a password for security reasons.What I'm trying right now is this:
Dim rand As New SecureRandom
Dim arr As Byte() = New Byte(7) {}
rand.NextBytes(arr)
[code].....
But BouncyCastle is thwrowing a NullReferenceException on the last instruction. Since the method is totally undocumented >:( I wonder if any of you know how to use it correctly...
C# - How To Stop Asp.net Encrypting The Querystring
May 11, 2011I have a requirement where I have to pass some values into the next page via querystring.This querystring is coming from third party and they need to have it on the otherpage for some analysis. I just do a response.redirect and add the querystring that i recieve from them to the other page. My problem is that the .net environment is encoding/encrypting some of the special characters used by them which I dont want as it does not bring back the correct values in the new page.
[Code]...
Encrypting And Decryption A File
Sep 20, 2011I am actually really new to VB and C#. From numerous tutorials that i found online i was able to create a small program that will encrypt a file. However I am having a really hard time decrying it back.[code]All I am trying to do is to create a program that will decrypte these file with an upload button. Our system encrypts the files to prevent operators from changing the results, we need to trend the data. However it will take way to long to use the online tool provided with the software. A desktop tool will save us much more time. The files generated are 70mb and up.
View 15 RepliesEncrypting File Using AES 128 And Securestring?
Oct 24, 2009Im trying to create an encrypted file using a secure string and the AES128bit managed class to encrypt some data to a file.I have read many variations on the forums on how to do this but everyone seems to do it slightly differently. Ive created the below function and just wanted to confirm that this is the correct way to go about it.
[Code]...
Encrypting Strings With SHA1?
Jul 18, 2009how to encrypting strings with SHA1, but all of the code I have found does not work or it is to complex for my program. I have found a website that has a encrypting demo program. It worked well so I email the programmer and he gave me this code.
[Code]...
Encrypting Texts With Password?
Feb 26, 2012I heared about an encrypting function that encrypt the texts with a password I don't know exactly how it
View 6 RepliesSerialization And Encrypting Files?
Jan 15, 2010what 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]....
VS 2008 Encrypting .pdf Files
Aug 9, 2009how 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 Replies.net - Encrypting Multiple Elements Of One Xml Document?
Aug 25, 2010I managed encrypting an xml document by encrypting an element and then replacing the element with the encrypted data. A shown in the sample code below. Public Shared Sub Encrypt(ByVal textReader As TextReader, ByVal textWriter As TextWriter, ByVal certificateName As String)
[Code]...
Asp.net - Encrypting Parameters Of A Querystring Via Javascript
Feb 23, 2012I want to redirect to some page with querystring,and the querystring value should be in encrypted format and i want to decrypt that in codebehind
example:
function redirect(s, e) { window.location.href = "Default2.aspx?Id=" + encrypt(5)+ "&No=" +encrypt( 5);}
and in codebehind:
Dim id As String = Request.QueryString("Id").ToString()
id = Decode(id)
Dim no As String = Request.QueryString("No").ToString()
no= Decode(no)
Encrypting Configuration File Using RSAProtectedConfigurationProvider?
Mar 6, 2009I finally managed to encrypt the user settings in my app.config with the following
[code].....
Encrypting Data Using A Binary Formatter
Aug 20, 2009I am currently using a binary formatter to serialize/deserialize some data objects. Some of the properties in the classes are Strings. When the data is written you can open the file with a text editor and can see the raw String data. Is there any way to encrypt the Strings or the entire object before it is serialized? I have looked at this thread here [URL] but the code is in C# and the free converters I tried for some reason did not like the code. This is the code I am using currently.
[Code]...
Encrypting Sensitive Info In Program?
Oct 9, 2009I was wondering, i have smtp mail adress and password (for gmail*) and it is probably very easy to read it when opened with hex editor or decompiled so i want to encode/crypt that info in my program to make it almost (i know it isnt possible to make it fully unreadable) unreadable and/or make my program undecompilable
View 8 Replies