I have an pdf file, encrypted with a certificate. I want to access to it in order to create a decrypted copy.I have the certificate stored at personal windows certificate store. Is it possible to use this one? How can I access with the pdfReader object?
View 1 RepliesI am attempting to find some code to use in VB.NET to decrypt a string that has been encrypted using the Java crypto libary.All of the code I have found so far uses an Initialisation Vector and Key to decrypt but the string has been encrypted using the Key only. (Using an Initialisation Vector is apperently an optional step in Java).Does anyone know of code that I can use (preferably in VB.NET but i could convert C#) to decrypt AES 128 Bit encoded string without an Initialisation Vector?
View 1 RepliesI have both Visual Basic 2005 and recently downloaded Visual Web Developer 2008 (Express Edition). In VB 2005 I cannot work on my website without reveiling my password (no encryption). This is also true with the Web Debeloper 2008 and it seems it will only work on sites Created with FrontPage. So my question is what do I need to upgrade to in order to work on my site without reveiling my password (encrypted access) or working in FrontPage.
View 13 RepliesI create a database like this:
Sub Main()
Dim wrkDefault As Workspace
Dim dbE As DBEngine
[code].....
I'm trying to write a Windows Application with VB 2008 that needs to use some simple Access DB (via OleDB connections). I did it and it works fine, but what I want to do is to have the databases not accessible to the users... I want the databases to travel togheter with the application, or to be embedded, encapsulated in it, but don't want that the user can open and read the .mdb files... I suppose that the way to do what I need is to set the "Build Action" property of the mdb files in the VB project to "Compile" or to "Embedded Resources" (currently it is set to "Content"), but when I try to do it, the application cannot finde the mdb file and cannot connect the database... obviously...I suppose I need to modify the connection strings, but I don't know how to do it!
View 2 RepliesI would like to know how I could encrypt the url and store the encrypted value in the dll?
And I would also like to decrypt it from the dll when I need it for later?
i am trying to decrypt a file that was encrypted with Des. However not all of the file is encrypted just a few lines are. Here is an example of the file im trying to decrypt:
Random text
Encrypted Text
MD5 Hash
Encryption Key(Only there for tests)
Number of encrypted lines
The idea is to read the last three lines into variables and use them to decrypt the text. At the moment i use the number of lines - (the number of encrypted lines + 3) to find where the encrypted text starts. Then i was trying to copy the encrypted text to a temp file so i could run the code bellow on it, however i am getting an encoding error apparently i need to be using base64 or something. So my question is can anybody explain to me or show me how i can pull the encrypted text out of the file so that i can use the code bellow on it.
Dim DES As New DESCryptoServiceProvider()
'A 64-bit key and an IV are required for this provider.
'Set the secret key for the DES algorithm.
[Code].....
i will like to know if it will be possible to decrypt and encrypted file in vb.net or any without knowing the form of encryption..any information on how to go by it... in that if you lose the form on encryption can it be decrypted?
View 1 RepliesI've created a console VB.Net application and encrypted the app.config file with RSAProtectedConfigurationProvider.I've used an article http:www.codeproje...eAppConfig.aspx as an example for the Encryption. It works fine in an IDE on my XP desktop.Then I deployed my application to a Windows 2003 server. The package included the app's executable along with the encrypted app.exe.config file. However, the application failed on the server with the following exception:Unhandled Exception: System.Configuration.ConfigurationerrorsException: Failed to decrypt using provider 'RsaProtectedConfigurationProvider'. Error message from the provider: The RSA key container could not be opened.I decided to encrypt app.config on the server so I copied app.config and encrypted it. The app.exe.config looked encrypted and I ran the application. However, it failed: although it didn't raise an Rsa exception as before,
[Code]...
i have an encryption code which i have created in C i want to use this code while a button is pressed so that the data gets encrypted how to do this?
View 1 RepliesI'm using this function to encrypt data but how do I decrypt it?
Public Function GenerateHash(ByVal SourceText As String) As String
[code...]
In login control ,is user can login with their encrypted password?
View 4 RepliesI'm wondering with My.Settings, where abouts my program saves them, and if they are very secure or not, encrypted etc..?
View 2 RepliesI have a text like :
Code:
aHR0cDovL3d3dy5kZXNpY2xpeC5jb20=AAAAAAAZGVzaWNsaXguY29t
aHR0cDovL3d3dy5zYW5kcmFjbGlja3MuY29tAAAAAAAd3d3LnNhbmRyYWNsaWNrcy5jb20v
aHR0cHM6Ly93d3cuYnV4b3V0LmNvbQ==AAAAAAAd3d3LmJ1eG91dC5jb20=
aHR0cDovL3d3dy5vc29jbGljay5jb20=AAAAAAAT3NvQ2xpY2s=
And I want.. an example... These strings are encrypted (excepting AAAAAA). I want to call Decode (string) for:
Code:
aHR0cDovL3d3dy5kZXNpY2xpeC5jb20=AAAAAAAZGVzaWNsaXguY29t
aHR0cDovL3d3dy5zYW5kcmFjbGlja3MuY29tAAAAAAAd3d3LnNhbmRyYWNsaWNrcy5jb20v
aHR0cHM6Ly93d3cuYnV4b3V0LmNvbQ==AAAAAAAd3d3LmJ1eG91dC5jb20=
aHR0cDovL3d3dy5vc29jbGljay5jb20=AAAAAAAT3NvQ2xpY2s=
And insert it into this code:
HTML Code:
:idea: [url=VALUE AFTER AAAAAA]VALUE BEFORE AAAAAA[/url]
I know that this not HTML...
I am using the method described in the following LINK and I am using the following code to encrypt:
'Page1.aspx
Protected Sub butEncrypt_Click(sender As Object, e As EventArgs) Handles butEncrypt.Click
Dim QueryString As String = "type=Int&pk=" & _primaryKey
QueryString = Tools.encryptQueryString(QueryString)
Response.Redirect(/SearchResults.aspx?Val=" & QueryString)
End Sub
and then finally de-encrypt:
[Code]...
How can I decrypt a file encrypted in vb.net? Is there a possibility here?
View 2 RepliesI want to get input data from user and encrypt them and save to database. Is it possible to retrieve this encrypted data and show in DataGrid?
View 3 RepliesI have a text box that accepts an 8 digit hex encrypted string and adds it to a listbox1. Then I have a button that when clicked takes the string from listbox1 and
1) reverses the string
2) subtracts 235
3) Converts it back to a 9 digit number
4) Adds it to listbox2 using the code:
Code:
Private Sub decrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles decrypt.Click
[code]...
However something seems to be wrong because it get an arithmetic overflow exception. Does anyone know what happens to be wrong with my code?
As we pass data to a database in a clear cut way, there may be situations, when we might fear data stealing. So can we simply encrypt data at the time of insertion, so that the data privacy will be maintained and the front end can only see the data.
View 1 RepliesI am using streamreader to read a file that is encrypted using PGP netshare. The file opens fine on my PC and i can read the file using Streamreader when it is unencrypted, but when i add it to an encrypted folder, I get back gibberish when the file is read. Below is a snipit of code, but i feel as though this may not be the problem.
[Code]...
Working in VB in VS 2008 I'm trying to read from an Excel file using Oledb. I have no problem with it when the file is not encrypted, but the client has set a password on the working copy.
I read elsewhere that it's not possible to read an encrypted Excel file this way, but I find that hard to believe.
I have been using RSACryptoServiceProvider and was using the template code provided from the MSDN resource page.url...I wanted to encrypt the data on my computer and transfer the data to the FTP server and have it decrypted there. I have the encryption and decryption code but it is in the same program and only work during the instance it is open. The intention is to have a program that will encrypt and send the data to the FTP Server. There will also be a VB Script on the server to decrypt the data and store it in a separate location. How do I get it to store the public key on my computer and the private key on the server? Also, how to I transfer the encrypted data over to the FTP and have it saved there?The purpose of this project is that we have people located over the globe and are sending sensitive information to an FTP server at the home office. My boss has insisted on the data being encrypted before sending anything. But, on the server it will be decrypted so that a select few can go through the information.
View 2 RepliesBefore storing information into the database I encrypt strings. It's the problem, is it possible to generate and show these encrypted data in CrystalReporter? (I want to show decrypted data)
View 5 RepliesI need to be able to accept a password from a user in a WPF app, encrypt it then store this in a database and be able to decrypt later on. However I'm not sure how to implement this.
This is completely trivial so whether it's safe or not doesn't matter. All I need is for it to get working only I'm unsure exactly how to do it. I've tried playing around with the DESCryptoServiceProvider() but haven't gotten anywhere.
To be clear, how exactly do I go about converting a simple password into something that's been encrypted and storing it in the database (and what fields would I store it in). At this point, I'm happy if there's only one key and that key is being defined in the source code.
What's the simplest way to upgrade a VB.NET site to using encrypted passwords? Are there easy to use encryption algorithms built in to System.UI?My site is using plain text password storage, and it will soon be going to a public server at godaddy from a private one on the local network. I'm going to have to start adding in encryption algorithms to all the password parsing functions, and it would be nice if I could just set a SALT key in the web.config file and Encrypt(password) or something like that.
View 2 RepliesI've been receiving pdf files that I have been processing with the PDFsharp libraries. These files where 128-bit RC4 encrypted. Now I getting files that are 128-bit AES encyption.
I'm getting this exception "The PDF document is protected with an encryption not supported by PDFsharp."
Is AES just not supported, or do I need to change the method in which I open the file? [code]...
i came up to create my own because i need to encrypt 10character string and i want it to output also 10character string..security is not my concerned here..what i want is encrypted string is not readable by the user or is not obvious to user.. is this possible by the use of Xor method?..BTW,its better if the output is alphanumeric.
View 3 RepliesConnection strings can stored in encrypted form in configuration file.
But some one can easily use the "UnprotectSection" method to decrypt the connection strings
I don't know how does this thing make it secure.
I am currently adding my friend's SQL Server into my Application everything works fine, apart from his password table encrypts so the login form only works when you enter the encypted password in. Is they anyway i can make the password field to de-crypt a password code.
[Code]...
I have an application which saves contacts from Outlook/Csv onto a disk, from a Treeview. Now I want to provide security for this file. I want to provide encryption using AES algorithm to the file before it is saved on the disk. My problem here is how I encrypt it before saving the contents from the treeview into the file on the disk. Also I want to decrypt the file contents and load treeview if i find the file is encrypted.
View 3 Replies