Code To Encrypt A File With PGP Keys?
Jan 12, 2012
I tried with the following code. It encrypted the file but after I FTP'd the file to my vendor he was not able to decrypt it.Then realized that this code is not using my PGP Keys to encrypt the file. It's creating a new key automatically. That's the reason my vendor is not able to decrypt the file. How can I encrypt the file using my PGP keys? So that my vendor can decrypt the file using same PGP keys.
' Encrypt textfile with Rijndael encryption
Public
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Sub Encrypt(ByVal[code].....
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Feb 28, 2011
I'm having trouble writing the code to encrypt a file->networkstream->Decrypt the file.. I've tried several ways, but I keep failing....
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Nov 12, 2009
i have found a few encrypt/decrypt tutorials online but either they dont work or they only work when the application is running so if i encrypt a string using some code i find and save it (in its encrypted form) and then restart the application and enter the saved encrypted string into a textbox and run the decrypt code it wont decrypt it. i don't understand why en/de-cryption is so hard or why there are so little working examples online. could someone be so kind and show me some code that can let me en/de-crypt a string even if i restart the application or use it on a different computer? and doesn't show the weak key errors all the time.
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Apr 4, 2011
I'm trying to make a updater for my program at first i tried putting a password on the files folder then users can download the new zip file when its updated but when they first time install it wont have the password on it so i then decided not to use a password and am wondering how would i encrypt a line of code in the program? its the line that contains the database info so obviously i don't want my users to see that.
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Jun 16, 2009
I have forgotten the right procedure to encrypt the VB2008 code with dotfuscator community edition, may you explain the way to use it (the dotfuscator) step by step?
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Jun 23, 2011
I'm wanting to encrypt some data (hopefully under five hundred bytes' worth) and store it in a QR code. Originally I wanted to use RSA, so the data would be signed with User A's private key and User B's public key, but unfortunately, VB.NET doesn't like encrypting that much data. I've read that I should use Rjindael to encrypt the actual data, and then use RSA to encrypt the key used by Rjindael. However, I'm not having much luck being able to search the web for some kind of tutorial or something.
Also, if I was wanting to store this on a QR code, wouldn't I have to store both the encrypted data and the encrypted key used by Rjindael? Do you think this would all fit? I may be able to use version 40 on medium error correction [URl].. it stores 18,672 "data bits"), but I would prefer to use a lower version (that is, smaller) if at all possible.Generating the QR code won't be the problem (I know there's a .NET library for that), I'm just curious about getting the data encrypted to begin with.
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Jul 23, 2009
encrypt the string values stored in the code.The problem is that when the code is compiled and the .exe file is generated, anybody can edit the .exe file with an text editor or another program and see the values.This is very important for me, because i have some password stored in string variables?
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Oct 21, 2008
I have a problem detecting whether one of the arrow keys is pressed, all the other keys seem to be detected apart from the arrow keys??? I have set key preview to True........ It detects the arrrow keys BUT ONLY if I have NO other controls on the form??? example..
Me.Text = e.keycode
It works, but then if I add a button for example, it stops.
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Jun 21, 2010
I have the following code which works pretty fine with Listview. But I would like to use it with computer keyboard up/down arrow keys. How to modify the following code?
CODE:
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Jun 12, 2011
i am migrating vb6 to vb.net.the ini.file of vb6 has to be converted to app.config file, and we has to use this app.config in our code by removing ini file.how to create app.config for this inifile... please any one can respond quickly.
my inifile is like this ..
[Parms]
Language=English
[Enlish]
1=Product Library Copy
[code]....
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Mar 17, 2009
I would like to know if it is possible to be able to encrypt a file and have my application be able to decrypt it and ammed the file as necessary. and then when the program exits it will encrypt the file back up.
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Oct 16, 2009
I'm just getting started with Visual Basic .NET and I'm currently stuck on the following problem: how can I encrypt/decrypt a file with asymmetric encryption?
Essentially, I'm trying to figure out how I can write the following pseudocode in VB
[code]...
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Mar 12, 2010
Has anyone used these methods? I tried File.Encrypt on a text file, and I did not get an exception, however the Encrypt method did not work (the file was unchanged afterwards).
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Jun 22, 2011
I need some help on saving/reading xml from/to dataset. I would like to make that complete file is encrypted and not only some elements inside or part of file.Currently this is not working in any way at all.[code]
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Apr 14, 2010
So I have a connection string which is read from a basic text file. This string contains a password. Is there anyway to encrypt this text file so that anyone can't just open it up and read it. The program will still be able to read it.
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Feb 20, 2010
Is it possible to encrypt a file/folder in vb.net?
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Dec 23, 2011
I ended up getting this properly working, as far as encrypting a file goes:How to encrypt and decrypt a file by using Visual Basic .NET or Visual Basic 2005 However, the catch is I have to change the name of the output file. What I was hoping to do is overwrite the original with the encrypted file, but when I tried that on a large file, it ended up only getting about 8 bytes of it.
Does anybody have any suggestions or recommendations? The overall idea is that I want to keep a file encrypted until it needs to be unencrypted for use by a program, but I'm not sure if there are better tools out there or if there's a better way of accomplishing this.
Question 2: I would really, really like to encrypt an entire folder, which I'm guessing would be faster than file by file, but when I try I keep getting access denied errors, even with DOS Cipher. Is there a way to do this with a key?
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Apr 23, 2009
I made a program that encrypts data and puts it on a txt file. There are two parts of information that need to be "linked" to the other. Say its Person 1, then Person 1 gender, they need to be placed together. Each encrypted piece of seperated by a ";". I have it read the file and place the information on a Rich Text Box. How can I read all the encrypted info and stop at ";" then place that into a variable then read the next bit? I did this a while back but I used StreamReader/StreamWrite and can't remember how I did it. Right now it reads through the open file dialog and writes it to the Text Box with this command writetext.LoadFile(sFilePath, RichTextBoxStreamType.PlainText)
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Jan 6, 2010
How to encrypt or set a password for my AVI file with visual studio 2008?
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Feb 4, 2011
I have a page that has a few text boxes on it and are filled based upon a persons information. Like Name, telephone number, address etc
The data is stored in an Access DB.
I want to add a check box and have a label beside it that if it's checked it shows a hyperlink to a pdf file, if its not checked the link disappears, so toggle between the two.
Here's the check box I have so far, which isn't much:
<br><input type=checkbox name="Password" value="<%=oRs("Password")%>" size=40> Check to show PDF File: <a href="<%=oRs("Password")%>"><%=oRs("Password")%></a><br><br>
I need this hyperlink/ string to be encrypted based upon the persons name, so each person has its own pdf file and no one can just guess anothers pdf file and have access to it....
The pdf file will be stored in a virtual directory within the site.
I don't know Vb or asp, and I'm doing this all in notepad ++
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Oct 17, 2011
I need to encrypt vbs file using a cryptographic algorithm. I read about converting it into vbe file, but is there any other way to do it?
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Jul 14, 2010
I have the files in a listview control, with checkboxes. I would like it to encrypt all files ending with .rc4, that are listed in the listview. But keep the original of file extension
E.g : file.txt --> file_txt.rc4
How can I get it to encrypt multiple items. I already tried and still can't write in...
Here my code
Private Sub BtnEncrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnEncrypt.Click
Dim ByteConverter As Encoding = Encoding.UTF8
Dim Key As Byte() = ByteConverter.GetBytes(TextBox2.Text)
If ListView1.Items.Count <> 0 Then
[Code] .....
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Jun 24, 2010
I have written a POS application, and now i want to create different versions of it.omething like a basic version, a premium version and a Full version. So if a client pays more they get more features in the same application. Is it possible that i could keep one standard application but features in my application get enabled / disabled depending upon what license key user enters. Restrict parts of code that can be executed only if a certain key was entered.
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May 7, 2011
What is the best way to manually generate Primary Keys in Entity Framework 4.1 Code First?
I am programming ASP.NET MVC 3 and I use a repository pattern.
I currently generate keys in a sequential order by using the [code]....
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Jan 13, 2009
I have been successful in making an anti-hack program that uses a list from the local computer, this is at the moment a text file that can easily be modified, so my question is.Is there a way to replace this .txt file with a more secure format, one that cannot be decrypted (or is very hard to decrypt) without changing all my code?
the only thing i have to use the txt file for is adding the contained items to a listbox. Also, it would be possible for be to use SQL as i am using a dedicated server for the automatic update, so can use it as a remote library for the app the connect to.
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Oct 8, 2010
i am looking to decrypt my HEX code file for an ATTiny chip and programming it using the AVRDude command line interface. Problem being, i do not want the user to be able to see what the HEX file is at any given time.Can the VB.net Cryptography crypt the HEX file before i put it onto the server and then decrypt it after the program downloads it from the server and runs it through the program without seeing the decrypted HEX file?Obviously the HEX file can not stay encrypted while being programmed to the ATTiny chip so how can i go about it so that i can create the original HEX file to be programmed within the program without having to worry about it writing a temporary file to the hard drive and then deleting it afterwards? (Because they could close the program after it does that temp file and they would be able to navigate and open it and see the code)
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Oct 8, 2010
i am looking to decrypt my HEX code file for an ATTiny chip and programming it using the AVRDude command line interface. Problem being, i do not want the user to be able to see what the HEX file is at any given time.
Can the VB.net Cryptography crypt the HEX file before i put it onto the server and then decrypt it after the program downloads it from the server and runs it through the program without seeing the decrypted HEX file?
Obviously the HEX file can not stay encrypted while being programmed to the ATTiny chip so how can i go about it so that i can create the original HEX file to be programmed within the program without having to worry about it writing a temporary file to the hard drive and then deleting it afterwards? (Because they could close the program after it does that temp file and they would be able to navigate and open it and see the code)
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Oct 7, 2010
i am looking to decrypt my HEX code file for an ATTiny chip and programming it using the AVRDude command line interface. Problem being, i do not want the user to be able to see what the HEX file is at any given time.
Can the VB.net Cryptography crypt the HEX file before i put it onto the server and then decrypt it after the program downloads it from the server and runs it through the program without seeing the decrypted HEX file?
Obviously the HEX file can not stay encrypted while being programmed to the ATTiny chip so how can i go about it so that i can create the original HEX file to be programmed within the program without having to worry about it writing a temporary file to the hard drive and then deleting it afterwards? (Because they could close the program after it does that temp file and they would be able to navigate and open it and see the code)
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Aug 5, 2009
How can i encrypt or decrypt only a part of a file? I try, and i keep getting an error message that says that the stream might be corrupt. By the way, it is ok to convert the text to a byte array using the system.text.encoding.ascii.getbytes() right? The reason i want to encrypt/compress only a part of a file is because i don't want to encrypt or compress the file header. That way the program can gather info about whether the file is compressed or encrypted.
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Aug 11, 2009
what is the difference between DPAPI and file.encrypt (I/O)?
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