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 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've added an attribute for a user readable display name to my Enum values.However my code to convert from the user readable display name back to the Enum (function ToEnum) seems very convoluted.I am wondering if I am missing a better way of doing this (I am using Visual Studio 2010 with SP1.) [code]
View 10 RepliesGreetings, I'm looking for a way to encode a string into HTML that uses human-readable tags such as ê (=ê). At the moment, I am using the HttpUtility.HtmlEncode() function, but it appears to return numbered tags instead of human-readable ones. For example:
Dim str as string = HttpUtility;HtmlEncode("vente - en-tête")
'Expected: vente - en-tête
'Actually received: vente - en-tête
Is there a setting or function in ASP.Net to encode a string into HTML resembling the first comment?
EDIT: I am looking for this kind of functionality because the text is saved HTML-encoded in the database. The text comes from a bunch of MS Word documents that have been converted to 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]...
I 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?
Connection 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 use AES encryption in my vb.net 2008 windows forms apps to ....
1. Store user passwords in sql server express database in encrypted form
2. decrypt the encrypted Sql server express connection string password on the fly when connecting to SQl Server over a vpn or direct to web based sql server database
3. decrypt the encrypted ftp site password on the fly when my application connects to my ftp site to upload client's database backups
The issue I have is that the secret key for the encryption / decryption is hard coded within the encryption/decryption functions. So anybody who decompiled my application would be able to generate the same encryption, as they would have the encryption secret key How can you hide the encryption secret key so that if anybody decompiled my app they could not reproduce the decryption function
I'm working on a way to authenticate users in my app, and what I've come up with is the following method.To write to a database, the user must have an account in SQL server 2008. However, I still want people to be able to view the application if they don't have access, but only read, they can't sync any changes. This is working well, as I have a string array hard coded containing approved users:
Dim Users() As String = {"BWANG", "EDASALLA", "ERICHARDSON", "HALONZO", "JCHAPMAN", "SKIM", "PMACK"}
The one problem with hardcoding is that if I need to ever add a user later on, I'd have to release an update to the program. (which isn't hard as I already have updating built into the app, and users can still download updates even if they can't sync.)
What I'd like to do, is use an encrypted .dat file that contains the user names, and store that with the application, so that i could always be added to, and only one file would need to be downloaded.
I have code in place to encrpt and decrypt the .dat file (called users.dat) and this code works for single text entries in the file. I need to figure out how to load a list however into the array in place.
Imports System
Imports System.IO
Dim userfile as String = "C:users.dat"
Dim Users() As String = Data.Decrypt(File.ReadAllLines(path))
Basically each line in the file will have an encrypted user name, and i want it to decrypt each line and store it back into that authorized user list.
I 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
Private Sub decrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles decrypt.Click
Dim i As Integer
Dim buffer As String = ListBox1.Items(i)[code].....
However something seems to be wrong because it get an arithmetic overflow exception.
Hey guys, I am trying to send data from client to server (encrypted) and the string sent from the client is not the same as recieved from the server. I've been killing my brain for hours to get this to work but I cant manage. Im converting everything to Base64 string.
Client:
Public Sub SendMessage(ByVal msg As String)
Try
SyncLock myclient.GetStream
sw = New IO.StreamWriter(myclient.GetStream)
[code]....
Is there any way to take an xml string in .net and make it easyer to read? what i mean is can i convert this:
[Code]...
is there any built in class for this? as sql server 2005 seems to remove all formatting on xml to save space or some thing...
I downloaded a database from url... it was a zip archive. Anyway my question is, there are two files: virussignatures.dat and virussignatures.fmt. I've heard that I should extract the database as SQL by using BCP. The contents of virussignatures.fmt is: [code] I want to turn the virus signatures.dat to an XML or an understandable TXT.
View 1 RepliesVariable readable from all forms?
View 14 RepliesI have ASN.1 format files. I have to convert into CSV(comma separated) format also readable one. Tell me the shortest way... Like Decoders etc.
View 1 RepliesIs There Any Possible Way To Convert Bytes To Readable text?
View 6 RepliesI am having trouble converting the Bytes() to a readable text.
I will be receiving packets from a UDP Connection, but due to lack of connectivity issues, they have provided me a .mem file that i am assuming is the whole stream of the packet.
So for now, i am trying to read the file and i get a collection of bytes(). but i cannot convert it to readable text.
i have been working on VS 2008 for past 6 months and right now i am working on some little project which requires the value in reg_binary in XP to be decoded to readable string of the original form
View 2 RepliesHow do I turn this:
20101028094024.500000+060
into a readable date and time.
I have a Socket application that, when data is received (on the Server side) and the client is recognized, the data is passed onto its own socket and stream, and the previous socket and stream is discarded.
The data is serialized with a binary formatter before sending and deserialized on receiving the data.
[Code]...
In developing a flash-based memory manager, I need to be able to view large quantities of data. With my eyes and monitor resolution, I can read hand-drawn 3x5 letters on a 4x6 matrix without too much difficulty, but none of the system TrueType fonts render optimally at that size. I've tried writing code to draw font shapes to off-screen bitmaps, and then use DrawImage to copy those bitmaps to the screen, but I can't get good performance. This is for development, not production, so performance doesn't have to be absolutely optimal, but I don't want to spend too long waiting for screens of data to refresh.
What would be the best way of either making .net display a font which is pixel-perfect what I want, or else building a bitmap out of lots of little pieces quickly? I'm using vb.net, so I can't simply generate a bitmap as a byte array and pass that to the Bitmap constructor unless someone can show me how to convert an array into an IntPtr.
I have a table with a column/field (type : nvarchar) that stores text. The text is read from a text file and written to the database using vb.net application.The text in the text file contains Turkish characters such as the u with 2 dots on top(in the future it will be in different languages )When I open the table, the text in the column is not readable.It converts the Turkish special character to some unreadable characters. Is there anyway to make the text readable in the table?
View 4 RepliesIs there anyway to store a string in the code of an application and not let it be readable by reflection? For example if I have:
Dim ServerAddress as String = "10.10.10.10"
Is there any way to make ServerAddress' content not readable.
Is it possible to use the streamWriter to read a .txt file thats in a web address online?
View 1 RepliesI was wondering which is the function / namespace I need to use in VS 2010 (using VB) to make a folder completely unaccesible (not even readable).
View 1 RepliesI am trying to pass to a "SendEmail" class that I created an attachment from a stream.Here is my stream from the form:
Private Sub button_Email_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles button_Email.Click
Dim myimagestream As MemoryStream = New MemoryStream()
myimage.Save(myimagestream, Drawing.Imaging.ImageFormat.Jpeg)
Dim se As New SendEmail
[Code] .....
All seems to go fine until I get the email and try to open the attachment. The file is not readable but it's not a zero byte file.
How can I convert a (unix) timestamp (which I get from a web service as integer) to a human readable date?
View 3 RepliesProblem: Your task is to take input from the user in string and give the following options to the user in a menu.
1- Find a String
2- Create sub-string
3- Erase a portion of a sting
4- Replace a word in the string
5- Count number of words and characters in the string without spaces.
6- Capitalize first character of each new sentence and convert the rest
of the characters to lower case.
7- Sort all the words in alphabetical order. (Use Bubble sort algorithm to perform sorting).
To perform all the above mentioned tasks you can only use pointers. Create a function to perform every task.
I 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].....