I am making a Gmail notification program that handles multiple accounts.The user will, obviously, have to input their authentication information for each email account so that the program can save it to login to Gmail with.
What is the best way to encrypt something like that since this information will have to be saved in their harddisk?
Is there a way to inerlock letters in a password. EX: lets say my password is 1234567password, is their a way to interlock or inject random letters/numbers /symbols/etc into the password? Ok so our password is = 1234567password is their a way to make it like this = g1i2h3h4q5d6g7rp4a7s;?s`w6o+r/d5
View 3 RepliesIn my database I have a column that contains the passwords, and I use the
View 3 RepliesI am using a network connection to my server where users are checked in the MySQL database for authentication, but I noticed even after I obfuscate the code you can still use a decompiler to read the password from within the code and other security details. How can I encrypt these?
View 6 RepliesI am making an activation server and the client will have to send infos to the activation server which send back the encrypted license file. However, in order to decrypt that file.. the client need the key or password.
What would be the best place to to put key or password used for encryption ? or else even better what would be the best way to transfer that key or password ?
i have created a VB.net application which can be used as a BO scheduler substitute for sending refreshed report copies. These copies are AES 256 encrypted and password protected.
View 2 RepliesI have set up a method in vb.net and in xcode for encrypting a string using as far as i can tell the same parameters for an AES encryption.I've looked all over the place but cannot find information on whether they use the same encryption algorithm and settings.
this is the vb.net code:
Dim encryptAES As New AesCryptoServiceProvider()
Dim encoding As New UTF8Encoding()
Dim encryptor As ICryptoTransform
encryptAES.Key = encoding.GetBytes("12345678901234567890123456789032")
encryptAES.IV = encoding.GetBytes("1234567890123416")
encryptAES.Mode = CipherMode.CBC
[Code]...
Quote:
Originally Posted by kleinma
Encryption would work fine, so long as it is symmetrical and done prior to storing the info in the setting, and decrypted after reading the setting back in.
The key or iv for the encryption (which is a series of bytes) could be generated from a user defined password, making it so the key used to decrypt is never stored even in the compiled application. Only providing the main password would provide the key to decrypt the data, limiting the attack surface to pretty much just brute force dictionary attacks.
I think that is probably a bit beyond the scope of this question though, he probably needs to start just saving and recalling data properly.
How would one go about doing this? I've read a little about encryption and I even have a demo program, I just don't understand the overall process of this. (I included the OP in the topic's title because it was his idea, and he might be able to explain it the best).
I want to try and use the new encryption algorithms provided with .NET 3.5. Any links or examples for how to use one of them to encrypt xml content?
As written on msdn site is:
The following algorithms are included:
Advanced Encryption Standard (AES) with key sizes of 128 and 256 bits for encryption.
Secure Hash Algorithm (SHA-256 and SHA-384) for hashing.
Elliptic Curve Digital Signature Algorithm (ECDSA) using curves of 256-bit and 384-bit prime moduli for signing. This algorithm is provided by the ECDsaCng class. It allows you to sign with a private key and verify with a public key.
Elliptic Curve Diffie-Hellman (ECDH) using curves of 256 and 384-bit prime moduli for key exchange/secret agreement. This algorithm is provided by the ECDiffieHellmanCng class.
Alright I am trying to make a little login system with encryption. I am trying to see if the user entered in there encryption key, if they did then they can input there account. Same thing with the password textbox. If they already entered in there encryption key then let them type in there password. I am trying to make it so if there text in encryption key then let them type in there account or if they didn't then let them put it in then let them type in there account.
Dim AccountInfo As String
Dim PasswordInfo As String
Dim EncryptionKey As String
'account textbox
[Code] .....
Im wanting to make my own alphabet for my encryption, ex:
[Code]...
Etc. What is the best way to do this and it make it as encryption?
I am currently working on a simple data encryption program in VB 2008 express. Basically, I want the user to be able to select any file type and the program will read the data and store it in a text box. The user would then input a key, push the encrypt button and the program would XOR each byte of data with each character from the key and store the data in the third text box. I have written a program that has similar functionality only, it will not read from files, it simply reads data from a text box, so I have a encryption algorithm that works.Here is my
[Code]...
I'm a complete beginner to programming alone, let alone VB.net. What I need to do is encrypt a block of text inputted by a user using a keyword that will also be inputted by the user. This is all to be done using ciphertext, so naturally the user would be informed the keyword can not have any repeating characters. I figure the English alphabet will be predefined in capitals and lowercase, then the keyword will be read character by character, removing those characters from the alphabet array and then appending them to the end of it (to create the new encrypted alphabet). How to read the keyword character by character, and then removing the corresponding letter from the alphabet. The best I can think is to check each character of the keyword against each character of the array which I'm sure is much more work than I need to do.
View 1 RepliesThis seems like it would be so simple and fast, but I cannot figure out how to accomplish it in VB since there aren't many bit functions. I want to take a file and append 5 junk bits at the beginning and 3 junk bits at the end. In essence, just add 1 byte to the file, but in the process offset all the current bits so the file is no longer readable.
I just need a very simple encryption/decryption, but it needs to be very fast as well. I try XORing the bytes, but it gets slow with just a 1MB file. Some of the files are going to be close to 10MB.
If I'm not mistaken PHP crypt() function use DES-based encryption algorithm. So I've search DES Encryption code and all that I found is code that similar to the one in this post http://www.vbforums.com/showthread.php?t=471798
But with those codes I must enter 8 character lenght salt. Less then that the code wouldn't succeed. In the other hand. The PHP crypt() function only could use 2 character length salt. If you enter more than that, it seems it only use the first 2 character..[URL]
I'm trying to create a password change form for my company's vendors. There are a couple of scenarios I could encounter doing this:
1 - User enters invalid current password
2 - New passwords do not match
3 - User's account is locked
4 - User cannot authenticate because password is expired
It's case 4 that I'm struggling with, because their is no way for me to take the password the user entered and verify it against active directory without getting an error.
I am implementing a system where the user can Reset their password if they have forgotten it.Once it is reset I want to give them the option of changing the password so that it will be something more memorable to them.The password is hashed and if i enter in the correct old password and new password the password does change.If I enter in the wrong old password and new password the password doesnt change.Is there a way to match the old password with the old password field in code behind so I can throw up an error to the user to tell them what is wrong? [code]
View 1 RepliesHow do you get a textbox being using for password entry to display the black circle that you often see in web forms, on the iphone etc etc?
I can change the PasswordChar property to an asterisk no problem and even copying and pasting symbols inserted into Word seemed to work - just couldn't find a symbol that looked like a bullet point!
Can this actually be achieved for a standalone exe, or is it something unique to web forms? Surely copying and pasting symbols from Word isn't actually the answer?
I read and write the cells from excell sheet sucessfully. now please i need a advise on the following
1. Where i save the file? at the time of project publishing it include also with the project?
2. how i check file exits or not?
3. How i pass the password if excell sheet have password and enable macro?
I'm currently working on a CRM project in vb.net. I want the program to start with a prompt that asks for a password and if the user enters the correct password then the main form loads.Im having some problems wrapping my mind around this...
View 10 RepliesI am looking to create a simple password box that will ask the user for a username and pass, if the user is validated against the usernames and passwords in an .ini file the login box will close and launch a program also stated in the .ini file. I would also like to be able to launch different programs for different users.
View 16 Replieshow to reset the existing password(topsecret)with a new password by using the "replace" keyword
in the below code shown
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code]....
I have a button on my Form called EditingButton that will have a DialogBox appear asking for a password. How can I have "*" show instead of the Password it-self when the user enters the password?[URL]...
View 1 RepliesI have developed a task Using VB.net (windows Application). I want to create a Login window for the Current user only allowed to use my application.So In my Login window UserNAme textbox I have showed the curent Login UserNAme like,
txtUserName.Text=Environment.UserDomainName & "" & Environment.UserName
And I have set txtUserName.Readonly =True.
Now the User to type the Password in my application password textbox.
[code]......
We are currently creating a library system which includes a forgot password module. but we are having difficulties in retrieving the passwords from our database.[code]...
View 1 RepliesIn my login form, there's a Forgot Password button. In the Forgot Password form, the user is asked to answer a secret question that he filled up upon registration, and if the answer is correct it will lead him to a Change Password form. My problem is, I don't know how to get then delete and then replace the password of a certain user. I attached some screen shots of my work.
View 1 RepliesI am trying work on a Form in VB 2008 that allow our Windows users change their domain account password. My code below
Dim dcDNS
As
String =
"Vietnamohio"
[Code]...
I'm a newbie in vb. My first project is a grading system for a certain school. In my login form, there's a Forgot Password button. In the Forgot Password form, the user is asked to answer a secret question that he filled up upon registration, and if the answer is correct it will lead him to a Change Password form. My problem is, I don't know how to get then delete and then replace the password of a certain user
View 1 Repliescreating a password generator in VB using VS 2008.What I want to do is have a front end which has a text box (to enter password length), a button (to generate a password) and a label (to display the password).I have been successful in creating random numbers; however a password containing just numbers isn't sufficient. So I would like random characters including uppercase and lowercase letters.
View 4 Repliesi would like to create a password generator however i have a 2 text box aplication the top one is where the person types their e-mail address then select generate. the program must then use that address to generate a unique password only for that person if another email address is inserted in the top text box a total different password should be generated.
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