VS 2008 Salting Then Hashing A Password?
Nov 30, 2009Im trying to make a little login app that connects to my mysql. But I cant figure out how would i salt the password then hash it?
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Drupal 7 Password Hashing Algorithm?
Jul 23, 2011How can I Implement Drupal 7's Hashing Algorithm into my software so that I can make a database query that allows the user to login? I know that they use SHA-256 bit and they use Base64 encoding and a salt generating algorithm...
View 1 RepliesVS 2008 How Does Salting A Md5 Work On A Data Base
Aug 26, 2009can someone tell me how salting works. i get stuck when adding more info to the data.
View 2 RepliesVS 2008 - Hashing A File - Using The SHA256 Algorithm
May 6, 2009I know I can MD5 hash a file, but how do I go about using the SHA256 algorithm?
View 6 RepliesVS 2008 Updating An Application From Internet - Hashing Method
Aug 5, 2009I have created an updater for my application. When the application starts the user can launch an updater that will check for the latest version. Download it and copy the files to where the installation is.
Everything works fine.
However, I am looking for a more robust technique. And I have discovered it is better to hash the files on the web server with a hash algorithm and then when they have downloaded use the same hash algorithm to compare the hash values. If they are different either the files were corrupted when downloaded or some modified them without permission.
However, my problem is where do I store the hash values? I was thinking of hashing the files, and storing all the hash values for each file in a text file, and my updater will download that text file.
I am not sure if that is the best technique to use of not? Is this the normal and best way to do this?
Which Is More Secured / Iterative Salting Or Encryption Methods?
Jun 13, 2011I have a question in security programming. As all of us know, when we have a database with passwords or anything sensitive, we would like to encrypt it so it is not readable by other. Now I want to know, which of the method is secured or less secured. Is it Iterative Salting (1000x iterative) or Encryption method such as SHA 256, MD5, and all others. Kindly give me your opinion on this please.
View 11 RepliesConvert This Hashing Method From C#?
Aug 21, 2009public static string CalculateSHA1(string text, Encoding enc)
{
byte[] buffer = enc.GetBytes(text);
SHA1CryptoServiceProvider cryptoTransformSHA1 = new SHA1CryptoServiceProvider();
[code]....
VStudio keeps yelling at me for just what I have so far most specifically the bracket at the end of Byte?:
Private Sub CalculateSHA1(ByVal text As String, ByVal enc As Encoding)
Dim buffer As Byte[] = enc.GetBytes(text);
End Sub
CryptoStream And CRC32 Hashing?
Feb 11, 2012I'm encrypting a file with AES using CryptoStream. I'm also creating a CRC32 hash of the original file data. Later I need to decrypt the file and create a CRC32 hash of the decrypted data, in order to check if the decrypted file is 100% the same as the original file.
This is a part of the encryption routine. I'm reading a file in chunks and writing them encrypted to a new file. At the same time I'm creating a CRC32 hash of the chunks of data, which will give me the CRC32 hash of the entire file in the end. This works fine.
vb.net
'// Create the CryptoStream
Dim Crypto_Stream As New CryptoStream(FS, crypto_transform, CryptoStreamMode.Write)
[code]....
Hashing Files Bigger Than 2GB?
Jan 2, 2010I have discovered that the .Net Hashing functions, MD5, SHA1, and SHA512 (all of them probably) do not allow us to create hashes of files greatedr than 2GB in size. If I use a function like the following:
Friend
Function
HashMD5File(ByVal
[code].....
Hashing Individual Contents Of Array
Nov 8, 2011I'm trying to teach myself arrays as I have not extensively worked them. So I thought of a basic program to hash the contents of an array and list the output of the array word next to the hash value of it.
[Code]...
Create A FCS16 (Frame-Check-Sequence) Hashing Algorithm?
Nov 9, 2011I've been trying to create a FCS16 (Frame-Check-Sequence) hashing algorithm, but so far the only explanation I've found is this [URL]and I'm having trouble writing the code.
View 5 RepliesPerform Two Hashing Operations Concurrently On A Single File Without Reading The File Twice?
May 18, 2011I want to perform two hashing operations concurrently on a single file, without reading the file twice. Is there some way to share the FileStream between two synchronized hashing threads? For example:
Dim Stream As New IO.FileStream("...", IO.FileMode.Open)
Dim HashA, HashB As Byte()
Dim A = New System.Threading.Thread(Sub()
[code]....
Maybe some way of caching a stream? Trouble is, I don't want the entire file in memory at once (it could be many gigabytes in size) and I don't want the file read more than once, due to speed issues. I want the file cached only sufficiently to ensure that both threads can work.For example, suppose at some point in time, thread A had read 100k of the file, but thread B had only read 20k of the file. The portion of the file between 20k and 100k should be cached; but then progressively forgotten as thread B catches up. Then again, if thread B is too slow, we might still end up with hundreds of megabytes being cached.Maybe thread A should be made to wait while thread B catches up. Maybe the ReadByte() function of the stream should block for a while if one of the threads is too far behind?
Checking AD Password - Create A Password Change Form For My Company's Vendors
Jan 15, 2012I'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.
Membership ChangePassword (hashed) Match Current Password Against Old Password Field
Jun 1, 2011I 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 RepliesPassword Characters - Get A Textbox Being Using For Password Entry To Display The Black Circle
Feb 10, 2009How 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?
Pass Password If Excell Sheet Have Password And Enable Macro?
Jul 25, 2011I 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?
Password Implementation - Program To Start With A Prompt That Asks For A Password
Apr 21, 2010I'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 RepliesCreate A Simple Password Box That Will Ask The User For A Username And Password?
Jul 15, 2009I 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 RepliesPassword Encryption - Way To Inerlock Letters In A Password?
Dec 2, 2009Is 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 RepliesReset The Existing Password (topsecret) With A New Password
Jan 15, 2012how 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]....
Show Instead Of The Password It-self When The User Enters The Password?
Apr 10, 2010I 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 RepliesValidate The Given Password Is Same As The Current Users PAssword?
Mar 21, 2011I 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]......
Retrieve Password In 2008?
Feb 12, 2011We 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 RepliesVS 2008 Password Encryption?
Nov 2, 2009I 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?
Change A Password From MS Access Using .net 2008?
Feb 25, 2009In 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 RepliesChange Domain Password In VB 2008?
Apr 25, 2010I 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]...
Change Password In MS Access Using 2008?
Jun 16, 2011I'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?
Jun 21, 2010creating 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 RepliesVS 2008 - Create A Password Generator
May 23, 2011i 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.
View 5 RepliesVS 2008 : Reset Windows Seven Password?
Mar 1, 2010I am looking forward to reset password of Windows Seven by my app.Using command
net user user_name *
But I don't know how to run this command
process.start("net user" & user_name & "*")
gives error.So how to do that or is there any other direct command which can change/reset windows password.