Security :: Encryption And Decryption Codes In C# For RSA, MD5 And HMAC-SHA1 For Generated Key?

Mar 4, 2011

I want the encryption and decryption codes in C# for RSA, MD5 and HMAC-SHA1 for generated key.

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Security :: Encryption Decryption From A Java Generated Key?

Aug 24, 2010

I have a Triple DES Key generated by java code from a third party vendor. It is a 3 part key.

We need to use this key in our VB.NET application. When I try to combine this key and use it in my app

'Dim desTransform As ICryptoTransform = desCrypto.CreateEncryptor(EncryptKey(Key), EncryptIV(IV))' gives me an error ' Specified key is not a valid size for this algorithm)

I am new to cryptography and do not understand the algorithms well. How can I use the java generated key in our app for encrypt/decrypt.

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Security :: HMAC Encryption Key Store?

Feb 17, 2010

I am developing a application to use the HMAC encryption (SHA1). I do not want to store the encryption keys in .config files or in database. In .net is there any other alternatives to securely store the encrption keys

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Security :: Encryption/Decryption With CAPICOM?

Jun 9, 2010

I am trying to encrypt/decrypt a file with CAPICOM in javascript. I have to encrypt file with private key and decrypt with public key. But I dont know how to do this with CAPICOM.

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Security :: Web.Config Encryption/decryption?

Mar 13, 2010

This is meant to be easy ive been told, but still cant get it to work!I have a sql database hosted on a shared server which requires the use of sql authentication.As a result I require to encrypt my sensitive data in the config (connection strings etc).I understand that you can do this using aspnet_regiis etc, but ive been told that as I have no direct acccess to the server, I may need to program the encryption.
I have seen a few examples, but as a novice I have been banging away at this, looking at an errors screen most of the time!

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Security :: Encrypted Password - Sort Of Encryption Or Decryption In Order To Verify The Credentials

Jun 16, 2010

For our website, we have decided we would like to maintain our user passwords as encrypted binary data in our database. We are using ASP.NET 3.5 to host our site and SQL Server Express 2008 for the database, both running on the same server. When a user logs in and submits a username and password, there will need to be some sort of encryption or decryption in order to verify the credentials. To me, it would appear that there are 3 ways to do this:

1)[C# Encyrption] On User creation, perform encryption in the Web App and submit the encrypted password to the database. To verify credentials at Login, perform the same encryption on the submitted password and ensure that it matches the value stored in the database.

2)[SQL Encryption] On User creation, submit the plain-text password to the database and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, have the database perform decryption on the password during the SELECT statement, and compare the plain-text submitted password to the one in the database.

3)[Mix] On User creation, submit the plain-text password to the database, and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, perform the same encryption algorithm used by SQL on the submitted password ( is this possible? ), and ensure that it matches the value stored in the database.

Does anybody have an opinion as to which of these options is best? Number 1) is the most familiar to me, and would be the easiest to use with LINQ to SQL ( which is our current data model ), so I am leaning towards that. But if there are better options I would love to know about them.

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Standard Encryption Decryption Across Different Platforms?

May 28, 2010

i need to implement a standard encryption decryption logic across an entire project platform which has different clients implemented using different platforms as follows:

iphone app (objectiv c)
website (classic asp)
webservice (
samsung bada app (c++)

the iphone app as well as the website need to send info to webservice using encrypted query strings

the web service then decrypts this and processes the info further

wanted to know the simplest way to achieve this. is there some free and ready to use binary available with an easy to use api to achieve this?

encryption needs to be as secure as possible

edited: currently we use AES on the website and webservice front

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Web Forms :: Encryption And Decryption Using Commands?

Mar 8, 2011

I have web.config file and it is encrypted completely and hosted in one server,Now I got one requirement to change admin person mail id. So I need to decrypt the web.config file and update the mail id then encrypt the config file again. Please tell me how to do this using aspnet_regiis -pdf commands?

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C# - Encryption And Decryption Key Where To Store And What To Use For .net Application?

Sep 14, 2010

We are designing a .net web application that has an external and internal site.

Both sites need to encrypt data only the internal site needs to decrypt data.

We are wondering what are the best practices for:

Which encryption method to choose?
Where to store the encryption / decryption key?

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C# -encryption And Decryption Connection Strings?

Mar 18, 2011

I used the following command to encrypt my connection string but an error ocurred,
"The connection name'DatabaseConnectionString1' was not found in the applications configuration or the connection string is empty" How can I encrypt it while keeping the application working? What if I move the encrypted application to another computer? Will it work?

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Web Forms :: Encryption And Decryption Of URL With Query String?

Oct 15, 2010

I am passing values through query string. I want to restrict the user to modify the url to get the unauthorized permissions.I want to encrypt the url so that user can not understand and decrypt and use in the code.How can i do this.If there is any method to restrict the user to modify the url,

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Secure Socket Layer (SSL) - How It Provide The Functionality Of Encryption And Decryption Of Data

Mar 3, 2011

explain me Secure Socket Layers (SSL) and how it provide the functionality of encryption and decryption of data ?

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DataSource Controls :: Algorithm For Simple Encryption And Decryption Of Field In Sql Server 2000?

Jan 2, 2010

I have to Encrypt and Decrypt Back the Password field in sql server i have used the pwdencrypt and pwdCompare() but i dont have to compare but i have to display the password back using the Decrypt technique Is there any algorithm which i can use only for encryption and decryption of password field?

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Security :: Encryption Algorithm - Encryption Of Data Required In The Coding?

Sep 16, 2010

Not sure if I'm posting the question in the right category.

1) I'm working in a project where encryption of data is high priority. Could some one suggest what would be the best encryption method to protect data from being cracked.

I'm using TCP/IP protocol.

2) Is HTTPS totally secured. If I'm using HTTPS, does that mean that there is no encryption of data required in the coding?

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Security :: How To Decrypt SHA1 Passwords

May 2, 2010

I have an page where I have used FormsAuthentication.HashPasswordForStoringInConfigFile. Encrypted password is saved in database. I have created a forgotPassword page. Where I need to send user his password. How can I decrypt it and send it to user. if SHA1 can not be decryoted what other option should I use to encrypt the passwords?

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Security :: How To Give SHA1's Hashed Data To Class

May 13, 2010

I have a problem .I am using CAPICOM for digitally sign the data and for this purpose i am using SHA1 algorithm.In CPICOM there is one class CAPICOM.SignedData which is used for this purpose.My problem is how can i give SHA1's hashed data to this class (to it's sign method) for returning the digital signature of exactly 172 bit long?



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State Management :: Same Hash Value Generated When Use Different Algorithms For Viewstate Encryption?

Aug 20, 2010

the same hash value generated when I use different algorithms for viewstate encryption.I have added below lines to the web.config file

<pages viewstateEncryptionMode="Always" enableViewStateMac="true".../>

<machineKey validationKey="AutoGenerate,IsolateApps" decryptionKey="AutoGenerate,IsolateApps" validation="AES" decryption="Auto" />

Also, compilation debug="false" ... > is set.No matter what I use (AES, MD5, SHA1, 3DES),it generates the same hash.Is there something I am missing out.And what is the default algorithm used if I don't specify anything?

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Security :: Encyption/decryption Of Connection String?

Mar 10, 2010

I have requirement to encrypt the windows service config file and web.config connection strings, I could able to do that for web.config with aspnet_regiisC:WindowsMicrosoft.NETFramework64v2.0.50727>aspnet_regiis -pe "connectionStrings" -app "/application.ui")But I am still looking similar kind of way for windows service config file to encrypt and decrypt..exe.config file snippet as below

<?xml version="1.0" encoding="utf-8" ?>


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Security :: No Encryption In URL?

Aug 4, 2010

I am using a Query Encryption Technique shown in Thread[URL]I am facing a problem with the above module status bar always displays real URL,& when ever i right click on page then properties than Address URL shows Real URL

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Security :: AES 256 Bit Encryption?

Jul 24, 2010

I would like to use the System.Security.Cryptography to encrypt / decrypt my passwords strings for my custom membership provider login.I've read some basic article's but they don't explain much about the process in detail. I've decided to use AES because it is said to replace DES encryption. How can I encrypt and decrypt my password strings in the strongest way possible with AES? I would really like a very detailed explanation about the method to use for this task.

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Security :: SSL And Further Encryption?

Dec 16, 2010

If a website is already using SSL, this guarantees a secure channel between the client and the website right. If I do another encrypt on the information being transmitted via HTTP POST would this be an overkill?

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Security :: Upgraded .Net From 1.1 To 2.0 - MD5 Encryption Is Different?

Mar 19, 2010

I inherited a ASP.Net website. Some changes need to be implemented. The login for the application is encrypted using the md5cryptoserviceprovider class. After upgrading to 2.0, the password is no longer encrypted the same as when it was 1.1.

I left the 1.1 virtual directory and it's still working. On the same box, I loaded the 2.0 code and setup a new virtual directory (which isn't encrypting the same as 1.1).

I copied the section below from the 1.1 machine.config section into the web.config and the 2.0 machine.config.

<machineKey validationKey="AutoGenerate,IsolateApps" decryptionKey="AutoGenerate,IsolateApps" validation="SHA1"/>

Here is the code that is generating the hash.

MD5CryptoServiceProvider encryptionServiceProvider = new MD5CryptoServiceProvider();

var bytes = ASCIIEncoding.ASCII.GetBytes(inputString);

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Security :: What Is Two Way Encryption And How Does That Work

Jul 27, 2010

what is two way encryption and how does that work ?

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Security :: AES / Rijndeal Encryption

Apr 11, 2010

I have a hex string (encrypted)I need to use Rijndael classes with these settings:

Encryption: AES

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Security :: DES Encryption, (c#) And Mcrypt (php)?

Jun 11, 2010

I have a problem trying to encrypt a string in PHP and also in C# using DES (cbc) encryption. The problem I'm facing is that I'm getting different results using the different languages.In C#:


You can see that they are close...

PHP: HLp51qoFW0rimOTafCVTVQ==
C# : HLp51qoFW0ojU8eGEGkk4w==

But something is going wrong somewhere, I suspect it's a difference between (PHP) pack("H*", '0F26EF560F26EF56') and (C#) StringToBytes.ConvertHex("0F26EF560F26EF56") but I'm really struggling to spot it.

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