For a web application, I would like to create a simple but effective licensing system. In C#, this is a little difficult, since my decryption method could be viewed by anyone with Reflector installed. What are some methods for encrypting files in C# that are fairly tamper-proof? ...
I am a little new to cryptography so this could be something really stupid. I am struggling with getting this encryption decryption to work right. I am using this http://www.chaosink.co.uk/files/code/encryptionutils.zip class provided by Wolfwyrd (Thanks!) and following instructions in http://stackoverflow.com/questions/359342/an-effecti...
I am creating a program that needs to store the user's data in encrypted form. The user enters a password before encryption and is required to supply the password again to retrieve the data. Decryption takes a while if there is a lot of data. Now, I want to check that the user has entered the correct password before doing the decryption...
A file has been encrypted by Perl. Initial decrypt attempts failed and I am now trying to ascertain whether there is any hoojoo going on (some other settings required) Duff Perl Code: use strict; use Crypt::Rijndael; my $key ='...'; my $rcipher = Crypt::Rijndael->new ($key, Crypt::Rijndael::MODE_CBC()); undef $/; my $encrypted = <>...
I'm a PHP developer who knows almost nothing about .NET. I've been asked by the .NET guys at work to translate .NET code that decrypts an authentication ticket into PHP so that the PHP code can then set the appropriate session variables for my application to run. Is this even possible? I'm staring at the code and it's baffling me. I'll k...
Hello there! I need to mimic what MySQL does when encrypting and decrypting strings using built-in functions AES_ENCRYPT() and AES_DECRYPT(). I have read a couple of blog posts and apparently MySQL uses AES 128-bit encryption for those functions. On top of that, since this encryption requires a 16-bit key, MySQL pads the string with x0...
My problem is actually a bit more complicated than just how to use AES in VB.NET, since what I'm really trying to do is use AES in VB.NET from within a Java application across JACOB. But for now, what I need to focus on is the AES implementation itself. Here's my encryption code Public Function EncryptAES(ByVal toEncrypt As String, By...
Hi, I have an application to 'roll out' to about 20 people. Storing the DB credentials in the config file is a no no, so what id like to happen, is for each PC to send its public key to the server, then the server encrypts and sends back data to client for decryption. Are there any sort of TCP services I could run to do this that alre...
I need to store and encrypt a password in a (preferably text) file, that I later need to be able to decrypt. The password is for another service that I use, and needs to be sent there in clear text (over SSL). This is not something I can change. What are best practices in this area? How can achieve some degree of protection of the passwo...
Ofcourse similar questions have been asked in stackoverflow but I dont want to use any third party library like Crypto or something. So I need to generate a code based on user email and decrypt the code to generate the email back. Can I do it in python? ...
Well I have been working on an assigment and it states: A program has to be developed, and coded in C language, to decipher a document written in Italian that is encoded using a secret key. The secret key is obtained as random permutation of all the uppercase letters, lowercase letters, numbers and blank space. As an example, let us con...
I have a client app that needs to save a username/password for an SMTP Server. This data will be going into SQL Server 2005, and consumed by my server app. The server app will use the System.Net.Mail namespace to send e-mail messages using the supplied credentials (and from that user's e-mail address). How can I encrypt/decrypt the passw...
I am trying to decrypt a file in Java which was encrypted in C# using Rijndael/CBC/PKCS7. I keep getting the following exception: javax.crypto.BadPaddingException: pad block corrupted at org.bouncycastle.jce.provider.JCEBlockCipher.engineDoFinal(Unknown Source) at javax.crypto.Cipher.doFinal(DashoA13*..) at AESFileDecrypter....
I have a database that encrypted with windows CAPICOM library with RC4. Following PHP script works fine on windows server. ... $oCapiCapi = new COM("CAPICOM.EncryptedData"); $oCapiCapi -> Algorithm = 1; $oCapiCapi -> Algorithm -> KeyLength = 3; $oCapiCapi -> SetSecret('OURveRYSecretKey'); ... $oCapiCapi -> Decrypt($orsd[1]); $...
I am using AES/CBC/PKCS5Padding cipher instance for AES encryption and decryption in java How can I decrypt the data using blackberry encrypted by above in java. decrypting data with AES/CBC/PKCS5Padding using blackberry Thanks Bapi ...
Hi, I am half th way of my problem,,. Please Help I have succesfuly encrypted the text using public key of digital signatures but while decrypting it. i am getting error Error occurred while decoding OAEP padding my piece of code #region Test Encryption public void a() { using (var rsa = new RSACryptoServiceProvider()) { // This St...
in continuation of the http://stackoverflow.com/questions/949907/error-occurred-while-decoding-oaep-padding question I have modified my code and now i am trying this code CspParameters cspParam = new CspParameters(); cspParam = new CspParameters(); cspParam.Flags = CspProviderFlags.UseMachineKeyStore; clsCertificates cc = new clsCer...
I have a encryted database and decryption key. How to keep decryption key away from hacking(Both database hacking and unauthorizated accessing PC.)? Hardcode in assembly. keep in registry. keep in RAM. Moreover, I need algorithm for encryted data. What's the best algorith for doing this in security per decryption time term? RSA AES...
I have a large amount of data that was encrypted by a third party tool before it was backed up, now we no longer have access to the tool and I NEED the data what is the most effective way to try and determine how the data was encrypted? ...
Hi, I'm trying to implement a single-sign-on link from application written in JAVA, to another web app written in PHP. I'd like a way to encrypt the username in .JSP and then decrypt in PHP. I need to find functions matching functions that will allow this. ...