I am trying to use BouncyCastle to encrypt a file using the PKCS 7 file standard. Here is the code I have which outputs a p7m file. When I go to decrypt the file (using Entrust) I am prompted for my key store password, so it knows the file was encrypted for me using AES 128, but it cannot decrypt the body of the file. Something has to be...
Is there any way to perform private key encryption in C#? I know about the standard RSACryptoServiceProvider in System.Security.Cryptography, but these classes provide only public key encryption and private key decryption. Also, they provide digital signature functionality, which uses internally private key encryption, but there are not...
We have a requirement to encrypt data client side to ensure a 'secure' channel exists between our client's browser and a vendor. Basic premise is: Vendor generates a public / private keypair: VendorPub and VendorPriv Our clients enter sensitive data. On submit the javascript on the form encrypts the sensitive portions of the data, wh...
Assuming a keystore is secure and one needs to service around a million keys , is it better to generate asymmetric keys in real-time or is it better to generate a bunch of keys and store them to be used as and when required? Edit 1: By real time I mean generate a key pair when a user registers for the first time , from then on that key...
This code generates a pair of public/private keys: KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); keyGen.initialize(1024); KeyPair keypair = keyGen.genKeyPair(); PrivateKey privateKey = keypair.getPrivate(); PublicKey publicKey = keypair.getPublic(); What I'd like to know is how do you usually store the public key: Op...
I need to encrypt a 100KB file using a public key. I've been reading some posts claiming that it is not practical to directly encrypt large files using a public key, and that the preferred method is to encrypt the file using a symmetric key and then encrypt this symmetric key using the public key. It seems that a naive solution would be ...
Hello. I've seen on this forum that are many professionals that are willing to give a helping hand to beginners like me. I am on my Android beginnings and I am struggling to learn as much as possible. I want to test RSA and ASE encryption and decryption in an android application. I searched around the net but I didn't manage to find ve...
hey crypto experts, looking to do RSA encryption on a short string in python. This is for a piece of user data that I want to store without staff (incl myself) being able to see it. The private key will be on a thumbdrive in my safety deposit box for when we get subpoenaed. my question: is there a 'probably correct' python package for ...
Hey, I have an exam tomorrow in Advanced Development, but I am stuck on the topic of Encryption. I have read up on it at http://support.microsoft.com/kb/246071. However I am still confused. If a message is encrypted using Asymmetric Encryption, using the public key, how is the decryptor going to know the private key with which to decry...
I want to encrypt an existing column in SQL Server 2005, using an UPDATE statement, moving the old content into the new encrypted column. So I have 2 choices: Symmetric and Asymmetric. The issue I have is that with a symmetric key, I have to embed the password into an SP in order to read the column like: -- Create key (at some earlier...
I'm currently experimenting with both public-key and personal file encryption. The programs I use have 2048 bit RSA and 256 bit AES level encryption respectively. As a newbie to this stuff (I've only been a cypherpunk for about a month now - and am a little new to information systems) I'm not familiar with RSA algorithms, but that's not ...
Hi all, I am working on gcrypt library and want to generate public/private key pair in C under linux environment. I want to use S-expressions for this. I have read the reference manuals which gives some idea about the functions which can be used but not very sure how to use it. Can someone point me to good sources or some sample codes ...
Here is my issue. I have an account object as follows: public class Account { public virtual int AccountId { get; set; } [Required(ErrorMessage = "Email address is required.")] public virtual string EmailAddress { get; set; } [Required(ErrorMessage = "A password is required.")] public virtu...
I am having problems with our third party vendor implimenting an sso. They are receiving the following error when verifying my signature: java.lang.ArithmeticException: BigInteger: modulus not positive--at java.math.BigInteger.modPow(BigInteger.java:1556) I have no control over their Java code. Here is what I am doing now: I created ...