encryption-symmetric

I am using Android to encrypt and encrypt images sent between apps. The encryption works well but when the file arrives at the destination it will not decrypt. Now I have copied the file at the destination app and decrypted it successfully using 3rd-party software. The error I get is:"Error while finalizing cipher" at CipherInputStream (CipherInputStream.java:107) caused by IllegalBlockSizeException. The encryption & decryption code is below: public static String encrypt(String plainFile, String encryptedFile) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException,

I've the task to transfer small binary messages (1 or 2 kb long) between a desktop application and mobile devices. The messages should be encrypted asymmetrically (RSA for instance). From what I've learned one should use a hybrid cryptosystem for this kind of task: Generate random symmetric key Encrypt plain text with symmetric key (using AES for instance) Encrypt symmetric key with public key Transmit cipher text and encrypted symmetric key I'd like to not invent an own format for storing the cipher text and the encrypted symmetric key. So I stumbled over CMS standard (Cryptographic message

This is the scenario we have: We have huge encrypted files, in the order of gigabytes that we can decrypt correctly if we read them until the end. The problem arises when we are reading and detect some flag in the file, then we stop reading and call reader.Close(), what happens is that a CryptographicException: "Padding is invalid and cannot be removed." is thrown. I have this small console app that reproduce this behavior, to test it just run it, it will create a file in your C:\ drive and then it will read line by line when pressing any key, and will stop when pressing 'q'. using System;

I'm in a situation where I need to encrypt / decrypt a file of n length securely, ideally using Rijndael, but definitely at 256bit encryption. I've played around with encryption before and have encrypted/decrypted strings and byte arrays quite happily. However, because I don't know the size of the file (and it's very feasible that the files in question could be quite large (~2.5gb) I can't just load them up into a byte array and enc/decrypt them in a single bound as I have before. So, after a bit of reading around on Google, I knew the answer was to encrypt and decrypt the file in chunks, and

I am using a AES encryption/decryption class that needs a key value and vector value encrypt and decrypt data in an MVC3 application. On saving the record I am encrypting the data then storing in a database. When i retrieve the record i am decrypting in the controller and passing the unencrypted value to the view. The concern is not protecting data as it traverses the network but to protect the database should it be compromised. I have read many posts that say dont put the keys for encryption in your code. Ok so where should they be kept? File system? Another Database? Looking for some

I understand that through SSL, the browser gets the public key of the secured website and through public key encryption rsa algorithm, these 2 establish session key and then continue communication thru some symmetric algorithm, because symmetric key encryption/decryption is faster. Which symmetric key algorithm does SSL use? DES? AES? or something else? When the client connects to the server, it negotiates a so-called ciphersuite (combination of encryption, key exchange, authentication algorithms) to use. Each SSL client or server has a list of allowed ciphersuites and during handshake the