Bitcrypt

BitCrypt 6.0Free A free ultra-strong encryption that hides text in bitmap images3.4 BitCrypt is an elegant encryption that allows for the storage and transmission of information in an undetectable manner. The program processes a user-supplied text encrypting it with the Rijndael cipher and storing it in a user-selected bitmap image. This later step is called steganography, which means "to hide invisibly".If you intend to store sensitive information invisibly, you may encrypt it with BitCrypt and keep it in a picture image. Alternatively, if you intend to pass information to another party, you may encrypt it using BitCrypt and publish it as a part of a website. In this manner, another party can access it without anyone realizing that information is transmitted. The program hides the complexity of its inner workings and is easy to use. It requires only a few steps to perform the task of storing and retrieving text. For the latest updates visit bitcrypt.moshe-szweizer.com

Behind the CryptoLocker infections. The spammed messages contained malicious attachments that belonged to TROJ_UPATRE, a malware family characterized by its small file size and simple downloading function — it downloads a ZBOT variant, which then downloads the CryptoLocker malware.Near the end of 2013, a new variant of CryptoLocker emerged — this time, with propagation routines. This variant, detected as WORM_CRILOCK.A, can spread via removable drives, a routine unheard of in other CRILOCK variants. This means that the malware can easily spread compared to other variants. Additionally, it does not rely on downloader malware like CRILOCK to infect systems; rather, it pretends to be an activator for software used on peer-to-peer (P2P) file-sharing sites. Technical differences have led some researchers to believe that this malware was produced by a copycat.Afterward, another file-encrypting ransomware type soon came into the picture. The cryptoransomware known as CryptoDefense or CryptorBit (detected as TROJ_CRYPTRBIT.H) encrypts database, web, office, video, image, script, text, and other non-binary files. It also deletes backup files to prevent the restoration of encrypted files and demands payment for a decryption key for the locked files.Files to EncryptEarlier cryptoransomware types targeted .doc, .xls, .jpg, .zip, .pdf, and other commonly used files to encrypt them. Cybercriminals have since included a number of other file types that are critical to businesses, like database files, website files, SQL files, tax-related files, CAD files, and virtual desktop files.The Foray into Cryptocurrency TheftRansomware soon began to incorporate yet another element: cryptocurrency (such as bitcoin) theft. In 2014, Trend Micro saw two variants of a new malware called BitCrypt. The first variant, TROJ_CRIBIT.A, appends “.bitcrypt” to any encrypted files and displays a ransom note in English. The second variant, TROJ_CRIBIT.B, appends the file name with “.bitcrypt 2″ and uses a multilingual ransom note in 10 languages. CRIBIT variants use the encryption algorithms RSA(426)-AES and RSA(1024)-AES to encrypt the files and specifies that the payment for unlocking files be made in bitcoins.It was also discovered that a variant of the Fareit information stealing malware, TSPY_FAREIT.BB, downloads TROJ_CRIBIT.B. This Fareit variant can steal information from various cryptocurrency wallets, including wallet.dat (Bitcoin),

Keys. These public keys could be provided through some other route and the encryption schema would remain the same.For some of the Elliptic Curve operations, I've copied some code from for convenience. All that occurs here is Elliptic Curve addition, multiplication, etc. This code does not originate any private keys; it is purely mechanical.###Example Usagefrom bitcrypt import *message = write_message_for_address('hi', '1EHNa6Q4Jz2uvNExL497mE43ikXhwF6kZm', '5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAvUcVfH')(this is the public address corresponding with secret exponent = 1 and private key for secret exponent = 2)message{'ciphertext': 'n/9zUY0FfAYusbO5RhtP5meHztOuh5HM9PUG5YUqCWE=', 'point_x': 89565891926547004231252920425935692360644145829622209833684329913297188986597L, 'point_y': 12158399299693830322967808612713398636155367887041628176798871954788371653930L, 'iv': 'NnfufNoLc8OgcWYq'}(the x and y coordinates are the public key point for ME, ie, the public address corresponding to secret exponent = 2 )decrypted = decrypt_message(message, '5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf')(use the private key corresponding to the receiving address, ie, secret_exponent = 1)decrypted('hi ', True)You can, of course, use a known pubkey directly instead of searching the Blockchain with the key_scraping utility. Just use assemble_message().####Things you could conceivably do with Bitcrypt-- Log into websites with encrypted messages-- Speak to financial counterparts as the cryptographically proven owner of certain financial assets. Every message you write proves you own X bitcoins. It also links you tothe full transactional history behind that address.-- Control Devices on the Blockchain with encrypted commands

##Bitcrypt###Encrypted Messaging Built Into BitcoinWrite encrypted messages in the language of Bitcoin.-- Send encrypted messages to Bitcoin addressesOnly the holder of that address can decipher the message-- Send an encrypted message provably as the owner of a given Bitcoin address.You prove you own an address, while saying whatever you want, without losing anonymity.###Highlights-- Diffie-Helman Key Exchange to create a secret shared key-- Symmetric Encryption with AES-CBC with the shared key for encrypted messaging-- Scrapes the public key for the receiving address from the Blockchain record.This will not always yield a result. Only addresses that have signed pay-to-pubkeyhash scripts will yield a public key. Uses Blockchain.info for now; could use bitcoind directly if necessary.-- Encrypted time threshold to mitigate replay attacks.###Present Status-- This is a prototype only. This is not a finished product and should not beused for serious security.-- Everything is unreviewed. Please feel free to offer constructive feedback.-- There are some issues with padding that I would like feedback on. I'm not sure what level of secure padding is necessary.-- Also the way in which I map the calculated shared secret point to a key for AES should be checked for any predictable weaknesses to outsiders.###Design Philosophy-- Use existing tools that are strong.-- Rely on the most simplistic approach to minimize risks I'm not aware of.My goal is for cleartext communication channels to also be cryptographically secure and linked to financial tools built on Bitcoin.I would like Bitcoin public addresses to represent identity in general. Whatever you want to do, your public keyshould be your outward face.###DependenciesPyCrypto. I'm relying on this for AES encryption.Vitalik's pybitcointools. This is a helpful utility.Richard Kiss's PyCoin library. I'm only using this in converting private keys to secret exponents. I was too lazy to do this myself.It touches the Blockchain.info API for scraping public