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2014/10/16 ¤W¤È 08:11:11
android Programming Glossary: ciphertextEncryption with AES-256 and the Initialization Vector http://stackoverflow.com/questions/4504280/encryption-with-aes-256-and-the-initialization-vector with the same key and plaintext is re used a different ciphertext will be produced. If the IV is deterministically produced from.. produced from the password only you'd get the same ciphertext every time. In the cited example a salt is randomly chosen so.. or a salt if you use the second method together with the ciphertext. You won't have good security if everything is derived from..
Encrypt with Node.js Crypto module and decrypt with Java (in Android app) http://stackoverflow.com/questions/7787773/encrypt-with-node-js-crypto-module-and-decrypt-with-java-in-android-app 'hex' now crypted contains the hex representation of the ciphertext and java private static String decrypt byte raw byte encrypted..
What are best practices for using AES encryption in Android? http://stackoverflow.com/questions/8622367/what-are-best-practices-for-using-aes-encryption-in-android and is combined through XOR with that block to produce the ciphertext or plaintext. Galois counter mode GCM provides integrity protection.. encoded version of the plaintext and return a hex encoded ciphertext. The ciphertext can also be base 64 since the exact representation.. of the plaintext and return a hex encoded ciphertext. The ciphertext can also be base 64 since the exact representation shouldn't..
http://stackoverflow.com/questions/17079579/aes-algo-decryption-issue needs. Usage try DescEncrypter ec new DescEncrypter byte cipherText ec.encrypt hi hello String enc new String cipherText UTF 8 String.. byte cipherText ec.encrypt hi hello String enc new String cipherText UTF 8 String decryp ec.decrypt hi cipherText catch UnsupportedEncodingException.. new String cipherText UTF 8 String decryp ec.decrypt hi cipherText catch UnsupportedEncodingException e e.printStackTrace DescEncrypter.java..
http://stackoverflow.com/questions/3150830/android-encryption encryption pass cipher.init Cipher.ENCRYPT_MODE key byte cipherText new byte cipher.getOutputSize input.length int ctLength cipher.update.. int ctLength cipher.update input 0 input.length cipherText 0 ctLength cipher.doFinal cipherText ctLength System.out.println.. input 0 input.length cipherText 0 ctLength cipher.doFinal cipherText ctLength System.out.println new String cipherText System.out.println..
Encryption with AES-256 and the Initialization Vector http://stackoverflow.com/questions/4504280/encryption-with-aes-256-and-the-initialization-vector from the password alone. The point of the IV that even with the same key and plaintext is re used a different ciphertext will be produced. If the IV is deterministically produced from the password only you'd get the same ciphertext every time... ciphertext will be produced. If the IV is deterministically produced from the password only you'd get the same ciphertext every time. In the cited example a salt is randomly chosen so a new key is generated even with the same password. Just use.. you have to store either the IV if you use the first method or a salt if you use the second method together with the ciphertext. You won't have good security if everything is derived from the password you need some randomness in every message. share..
Encrypt with Node.js Crypto module and decrypt with Java (in Android app) http://stackoverflow.com/questions/7787773/encrypt-with-node-js-crypto-module-and-decrypt-with-java-in-android-app crypted cipher.update text 'utf8' 'hex' crypted cipher.final 'hex' now crypted contains the hex representation of the ciphertext and java private static String decrypt byte raw byte encrypted throws Exception SecretKeySpec skeySpec new SecretKeySpec..
What are best practices for using AES encryption in Android? http://stackoverflow.com/questions/8622367/what-are-best-practices-for-using-aes-encryption-in-android 1 after each block. For each block the counter is encrypted and is combined through XOR with that block to produce the ciphertext or plaintext. Galois counter mode GCM provides integrity protection however it is not available in all Java versions is.. encoded string. The encrypt and decrypt methods use a UTF 8 encoded version of the plaintext and return a hex encoded ciphertext. The ciphertext can also be base 64 since the exact representation shouldn't matter as long as it's encrypted and is used.. The encrypt and decrypt methods use a UTF 8 encoded version of the plaintext and return a hex encoded ciphertext. The ciphertext can also be base 64 since the exact representation shouldn't matter as long as it's encrypted and is used the same way by..
http://stackoverflow.com/questions/17079579/aes-algo-decryption-issue the below for reference.Modify the below according to your needs. Usage try DescEncrypter ec new DescEncrypter byte cipherText ec.encrypt hi hello String enc new String cipherText UTF 8 String decryp ec.decrypt hi cipherText catch UnsupportedEncodingException.. to your needs. Usage try DescEncrypter ec new DescEncrypter byte cipherText ec.encrypt hi hello String enc new String cipherText UTF 8 String decryp ec.decrypt hi cipherText catch UnsupportedEncodingException e e.printStackTrace DescEncrypter.java import.. DescEncrypter byte cipherText ec.encrypt hi hello String enc new String cipherText UTF 8 String decryp ec.decrypt hi cipherText catch UnsupportedEncodingException e e.printStackTrace DescEncrypter.java import javax.crypto.Cipher import javax.crypto.SecretKey..
http://stackoverflow.com/questions/3150830/android-encryption AES ECB PKCS7Padding BC System.out.println new String input encryption pass cipher.init Cipher.ENCRYPT_MODE key byte cipherText new byte cipher.getOutputSize input.length int ctLength cipher.update input 0 input.length cipherText 0 ctLength cipher.doFinal.. key byte cipherText new byte cipher.getOutputSize input.length int ctLength cipher.update input 0 input.length cipherText 0 ctLength cipher.doFinal cipherText ctLength System.out.println new String cipherText System.out.println ctLength decryption.. cipher.getOutputSize input.length int ctLength cipher.update input 0 input.length cipherText 0 ctLength cipher.doFinal cipherText ctLength System.out.println new String cipherText System.out.println ctLength decryption pass cipher.init Cipher.DECRYPT_MODE..
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