Java DES Encryption Decryption File Tutorial. Java Cryptography Extension (JCE) provides framework and implementation for generating key and encryption/decryption of data using various algorithms. In this tutorial, we will use Java DES implementation to encrypt and decrypt a file. DES is a block cipher algorithm in which we will have to use same key for encryption and decryption. This Java tutorial describes how to encrypt and decrypt files using DES. CipherExample.java package. Cipher and passphrase classes using Java cryptography. Simple Java Encryption/Decryption. Here we learn about how to encrypt and decrypt text string using Java’s cryptography API. The Encryption and Decryption is based on a key/password that’s why its referred as Password Based Encryption(PBE).
It is one of the basic cypher technique. It’s not safe because we need to give client application secure key to decrypt data. Java DES Encryption Decryption Steps. First of all we need to get the Key. Generator instance using DES algorithm. Generate Secure. Key (key) that will be used for encryption and decryption. Get Cipher instance using DES algorithm, one for encrypt mode and another for decrypt mode. Initialize the cypher object using key and Iv. Parameter. Spec object. For encryption, create object of Cipher. Output. Stream using encrypt cipher. For decryption, create object of Cipher. Input. Stream using decrypt cipher. Read the input stream and write to the output stream. Below example first encrypt the file and save encrypted data to new file. Then it decrypts the same file to create the plain text file.
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December 2016
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