// Base64 armouring // source available at http://mindprod.com/products.html#BASE64 import com.mindprod.base64.Base64; ... // sample byte array to encode byte[] toSend = { (byte)0xfc, (byte)0x0f, (byte)0xc0}; // create encoder object Base64 base64 = new Base64(); base64.setLineLength( 72 ); // default // encoding a byte[] String send = base64.encoder( toSend ); // decoding a byte[] byte[] reconstituted = base64.decoder( sent );