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Java I/O Q&A » Operation » encrypt 

1. How to encrypt a string/stream with bouncycastle pgp without starting with a file    stackoverflow.com

I need to encrypt a stream with pgp using the bouncycastle provider. All of the examples I can find are about taking a plain text file and encrypting that however ...

2. Encrypting sensitive application data in Java    stackoverflow.com

I'm currently assessing a project where highly sensitive personal information is handled thus it needs to be encrypted. We are talking like several 100 megabytes of multimedia files, like MP3 or ...

3. Cryptanalysis: XOR of two plaintext files    stackoverflow.com

I have a file which contains the result of two XORed plaintext files. How do I attack this file in order to decrypt either of the plaintext files? I have searched ...

4. Encrypting a big file    stackoverflow.com

I have a database created. Administrator program creates a file with all approximately 6000 products. This file must be shared with other client programs. I want that my administrator program upload ...

5. how to encrypt give file    coderanch.com

6. the encrypted file is cutted shortter    coderanch.com

hello my code as following: public class EncryptHandler { public EncryptHandler() { } public SecretKey genKey() { try { KeyGenerator kg = KeyGenerator.getInstance("DESede"); kg.init(168); SecretKey key = kg.generateKey(); return key; } catch (Exception e) { e.printStackTrace(); System.exit(-1); return null; } } public SecretKey readKey(String path) { try { FileInputStream fin = new FileInputStream(path); int num = fin.available(); byte[] keykb = new ...

7. java code to encrypt a file    coderanch.com

import java.io.*; import java.io.FileInputStream; import java.security.InvalidKeyException; import javax.crypto.CipherOutputStream; public void encryptfile(File in, File out){ public static void main(String args[]) throws IOException, InvalidKeyException{ try{ aesCipher.init(Cipher.ENCRYPT_MODE, aeskeySpec); File in=new File("d:\\keystore.ks"); FileInputStream is = new FileInputStream(in); CipherOutputStream os = new CipherOutputStream(new FileOutputStream(out), aesCipher); copy(is, os); os.close(); } //try catch(IOException e){e.printStackTrace();} catch(InvalidKeyException ei){ei.printStackTrace();} } //main }

9. How To Encrypt JavaBean    coderanch.com

My mail program stores data in a JavaBean which includes email contacts, host name etc. The JavaBean is serialized and written to a file. I want to be able to keep the data more private. Which is the best method to encrypt the data file without the user having to input a password each time the program starts up. ObjectOutputStream obOutput ...

10. Is file encrypted    coderanch.com

Hello All, Is there any way to find if the particular file instance is encrypted or not. One solution what I had was to decrypt and check if the exception is thrown else continue. But it would be an overhead for users not using encryption. Please help on alternatives . Thanks !

11. Best way to solve this encryption file handling problem.    java-forums.org

Hi all, I'm writing a simple encryption algorithm and have stumbled upon a problem relating to the file handling itself. What my program does is reads text from a file, encrypts it, and writes it to another file. That's all well and good, and it works fine - until a large file is used for input. I tested it with a ...

12. Encrypt Picture or other files    java-forums.org

Hello people, I know java for long time now. I had created a encrypt program that encrypt and decrypt TEXT files with my own (not using java's library) algorithm. Now what i need is to encrypt pictures, pdf, rich texts/MS Word files. How can i encrypt these files? As I knew all the files in the computer is present in binary ...

14. Encrypting a file using PGP in java    forums.oracle.com

I have tried both the binary and source version.I am using a Windows 2000 platform with Java SDK 1.4.2. I kept them in my source folder where i kept my code. I am getting the below exception message after running my pgm. Exception in thread "main" java.lang.UnsatisfiedLinkError: no pgpi in java.library.path at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1682) at java.lang.Runtime.loadLibrary0(Runtime.java:822) at java.lang.System.loadLibrary(System.java:992) at PGPi.(PGPi.java:247) at PGPEncryptionFile.main(PGPEncryptionFile.java:6) ...

15. Encrypting a file using RSA...    forums.oracle.com

16. Need to create Digital Signature & Encrypt the File    forums.oracle.com

Hi Experts, I have an requirement, I need to create a module in which I need to pass four values (Namely signing key, signing algorithm, encyption key and encryption algorithm) through parameters as inputs. Based on these parameters, I need to create the signature for the input xml file and I have to encrypted the file. Please Guide me. Give some ...

17. File Encrypted or Decrypted    forums.oracle.com

18. File encryption using Java?    forums.oracle.com

Greetings, I'm going to be designing a batch script in java that will pull files from an FTP, build them into a database, and then store them on a server. I'm going to design the batch in Java, but once the files are stored on the server they will need to be encrypted. What kind of possible ways are there to ...

19. How can I encrypt files with java ?    forums.oracle.com

I don't want others to see the content of my file.so,i try to encrypt the file. but i don't know how to do .i think there may be two ways to do that .one is coding the file with some encrpytion tachniques .Another is try to add a locker to the file ,when someone try to read it ,the trigger is ...

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