creat a secure file sharing system using Java security packages such as

Java Cryptography Architecture

$($

JCA

$)$

$$and Java Cryptography Extension

$($

JCE

$)$

$.$

$$The system

should have the following features:

$1$

$.$

$$Authentication: The system should require users to authenticate themselves before

accessing any files. Users could be authenticated using a username and password or

other secure means.

$2$

$.$

$$Encryption: The system should encrypt files before they are stored on the server, and

decrypt them when they are requested by authenticated users.

$3$

$.$

$$Secure communication: The system should use secure communication protocols, such

as SSL

$/$

TLS

$,$

$$to ensure that all communication between the client and server is

encrypted. encryption and decryption using the DES $($Data Encryption Standard$)$ algorithm in CBC $($Cipher Block Chaining$)$ mode with PKCS$5$Padding padding.