CS6238: Secure Computer Systems – Secure Shared Store (3S) - IT Assignment Help

Assignment Task:

Task:

Goals & Assumptions
This project is based on the topic of distributed systems security that is covered in Modules 11 and 12. The goal of the project is to gain hands-on experience in implementing secure distributed services. You will develop a simple Secure Shared Store (3S) service that allows for the storage and retrieval of documents created by multiple users who access the documents at their local machines. In the implementation, the system should consist of one or more 3S client nodes and a single server that stores the documents. Users should be able to login to the 3S server through any client by providing their private key as discussed in Module 12. Session tokens would be generated upon successful authentication of the users. They can then check-in, checkout and delete documents as allowed by access control policies defined by the owner of the document.

To implement such a distributed system, we will need to make use of certificates to secure the communication between clients and the server, and to authenticate sources of requests. You will need to make use of a Certificate Authority (CA) that generates certificates for users, client nodes and the server. All nodes trust the CA.

Project Setup
We have provided a Virtual Machine for the project. Links to download the image (.ova file) will be postedon piazza.
The default account on the VM is cs6238 and the password is cs6238. The root password is also cs6238. In an ideal setting, the 3S server and the client would be on separate nodes. For simplicity, we have set up only one VM. The server and client nodes are abstracted as separate folders within the VM. For example, the server folder represents the server and the client1 folder represents the client node.
The desktop contains a Project4 folder which has the skeletal implementation of the 3S service. You will be required to complete the implementation to satisfy all the functionalities which will be detailed below. The

Project4 folder contains:
1. CA - Represents the Certificate Authority and contains the CA certificates
2. server - Represents the server. It contains server certificates and the 3S application code. The 3S server is implemented using Python Flask and server.py contains the outline of the server code which is to be fully completed.
3. client1 - Represents one of the client nodes. client.py has the skeletal implementation of the client. You will be required to generate client certificates and place them in the client1/certs folder.
4. client2 - Represents another client node and the environment should be similar to client1.
5. Testing Tools - Contains a sample testing script to present an idea of how your client must accept inputs.

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