Secure Authentication Using Graphical Password IOS

An iOS login that uses a picture puzzle as the password. The chosen picture is split into a 3×3 grid shown scrambled, and the user must select the tiles in the original order.

The user signs in to the iOS app. SwiftUI screens collect input and display results. Data is stored in Firebase or Core Data. Notifications keep the user updated.

UIKit is the older imperative framework where views are created and updated in code or storyboards. SwiftUI is declarative: you describe the UI for a given state and the framework updates it when the state changes.

Symmetric encryption (AES, DES) uses one shared key for encryption and decryption and is fast. Asymmetric encryption (RSA) uses a public key to encrypt and a private key to decrypt, which solves key sharing but is slower.

A hash is one-way, so even the administrator cannot recover the password. We add a random salt and use a slow hash such as bcrypt so stolen hashes are hard to crack.

We followed an iterative (incremental) model: requirements and a basic design first, then modules built and tested one by one, with the guide's feedback after each review. It suits a project where requirements become clearer as we build.

Unit testing of each module, integration testing of the complete flow and system testing with real inputs. Test cases with expected and actual results are listed in the report, including invalid inputs.

The current version is tested on a limited dataset or number of users. Future work includes deploying on the cloud, adding more features or languages, improving accuracy with more data and building a mobile version.