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+
+# Inji Wallet - Key Management Feature
+
+## Overview
+The Inji Wallet supports **RSA, EC R1, EC K1, and ED** keys for signing operations. This document provides a detailed breakdown of the key management process for each key type and its interaction with different system components.
+
+## Supported Key Types 
+- RSA-2048
+- EC R1
+- EC k1
+- Ed25519
+
+---
+
+##  Key Management Flow: 
+
+***RSA & EC R1***
+
+***Android Flow***
+
+```mermaid
+sequenceDiagram
+  participant User
+  participant Inji Wallet
+  participant Secure-Keystore(Android)
+  participant Hardware Keystore
+
+  Inji Wallet ->> Secure-Keystore(Android):EC R1|RSA Keys Generation Request
+  Secure-Keystore(Android) ->> Hardware Keystore:EC R1|RSA Keys Generation Request
+  Hardware Keystore ->> Hardware Keystore:Generate and store EC R1|RSA Keys
+  Inji Wallet ->> Secure-Keystore(Android): Data Signing Request
+  Secure-Keystore(Android) ->> Hardware Keystore: Retrieve EC R1|RSA Keys Request
+  Hardware Keystore ->> Secure-Keystore(Android): Request Authentication
+  Secure-Keystore(Android) ->> User: Request Authentication
+  User -->> Secure-Keystore(Android): Provide Authentication
+  Secure-Keystore(Android) -->> Hardware Keystore: Authentication Success Response
+  Hardware Keystore -->> Secure-Keystore(Android): Return Key Alias
+  Secure-Keystore(Android) ->> Hardware Keystore: Sign Data Request
+  Hardware Keystore -->> Secure-Keystore(Android): Return Signed Data
+  Secure-Keystore(Android) -->> Inji Wallet: Return Signed Data
+```
+
+***iOS Flow***
+
+```mermaid
+sequenceDiagram
+  participant User
+  participant Inji Wallet
+  participant Secure-keystore(iOS)
+  participant iOSKeychain
+  participant SecureEnclave
+
+  Inji Wallet ->> Secure-keystore(iOS): EC R1|RSA Keys Generation Request
+  Secure-keystore(iOS) ->> Secure-keystore(iOS): Generate EC R1|RSA Keys
+  Secure-keystore(iOS) ->> iOSKeychain: Store EC R1|RSA Keys Request
+  iOSKeychain ->> SecureEnclave: Encrypt Keys
+  SecureEnclave -->> iOSKeychain: Encrypted Keys
+  iOSKeychain ->> iOSKeychain: Store encrypted EC R1|RSA Keys
+  Inji Wallet ->> Secure-keystore(iOS): Data Signing Request
+  Secure-keystore(iOS) ->> iOSKeychain: Retrieve Encrypted EC R1|RSA Keys Request
+  iOSKeychain ->> Secure-keystore(iOS): Request Authentication
+  Secure-keystore(iOS) ->> User: Request Authentication
+  User -->> Secure-keystore(iOS): Provide Authentication
+  Secure-keystore(iOS) -->> iOSKeychain: Authentication Success Response
+  iOSKeychain ->> SecureEnclave: Decrypt keys Request
+  SecureEnclave -->> iOSKeychain: Return Decrypted Keys
+  iOSKeychain -->> Secure-keystore(iOS): Return Decrypted Keys
+  Secure-keystore(iOS) ->> Secure-keystore(iOS): Sign Data
+  Secure-keystore(iOS) -->> Inji Wallet: Return Signed Data
+```
+
+
+The RSA and EC R1 keys are directly supported by the android hardware-keystore, hence all cryptographic operations like signing take place there itself.
+For iOS we make use of keyWrapping to store the keys safely in keychain, and use them for necessary operations.
+
+---
+
+***EC K1 & ED***
+
+***Android Flow***
+
+```mermaid
+sequenceDiagram
+  participant User
+  participant Inji-Wallet
+  participant Secure-Keystore(Android)
+  participant EncryptedPreferences
+  participant HardwareKeystore
+  
+  Inji-Wallet ->> Inji-Wallet: Generate EC K1|ED25519 Keys
+  Inji-Wallet ->> Secure-Keystore(Android): Store EC K1|ED25519 Keys Request
+  Secure-Keystore(Android) ->> EncryptedPreferences: Store EC K1|ED25519 Keys Request
+  EncryptedPreferences ->> HardwareKeystore: Encrypt Keys
+  HardwareKeystore -->> EncryptedPreferences: Encrypted keys
+  EncryptedPreferences ->> EncryptedPreferences: Store Encrypted Keys
+  Inji-Wallet ->> Secure-Keystore(Android): Request EC K1|ED25519 Keys For Data Signing
+  Secure-Keystore(Android) ->> User: Request Authentication
+  User -->> Secure-Keystore(Android): Provide Authentication
+  Secure-Keystore(Android) ->> EncryptedPreferences: Retrieve EC K1|ED25519 Keys
+  EncryptedPreferences ->> HardwareKeystore: Decrypt Keys
+  HardwareKeystore -->> EncryptedPreferences: Decrypted Keys
+  EncryptedPreferences -->> Secure-Keystore(Android): Return Decrypted Keys
+  Secure-Keystore(Android) ->> Inji-Wallet: Return Decrypted Keys
+  Inji-Wallet ->> Inji-Wallet: Sign Data
+  Inji-Wallet ->> Inji-Wallet: Return Signed Data
+```
+
+***iOS Flow***
+
+```mermaid
+sequenceDiagram
+  participant User
+  participant Inji-Wallet
+  participant Secure-Keystore(iOS)
+  participant iOSKeychain
+  participant SecureEnclave
+
+  Inji-Wallet -->> Inji-Wallet: Generate EC K1|ED25519 Keys
+  Inji-Wallet ->> Secure-Keystore(iOS): Store EC K1|ED25519 Keys Request 
+  Secure-Keystore(iOS) ->> iOSKeychain: Store EC K1|ED25519 Keys Request
+  iOSKeychain ->> SecureEnclave: Encrypt Keys
+  SecureEnclave -->> iOSKeychain: Encrypted Keys
+  iOSKeychain ->> iOSKeychain: Store encrypted EC R1|RSA Keys
+  Inji-Wallet ->> Secure-Keystore(iOS): Request EC K1|ED25519 Keys For Data Signing
+  Secure-Keystore(iOS) ->> iOSKeychain: Retrieve Encrypted EC K1 | ED25519 Keys
+  iOSKeychain ->> Secure-Keystore(iOS): Request Authentication
+  Secure-Keystore(iOS) ->> User: Request Authentication
+  User -->> Secure-Keystore(iOS): Provide Authentication
+  Secure-Keystore(iOS) -->> iOSKeychain: Authentication Success Response
+  iOSKeychain ->> SecureEnclave: Decrypt Keys
+  SecureEnclave -->> iOSKeychain: Return Decrypted Keys
+  iOSKeychain-->>Secure-Keystore(iOS): Return Decrypted Keys
+  Secure-Keystore(iOS) ->> Inji-Wallet: Return Decrypted Keys
+  Inji-Wallet ->> Inji-Wallet: Sign Data
+  Inji-Wallet ->> Inji-Wallet: Return Signed Data
+```
+
+
+The EC K1 and Ed25519 keys are not directly supported by hardware keystore in android or iOS, hence in both platforms we make use of secure storage areas; encryptedPreferences in android, keychain in ios, with the help of key wrapping.
+
+---