Identity Vault 5.0 is the latest version of Ionic's mobile biometrics solution, designed to enhance frontend security in Ionic apps by facilitating secure biometric authentication. This update addresses concerns from enterprise teams about frontend security vulnerabilities, particularly the risk of data loss and unauthorized access if authentication tokens are compromised. Identity Vault 5.0 integrates multi-layer native security and best practices for on-device authentication data storage, offering features like native security to prevent data from leaving the device, encrypted storage, and compatibility with various authentication providers. It introduces a simpler API, better compatibility with React, Vue, and plain JavaScript, and flexible Android biometric options, allowing developers to choose their risk tolerance by supporting both Class 3 and Class 2 biometrics. The update also includes an enhanced local development experience with the BrowserVault class, which supports web development environments, and a VaultMigrator class to transition data from version 4 to version 5. Overall, Identity Vault 5.0 aims to ensure secure mobile applications by using the latest security practices, offering ease of integration, and providing ongoing support and updates.