Chat and Message Data (End-to-End Encrypted and Primarily Local):

[badsha0018]

Conceptual Organization: This data would likely be stored in relational databases with tables for users, profiles, settings, and devices, linked by user identifiers.


WhatsApp manages users' contact lists, which are typically synced from the device's address book:

Contact List: Mappings between the user's account and the phone numbers of their contacts.
Contact Names: The names users have assigned to their contacts in their phone's address book.
WhatsApp User Status: Information indicating which of the user's contacts are also WhatsApp users.
Conceptual Organization: Tables linking user IDs to contact india whatsapp mobile phone number list phone numbers and associated names.


This is the core of WhatsApp's functionality, but due to end-to-end encryption, the content is primarily stored locally on user devices:

Message Content: Text messages, voice notes, photos, videos, documents, and stickers. These are encrypted and stored on the sender's and recipient's devices. WhatsApp servers handle the transmission but do not have access to the decrypted content.
Message Metadata: Information about messages, such as sender ID, recipient ID(s), timestamp, delivery status, read status. This metadata is necessary for message delivery and management.