![]() ![]() Telegram is an open-source app and anyone can review its source code, protocol and API. The encryption algorithms are RSA 2048/AES 256/SHA-256 (SHA-1 has been removed for its insecurity). In Telegram's secret chats, the end-to-end encryption layer is added. ![]() Standard chats use server-client encryption, although it is very robust. This application also uses end-to-end encryption for its communications, but not in all its chats, only in secret chats. It currently has more than 500 million users around the world. Telegram is WhatsApp's main competitor due to the similarity of its functionalities. WhatsApp has some privacy options such as hiding your username, login time, profile picture, information and status and has two-step verification and fingerprint unlock option. The metadata it collects are IP addresses, contacts, network operators, dates of use, location, phone model and device ID. ![]() It is noteworthy the large amount of data associated with your account that it requests: phone number, user ID, contacts, email, device ID, approximate location, advertising data, purchase history and payment information, product interaction, bug and performance reports, and customer support. The cryptographic algorithms used are Curve25519/AES-256/HMAC-SHA256. This cryptographic system protects messages so that only the sender and receiver can read them and no one else, not even the application itself. It uses end-to-end encryption in all its chats, both individual and group. WhatsApp has more than 2 billion users worldwide. We have discarded applications such as iMessage or Google Messages because they are exclusively for iPhone and Android users, respectively, and other less relevant minority applications for this comparison. Given the situation, in this article we will look at the main differences in terms of security and privacy that exist between the green app, Telegram and Signal. ![]()
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