One of the primary facets for not having end-to-end encryption for groups is the need for accountability and responsibility.

When a group chat is end-to-end secured, messages are essentially unobservable to the platform owner, making it difficult for 电报 下载 them to moderate the chat. This can lead to issues like harassment or incivility, which Telegram aims to prevent.

Telegram needs to balance individual users' right to privacy with the need to ensure a respectful community. To achieve this, the platform uses a combination of end-to-end encryption and server-side encryption. This means that messages are encrypted end-to-end between users, which helps ensure that only they can read the content. However, the metadata, such as who sent a message and when, is kept on the servers, allowing Telegram to moderate and handle chats if necessary.

Another factor for not having end-to-end encryption for groups is the need to provide services like editing, deletion, and recall of messages. Since end-to-end encryption encrypts messages the moment they leave the sender's device, it can't allow Telegram to keep track of message edits or deletions. By keeping the metadata on the servers, Telegram can provide features like editing and recall, which are highly valued by users.

In addition, the setup required for end-to-end encryption in all types of chats would be significantly different. This may require additional resources, technology, and capacity, which would be a significant challenge. Telegram would need to redesign its entire architecture to accommodate the demands of end-to-end encryption in all chats.

While this may seem counterintuitive, Telegram has consistently demonstrated its commitment to user security and privacy. The platform offers Digtal Security Number, where users can log in to Telegram account using their mobile number. The message encryption between users uses AES 256 symmetric encryption and the elliptic curve Diffie-Hellman (ECDH) key exchange algorithm, which provide high levels of safety.

In conclusion, while end-to-end encryption in all types of chats would be attractive, it's not possible from a technical, practical, and pragmatic standpoint. Telegram has to balance individual users' right to privacy with the need to ensure a respectful community. The platform continues to innovate and upgrade its security features, going beyond simply enabling end-to-end encryption for all chats.