#开源项目
#sqlite
WCDB，微信基于sqlite实现的嵌入式数据库（各类微信终端上的聊天记录应该都是用这个数据库存储的），在sqlite基础上做了不少功能的增强。
《五年沉淀，微信全平台终端数据库WCDB迎来重大升级！ 》
BY codedump的电报频道
Telegram has made it easier for its users to communicate, as it has introduced a feature that allows more than 200,000 users in a group chat. However, if the users in a group chat move past 200,000, it changes into "Broadcast Group", but the feature comes with a restriction. Groups with close to 200k members can be converted to a Broadcast Group that allows unlimited members. Only admins can post in Broadcast Groups, but everyone can read along and participate in group Voice Chats," Telegram added.
Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.
telegram from it