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BLE 配对3阶段用什么密钥加密?



请问大家,在配对的时候,交换随机数后,就开始加密请求了,

看规范上写的是,主机和从机都使用 STK 加密,

但是,我用 SNIFFER 抓到的数据,用 STK 解密时,只能解密主机发给从机的数据。

从机发给主机的数据不知道如何解!,

 

请高手指点一下~!