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Skype 支持私人消息。看起来它的私人消息是使用信号协议加密的。

我有这个 Skype 私人消息样本，需要解密“内容”。

 "clientmessageid": "10507111498039774744",
        "messagetype": "EndToEndEncryption/EncryptedText",
        "originalarrivaltime": "2020-01-27T05:53:17.571Z",
        "encryptedkey": {
            "d79ee36f-a499-49b7-ac9d-6091362e141a": "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"
        },
        "version": "1580104398186",
        "fromdeviceid": "aee59f97-e1e9-4561-af80-4a0b4c6f2156",
        "from": "https://azwcus1-client-s.gateway.messenger.live.com/v1/users/ME/contacts/8:prakash.tandukar",
        "id": "1580104398186",
        "conversationLink": "https://azwcus1-client-s.gateway.messenger.live.com/v1/users/ME/conversations/19:cd600a6ac9fd0fc43098250d506519ea3fae996a9ab5ed32b81734696b6e8325@encrypted.skype",
        "type": "Message",
        "conversationid": "19:cd600a6ac9fd0fc43098250d506519ea3fae996a9ab5ed32b81734696b6e8325@encrypted.skype",
        "content": "UVpLGf93DMdW5sNpO+XnHp7xHpq5LtgZM/TcvxE9nT8M7ElyNiOVQWGB933cw/Cn",
        "composetime": "2020-01-27T05:53:17.571Z"

内容已加密。还有加密密钥。我一直在寻找用于在 c# 中解密内容的 signal-protocol-pcl 包，但无法解密内容。

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