这种作为电子邮件加密^{(Email Encryption)}的受保护通信模式变得非常重要，尤其是对于包含敏感信息的电子邮件。但是，当您尝试使用仅具有 3DES 加密功能的证书在Microsoft Outlook中打开加密的电子邮件时，您会收到以下错误消息：基础安全系统找不到您的数字 ID 名称^{(Your Digital ID name cannot be found by the underlying security system)}。首先为什么会出现这个问题以及如何解决它是我们将在这篇文章中学习的内容。

底层安全系统无法找到您的数字 ID名称^{(Digital ID)}

从Outlook内部版本 16.0.8518.1000 开始，Microsoft将默认回退算法从 3DES 升级到AES256。因此，当使用Outlook 16.0.0.8518.1000或更高版本的用户发送加密的电子邮件，并且您尝试使用仅具有 3DES 加密功能的证书打开它时，您会看到错误消息。该错误可能是暂时的，但如果它继续存在，您可以尝试按照以下说明进行修复。

Press Win+R打开“运行^(RUN)”对话框。

在框的空白字段中键入Regedit并按Enter。

当注册表编辑器^{(Registry Editor)}打开时，导航到以下路径地址 -

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security.

接下来，在右窗格中，创建一个新的DWORD 值^{(DWORD Value –)} UseAlternateDefaultEncryptionAlg– 。

双击^{(Double-click)}条目以编辑其值。将其从默认值 0 更改为1。

同样，创建一个新的STRING值– DefaultEncryptionAlgOID。

双击^{(Double-click)}条目以编辑其值。

输入^(Enter)以下值 - 1.2.840.113549.3.7。提供的字符串值显示 3DES 加密算法的OID。

完成后，关闭注册表编辑器^{(Registry Editor)}并退出^(Exit)。

让我们知道这是否有帮助。

Your Digital ID name cannot be found by the underlying security system

This proteсted mode of communication as Email Encryption has become important especially for emails that contain sensitive information. However, when you try to open an encrypted email message in Microsoft Outlook by using a certificate that has only 3DES encryption capabilities, you receive the following error message: Your Digital ID name cannot be found by the underlying security system. Why this issue occurs in the first place and how do you fix it is something we’ll learn in this post.

Your Digital ID name cannot be found by the underlying security system

Beginning with Outlook build 16.0.8518.1000, Microsoft upgraded the default fallback algorithm from 3DES to AES256. So, when the user using Outlook 16.0.0.8518.1000 or later sends the encrypted email message and you try to open it by using a certificate that has only 3DES encryption capabilities, you see the error message. The error can be temporary but if it continues to persist you may try fixing it by following the instructions given below.

Press Win+R in combination to open the RUN dialog box.

In the empty field of the box type Regedit and hit Enter.

When the Registry Editor opens, navigate to the following path address –

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security.

Next, in the right pane, create a new DWORD Value – UseAlternateDefaultEncryptionAlg.

Double-click the entry to edit its value. Change it from default 0 to 1.

Similarly, create a new STRING value – DefaultEncryptionAlgOID.

Double-click the entry to edit its value.

Enter the following value – 1.2.840.113549.3.7. The provided string value shows the OID for the 3DES encryption algorithm.

When done, close the Registry Editor and Exit.

Let us know if this helps.

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