Yes. Web services published using Boomi can be configured to authenticate using client certificate authentication (a.k.a. mutual authentication or two-way SSL authentication). In Manage > Atom Management > select Atom > Shared Web Server > Authentication Settings, choose "Client Certificate" (API Type must be set to Intermediate or Advanced). Then on the Shared Web Server > User Management tab, select a public certificate to associate with each user.
For more details please see Shared Web Server panel.
On a related topic, to invoke a remote web service that uses client certificate authentication using the Web Services SOAP Client connector or HTTP Client connector, see:
Note that Client Certificate Authentication is NOT currently available in the Dell Boomi Atom Clouds.
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