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Simple Certificate Enrollment Protocol (SCEP)

Simple Certificate Enrollment Protocol (SCEP) is a certificate management protocol which is predominantly used for enabling certificate-based authentication. With SCEP, Mobile Device Manager Plus lets you enforce certificate-based authentication for Wi-Fi, VPN, and E-mail configurations on your managed Android devices.
Generally, in large scale organizations, it becomes a cumbersome task for the IT administrator to manually issue client certificates for all the Android devices within the organizational network. SCEP simplifies certificate configuration and distribution by providing a simple and scalable method for handling certificates within organizations.
The major advantages of certificate-based authentication using SCEP are as follows:

  • Zero user intervention since users are automatically authenticated using certificates.
  • Removes the burden of manually configuring user-specific client certificates.
  • Secure network communication as the data is encrypted and authenticated using certificates.
  • Client certificates also function as an additional layer of security by providing two-factor authentication; security threats caused by using unauthorized devices to access business data, or to connect to work related Wi-Fi or VPN networks can be avoided.
  • The device directly contacts the SCEP server to generate the certificate, therefore ensure the SCEP server is reachable from the device. It is not necessary for the SCEP server to be reachable to MDM.
  • Everytime an SCEP profile is reapplied, the CA server generates a new certificate with a new serial number.

Configuring SCEP in MDM

  1. You can verify Server details such as enrollment challenge password from http://<your-server>/CertSrv/mscep_admin and http://<Your-Server>/crtsrv/mscep/mscep.dll.
  2. If the SCEP server is unreachable, try accessing the SCEP server URL in the format http://<your-server>/CertSrv/mscep/mscep.dll from the device. If the URL can not be reached, try accessing the URL after connecting to a local WiFi and then distribute the profile.
Profile Specification Description
SCEP Configuration Name The user-defined configuration name, which is used to refer this configuration in other configurations such as Wi-Fi, VPN etc.,
Server URL The URL to be specified in the device to obtain certificate. Provide HTTP Server URL, if the SCEP server is within the organization network and not exposed to external networks. The certificate is requested through this URL.
For NDES, the server URL format: http://<your-server>/CertSrv/mscep/mscep.dll
Certificate Authority Name Specify the name of the Certificate Authority issuing certificates.
Subject Specify the details(%username%, %email%, %domainname%,%devicename%) to map the corresponding details in the device.
Subject Alternative Name Type Specify the alternate details(RFC 822 Name, DNS Name, Uniform Resource Identifier).
Subject Alternative Name Type Value (Can be configured only if Subject Alternative Name Type is configured) Specify the value for alternative name type.
NT Principal Name Specify the NT Principal Name used in the organization.
Maximum Number of Failed Attempts Number of attempts to obtain the certificate from the CA.
Time interval between attempts Time to wait before subsequent attempts to obtain certificate
Challenge Type A pre-shared secret key provided by the CA, which adds additional layer of security
Enrollment Challenge Password Provide the challenge password to be used.
Key Size Specify whether the key is 1024 or 2048 bits
Use as Digital Signature Enabling ensures the certificate can be used as Digital Signature
Use for Key Encipherment Enabling ensures the certificate can be used as Key Encipherment
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