Hello, here I am providing you the details of the certifications you may do for the Red Hat Certified Security Specialist as under:

Certifications one may do:
Red Hat Certified System Administrator (RHCSA)[edit]
Red Hat Certified Engineer (RHCE)
Red Hat Certified Architect (RHCA)
Red Hat Certified Virtualization Administrator (RHCVA)
JBoss Certified Application Administrator (JBCAA)

Prerequisites
To be an RHCSS, one should earn RHCE credential.
Current RHCEs will obtain RHCSS certification upon successfully passing all the three expertise exams.
All the expertise exams are performance based.

Duration of the courses:
4 to 20 days

Course objective:
Comprehend Threat Model
Comprehend Service Security
Comprehend Protection Methods
Comprehend Intrusion Recovery and Detection
Comprehend FTP
Comprehend Electronic Mail with Sendmail
Comprehend LDAP directory
Comprehend Authentication and security
Comprehend vCentralized user authentication with LDAP
Comprehend Apache security
Comprehend Network Authentication RPC NIS and Kerberos
Comprehend directory services
Comprehend NTP and Logging
Comprehend Network File System
Comprehend DNS and BIND Security
Comprehend LDAP and Kerberos
Comprehend Cross-platform centralized identity management
Comprehend User Security
Use SELinux
Comprehend Anatomy of a Policy