Yes, One DSC Can Be Used Across Multiple Portals

• A valid Digital Signature Certificate can be used on various government platforms.
  
• It allows users to authenticate and sign documents on different official systems.
  
• The DSC must be registered individually on each portal where it is used.
  
• Compatibility depends on the certificate’s class and purpose.
  
• Class 2 and Class 3 DSCs are commonly accepted across most services.
  

Registration Required on Each Portal

• Although the same DSC can be reused, it must be registered separately on each site.
  
• User information must match the details stored in the DSC.
  
• Portal-specific validation or mapping is often needed.
  
• DSC registration is typically a one-time process per portal.
  
• After registration, it can be used for all authorized transactions.
  

Common Usage Across Departments

• The same DSC is often used for income tax filing, GST returns, and company compliance.
  
• Professionals may use one DSC for regulatory filings, audits, and certifications.
  
• Organizations can use a single role-based DSC across various procurement and licensing portals.
  
• This reduces the need to maintain multiple certificates.
  
• It simplifies compliance and document management.
  

Compatibility and Validity Considerations

• The DSC must be valid and unexpired during use.
  
• It must include the correct details such as PAN, name, or designation.
  
• It must be supported by the system’s required cryptographic standards.
  
• Using the same DSC across portals saves time and cost.
  
• Any misuse or mismatch may result in rejection or legal issues.
  

Security and Access Control

• The certificate should be stored securely to prevent unauthorized access.
  
• Only authorized users should use the DSC for transactions.
  
• Password protection and physical security of the token are essential.
  
• Loss or compromise of the DSC requires immediate revocation.
  
• Proper management ensures safe multi-portal usage.