Description
BSE mandates trading members to renew the CA certificate used for TLS-encrypted communication with exchange trading systems before March 7, 2026, failing which member applications will be unable to connect.
Summary
BSE is renewing its CA certificate used for TLS-encrypted communication with exchange trading systems. The existing certificate expires in March 2026. All trading members must replace the old CA certificate with the new one in their member applications before March 7, 2026 to maintain uninterrupted connectivity with BSE trading systems across all segments.
Key Points
- The existing BSE CA certificate for TLS communication is set to expire in March 2026
- New CA certificate is mandatory across all segments: Equity, Equity Derivatives, Currency Derivatives, and Commodities Derivatives
- Effective date for mandatory new certificate in production: 7th March 2026
- New certificate available in simulation/test environment from 27th February 2026
- A mock session is scheduled on 7th March 2026 for members to test connectivity
- No changes to connection parameters or member application code are required — only the certificate file needs to be replaced
- The new certificate is common for all segments and is available at www.bseindia.com/nta.aspx
- Member applications that do not update the certificate will fail to connect to BSE trading systems from March 7, 2026 onwards
Regulatory Changes
No regulatory rule changes are involved. This is an infrastructure and security maintenance action — BSE is proactively renewing its TLS CA certificate ahead of its expiry to ensure continuity of encrypted trading channel communications.
Compliance Requirements
- Trading Members / Member Technology Teams must:
- Download the new CA certificate from www.bseindia.com/nta.aspx
- Replace the old CA certificate with the new one in all member applications that connect to BSE trading systems
- Test connectivity using the simulation environment (available from 27th February 2026)
- Participate in the mock session on 7th March 2026 to validate production readiness
- No changes to application code or connection parameters are needed
- Contact BSE Tech Support for assistance: 022-22728053 | bse.tech@bseindia.com
- Contact respective Relationship Manager for queries
Important Dates
| Date | Event |
|---|---|
| 27th February 2026 | New CA certificate goes live in simulation/test environment |
| 7th March 2026 | New CA certificate becomes mandatory in production across all segments |
| 7th March 2026 | Mock session scheduled for members to test connectivity |
| March 2026 | Existing CA certificate expires |
Impact Assessment
Operational Impact: High — Failure to replace the CA certificate before March 7, 2026 will result in a complete loss of connectivity to BSE trading systems for the affected member application. This would prevent trading across all segments (Equity, Equity Derivatives, Currency Derivatives, Commodities Derivatives).
Implementation Effort: Low — The certificate replacement is a straightforward file swap with no code changes or connection parameter updates required.
Scope: All BSE Trading Members — Every trading member using TLS-encrypted connections to BSE must take action. This is not segment-specific; the same certificate applies to all segments.
Risk Mitigation: BSE has provided early notice and a phased rollout with simulation environment access from February 27 and a mock session on March 7 to minimize disruption to live trading on Monday, March 9, 2026.
Impact Justification
Mandatory technical action required by all trading members across all segments by March 7, 2026. Non-compliance results in complete inability to connect to BSE trading systems, making this operationally critical.