Description
BSE's CA certificate for TLS-encrypted trading channel communication expires in March 2026. All trading members must replace the old certificate with the new one before 7th March 2026 to maintain connectivity.
Summary
BSE has announced the renewal of the CA certificate used for TLS-encrypted communication between member applications and the exchange trading system. The existing certificate is set to expire in March 2026. All trading members must update their applications with the new CA certificate before 7th March 2026 to avoid disruption to trading operations. The new certificate applies uniformly across all segments and is available on the BSE website.
Key Points
- The CA certificate for TLS communication with BSE trading systems is expiring in March 2026
- New CA certificate will be mandatory across all segments effective 7th March 2026
- Segments affected: Equity, Equity Derivatives, Currency Derivatives, and Commodities Derivatives
- Member applications that do not update the certificate will be unable to connect to BSE trading systems from 7th March 2026
- No changes are required to connection parameters — only the certificate needs to be replaced
- New certificate is common for all segments and is available at www.bseindia.com/nta.aspx
- New certificate will be applicable in the test/simulation market from 27th February 2026
- A mock session will be conducted on 7th March 2026 to allow members to test connectivity
Regulatory Changes
No regulatory rule changes are introduced. This is a technical infrastructure renewal mandated by BSE to maintain secure TLS-encrypted communication. The exchange will upgrade its systems to accept only the new CA certificate from 7th March 2026 onwards.
Compliance Requirements
- Trading members must download the new CA certificate from www.bseindia.com/nta.aspx
- Replace the old CA certificate in member applications with the new certificate before 7th March 2026
- Test connectivity using the simulation environment (available from 27th February 2026)
- Participate in the mock session on 7th March 2026 to validate connectivity before live trading resumes on Monday
- Contact BSE Tech Support for queries: 022-22728053 or bse.tech@bseindia.com
Important Dates
| Date | Event |
|---|---|
| 27th February 2026 (Friday) | New CA certificate applicable in test/simulation market |
| 7th March 2026 (Saturday) | New CA certificate mandatory in production across all segments; mock session scheduled |
| March 2026 | Old CA certificate expiry deadline |
Impact Assessment
This change has high operational impact on all trading members connected to BSE. Members who fail to update the CA certificate before 7th March 2026 will experience complete loss of connectivity to BSE trading systems, preventing them from trading in any segment. The impact is broad — covering Equity, Equity Derivatives, Currency Derivatives, and Commodities Derivatives segments. However, the technical effort required is minimal: only the certificate file needs to be replaced with no changes to application logic or connection parameters. BSE has provided advance notice and a phased approach (simulation first, production on 7th March) to minimise disruption.
Impact Justification
Critical infrastructure change affecting all trading members across all segments — failure to update the CA certificate before 7th March 2026 will result in complete loss of connectivity to BSE trading systems.