SSL certificate
Contains the certified names, public key, issuer and expiry information. The matching private key stays protected with the administrator.
Plan your first certificate SSL guides & resources
Understanding SSL certificates, TLS and HTTPS
Start with what the certificate does, then decide which website names and identity checks your organization needs.
Three terms, one secure connection
Understand the role of each part before comparing products.
TLS
The protocol authenticates the connection and protects information travelling between its endpoints. Protocol and server configuration still matter.
HTTPS
The secure form of HTTP used by websites. A valid certificate must be deployed on the endpoint visitors actually reach.
What HTTPS protects
Use HTTPS alongside the other controls that keep your website and organization secure.
Data travelling to the site
TLS helps protect information such as form submissions while it travels over the connection. It does not replace access control, secure application code or backups.
The connection’s identity
Certificate checks connect a trusted certificate to the requested hostname. HTTPS alone does not prove that a business, download or page content is trustworthy.
Coverage and validation are separate choices
First list the exact names. Then choose the identity checks required for your purchase.
Choose the names
Single-domain, wildcard and multi-domain describe different coverage. Check the published product details for root/www inclusion, subdomain depth and additional names.
Compare coverage 
Choose the identity checks
DV checks domain control. OV adds organization checks; EV applies more extensive organization verification. These labels are not an encryption-strength ranking.
Explore organization validation What happens when someone opens your site
A simplified view of a TLS connection.
The browser connects
The browser requests the website and the server presents its certificate.
Certificate checks take place
The browser checks the name, validity and trust chain. A certificate problem can prevent a trusted connection.
Protected communication begins
After the handshake establishes connection keys, application data travels over the protected session.
Ready to choose SSL for your website?
Compare current certificate options and BDT subscription totals. If your office needs a formal offer, share its website names, requirements and requested date.
Request a quotation Common questions
Are SSL and TLS the same thing?
TLS is the modern protocol. SSL is the older name still commonly used for certificate products; use supported TLS configurations on the server.
Do I need a paid certificate for HTTPS?
Free domain-validated options exist. Compare operational support, required organization validation, hosting compatibility and purchasing needs before choosing. A paid certificate is not automatically stronger encryption.
Does HTTPS guarantee a higher Google ranking?
No. A certificate is part of a functioning secure website, not a ranking or traffic guarantee. Keep your content useful and your site accessible.
Where should a Bangladesh government office start?
Use the Government Desk for office requirements and formal quotation preparation. The certificate still has to match the website names and required CA validation.