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About SSL

Enhancement of data transfer safety level and the growth of the SSL technology is due to the increasing number of online transactions.

Daily used, the SSL protocole is totally transparent and works without any manipulation from the webuser.

What is it ? How does it work ?

What's SSL ?

Developed by Netscape, the SSL (Secure Socket Layer) or TLS (Transport Layer Security), is a protocole used to secure online transactions.

It has several missions:

How does it work?

The SSL protocole creates a communication channel between a client and a server independently from the protocole, it secures online transactions (HTTP protocole) as well as FTP, IMAP or POP protocoles connexions.

That communication channel is an opaque tunnel that prevents anybody to see the content of the transaction.

In a schematic way:

No SSL cert - non-secured data transfer

Non-secured tranfer, no SSL certificate: A see-through communication tunnel, information can be seen by anybody.

SSL cert : secured data transfer

SSL-secured transfer:
opaque communication tunnel.
Data cannot be seen.

It can be compared to the mechanism of a lock (public key) and its key (private key):

The privet key is saved on the server.
The public key, known by anybody encrypts sending datas, that are decoded on the server by the privet key.

What's a digital certificate ?

A SSL certificate is a digital ID whose goal is to identify the owner of a server, a website or an Email address.

It is issued by a trusted third part called a certification authority, such as Thawte, that testifies the certificate's owner identity.

The server certificate

To make the SSL security work (for online transactions for example) a server certificate is required.

A server certificate carries:

What does the webuser see

When surfing, a webuser can see information about websites on the address bar.

On Firefox 3:

Firefox 3 discerns 5 kinds of websites according to the information they deliver. Each kind owns its proper warning alert:

Server Client certificate

The Server Client certificate is not a common product. Securing a machine, it enables a server to authenticate itself to an other server, equiped with an SSL certificate as well. The authenticated server is then assimilated to a client.

This certificate can be used for ACTES (an e-procedure).

Document Server Stamping RGS* / RGS** certificate

Document Server Stamping certificate authenticate a machine that can be used for documents dematerialization such as invoices or pay-slips.

This certificate seals data and guarantees its integrity and authenticity.

This certificate can be used for Prodou@ne.

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Last modified: 28 June, 2017
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