---
title: vPromotions Secure Encryption
description: vPromotions employs very secure SSL (Secure Sockets Layer) encryption using RSA public key encryption with keys stored on a separate server from the encrypted information.  SSL is a standard security
---

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# vPromotions Secure Encryption

vPromotions employs very secure SSL (Secure Sockets Layer) encryption using RSA public key encryption with keys stored on a separate server from the encrypted information. 

SSL is a standard security technology for establishing an encrypted link between a server and a client—typically a web server (website) and a browser; or a mail server and a mail client (e.g., Outlook). It allows sensitive information such as credit card numbers, social security numbers, and login credentials to be transmitted securely. To establish this secure connection, the browser and the server need an SSL Certificate.

## How SSL Uses both Asymmetric and Symmetric Encryption

Public Key Infrastructure (PKI) is the set of hardware, software, people, policies, and procedures that are needed to create, manage, distribute, use, store, and revoke digital certificates. PKI is also what binds keys with user identities by means of a Certificate Authority (CA). PKI uses a hybrid cryptosystem and benefits from using both types of encryption. For example, in SSL communications, the server’s SSL Certificate contains an asymmetric public and private key pair. The session key that the server and the browser create during the SSL Handshake is symmetric. This is explained further in the diagram below.

![SSL\_.png](https://vcreativeinc.com/hubfs/Knowledge%20Base%20Import/SSL_.png)

1. Server sends a copy of its asymmetric public key.
2. Browser creates a symmetric session key and encrypts it with the server's asymmetric public key, then sends it to the server.
3. Server decrypts the encrypted session key using its asymmetric private key to get the symmetric session key.
4. Server and Browser now encrypt and decrypt all transmitted data with the symmetric session key. This allows for a secure channel because only the browser and the server know the symmetric session key, and the session key is only used for that session. If the browser was to connect to the same server the next day, a new session key would be created.

 This is the means by which sensitive data is stored in vPromotions safely and securely.

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