What is Two-Way SSL?
Two-way SSL(Secure Socket Layer) is a high-security protocol that provides confirmation of identity and encryption for transactions made over the Internet. Two-way SSL differs from standard SSL by confirming not only the identity of a website server, but also the identity of the client.
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How Two-Way SSL Works
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Both the web server and the client must have SSL certificates issued by an authorized certificate authority. The certificate includes a digital signature confirming the identities of the web server and the client. When the client's computer sends a request to the web server website, the web server will verify that the client has an SSL certificate and vice versa.
Costs
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SSL certificates can cost anywhere between $10 to more than $1,000 a year, depending on your needs. The level of encryption, validation level, speed of issuance and customer support all have an impact on the price of the certificate. Prices will also vary between the different certificate providers.
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Uses
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Two-way SSL is used when the web server sends highly-sensitive information to the client and needs to verify his identity, such as in the case of a company server who only wishes to communicate with business partners. In a typical online store, two-way SSL in not a necessity, since only the client wishes to know the identity of the server. Since he is the one sending sensitive information, such as credit card numbers.
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