HP 250m Print Server - Fast Ethernet manual Digital Signature Verification

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Figure 18 - Digital Signature Verification

Here we see how John uses Jack’s public key to verify the message. Jack’s public key is the only key that can decrypt the digital signature and obtain the hash value of the message that Jack calculated before sending the message. Because the hash was encrypted with Jack’s private key, which no one should know but Jack, John can be sure that Jack was the one that sent it.

We still have a problem – How does John know that Jack’s public key really belongs to the person that he knows as “Jack”? There are many people in the world named “Jack” – how does John know it isn’t one of them? We still need a trusted third party to provide Jack’s public key in a format John can trust and we probably need Jack to provide a little more identity information too. Here is where the Certificate Authority comes into play. Refer to Figure 19 – Certificate Authority.

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Contents Whitepaper IntroductionWhat is SSL/TLS? Http ApplicationHttps Decoded Application ChangesHttp Session More Info Https Session Lock Icon Certificate Details Digital Certificates IE6 Security AlertIE7 Certificate Error IE7 Certificate Error Public Key Infrastructure and Public Key Certificate Basics Certificate InformationSymmetric Cryptography Asymmetric Cryptography Digital Signature Digital Signature Verification Certificate Authority Public Key Certificates Self-Signed Certificate SSL/TLS Protocol Basics SSL/TLS Protocol StructuresClient Hello Server Hello Server Certificate Verification Keying Material Client Finished Using Https with HP Jetdirect Server FinishedCA Heirarchy Network Diagram Page Page Under the heading Jetdirect Certificate, press Configure… Page Page Page Page Page Page Page Page Page Page Page Save it Go to Tools and click Internet Options Click Certificates Click Import… Click Next Select the file Click Next Page Page Page Page Page Detailed Look at the SSL/TLS Connection Page Page Page Page Check for server certificate revocation is not selected Page Page SSL/TLS Server Settings HP Jetdirect as an SSL/TLS Client Page Page Page Page Select R2 and hit Export… Click Next Select DER. Click Next Save it Save it Click Finish Page Select the file. Click Finish Click OK Page Same message. What did we do wrong? Page Page We use the DNS name and try again Success Page SSL/TLS Client Understanding Certificate Chains CA HierarchyPage RootCA Incorrect HP Jetdirect CA Configuration Correct HP Jetdirect CA Configuration Walking the Chain SSL/TLS Client Certificates and Name Verification Subject SubjectAltName Page Page Page IPP over SSL/TLS Click Next Select a network printer… Page Page Print a test Yep we have our print data protected by SSL/TLS HP Jetdirect Certificate Guidelines Embedded Devices and Digital CertificatesWhich HP Jetdirect Products Support SSL/TLS? Summary