HP Ew2400 HP Jetdirect Print Servers - HP Jetdirect and SSL/TLS - Page 17
Certificate Authority
UPC - 882780301306
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Jack Create Key Pair Jack's Public Key Jack's Private Key Identity Info + CA's Public Key Jack Jack's Private Key (Stays Private) Jack's Public Key Certificate Request Certificate Authority CA's Private Key (Also performs Identity Verification on Jack) Identity Info + CA Info + Jack's Public Key Preliminary Certificate Identity Info + CA Info + One-Way Function/Hash Function Jack's Public Key CA's Digital Signature Jack's Public Key Certificate Encryption Figure 19 - Certificate Authority Jack goes through a key pair generation process and creates a public and private key pair. The private key is kept secret. The public key is associated with some identity information and is given to a Certificate Authority. The certificate authority generates a certificate, usually specific to a purpose such as email, and signs the certificate with its digital signature. Assuming there is a place where these digital certificates are publicly available, as long as Jack and John can agree to trust a specific certificate authority, they'll be fine trusting certificates signed by that authority. Refer to Figure 20. 17