NDSU Lunchbytes "Are They Really Who They Say They Are?" Digital or Electronic Signature Information Rick Johnson, Theresa Semmens, Lorna Olsen April 24,

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NDSU Lunchbytes "Are They Really Who They Say They Are?" Digital or Electronic Signature Information Rick Johnson, Theresa Semmens, Lorna Olsen April 24, 2006

Electronic/Digital Signatures More than one definition: 1.Can be used to sign a document (i.e., contract) - Person 2. Can be used to authenticate a secure Website or to send secure messages ( – Business Web site

Digital Signature A way to ensure whether a message was actually sent by the person who claimed to have sent it. The sender's private key encrypts the signature, and the recipient decrypts the signature with the sender's public key. Digital signatures use public key cryptography and work in conjunction with certificates

Digital Certificate A digitally signed (Digital Signature) statement that binds the identifying information of a user, computer, or service to an encryption algorithm. A digital certificate is commonly used in the process of authentication and for securing information on the networks Examples: Verisign, GeoTrust, Thawte

Digital Certificate Is issued by a Certificate Authority Certifies the person and particular Web site are connected Increases confidence and trust from the user

Digital Certificate Example: A digital certificate verifies to the shopper the online store is actually associated with a physical address and phone number – increases shopper’s confidence in merchant’s authenticity.

Certificate Authority In cryptography, a certificate authority or certification authority (CA) is an entity which issues digital certificates for use by other parties. It is an example of a trusted third party. Examples: GeoTrust, Verisign, Thawte