Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Certification Kittiphan Techakittiroj

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Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Certification Kittiphan Techakittiroj

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Signature & Certification Identification –something the person knows, e.g. password –something the person has, e.g. ID card –something the person is, e.g. fingerprint

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Signature & Certification To verify who is who. Put identification in the electronics form make it difficult to create one without permission

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Signature public key algorithm use private key to encrypt your information: usually short information make public key (for decryption) available for everyone –can be sent with the message people who get message know it from “you” Digital Signature & Certification

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Benefit Major –Confidentiality: encrypted –Data Integrity: software signature Minor –Authentication: guarantee the encryption source, not the person who encrypt –Non-repudiation: can be done after authentication Digital Signature & Certification: Digital Signature

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Digital Certification third party to certify your information using the public key method only authority can encrypt information decryption key are available: can also sent with encrypted data authority need to be trusted by others Digital Signature & Certification

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Example Digital Signature & Certification: Digital Certification

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Category Certificate Authority certificate Individual Certificate: for person, company Server Certificate: for server Software Publisher Certificate: to verify the integrity of the software Digital Signature & Certification: Digital Certification

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Standard: X.509 Digital Signature & Certification: Digital Certification owner’s public key owner’s name attributes associated with owner: e.g. name of encryption algorithm issuer or signer expiration date

Kittiphan Techakittiroj (24/08/58 22:49 น. 24/08/58 22:49 น. 24/08/58 22:49 น.) Reference Books Developing Secure Commerce Applications by Online O’Reilly Web Development Courses ( 1999) Client/Server Survival Guide by Robert Orfali, Dan Harkey, Jeri Edwards (John Wiley & Sons: 1999)