Session 64

Digital SignaturesPresented by:

Bob Peterson, P.E.Engineering Technology Systems

Obtain Certificate• PKI Technology – Private key vs. Public key• Class 2 certificate

– Verification of identity (Certificate Authority)– “This is me”

• Token vs. Computer– Token is portable and provides two-part security

(physical token and password)– Computer storage uses window login password

• Where to get certificate?– Verisign, Digitrust, Adobe affiliates, Usertrust

• http://certificate.usertrust.com/UDOTEngineer

Create Signature Cell Library

• Follow directions found in “Signature Cell Creation.pdf” file

• Caution – If you lose your certificate, you will lose your cell library

Digital Signature Process for Construction Plans

Types of Signatures • Plan sheet signature

– Make sure all signatures are valid when assembling final set

– Do not change any files (turn off save settings on exit)

• Title Sheet or Cover Sheet– Multiple signatures – only add signatures to

avoid invalidating previous signatures• Adobe Signature

– Udot.pen creation of signature fields– Reader accessible file

Resource Locations

• UDOT– M:\Cadd_Apps\Signature_Tokens\

• Consultants and Contractors– ftp://ftp.dot.utah.gov/COMPLEX/

CADD_Support/Digital_Signatures/