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The Utah Digital Signature Act


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Why signatures?

Authenticates who created a document
Adds formality and finality
In many cases, required by law or rule
– Deeds and wills
– Contracts over $500 or for more than a
year (Statute of Frauds)
– Timesheets and reports
– Homework


Digital signatures

Not simply a typed name or image of a
handwritten signature
Based on public-key encryption
Associated with a digital document


Public-key encryption

Based on use of a related pair of keys
– Unable to determine one key from the
other
– Either key can decrypt material encrypted
with the other key
– One is made public, the other kept private
How to obtain public keys
Issue of key escrow


Trusted public keys

Public key given on a certificate, issued
by licensed certification authority
Able to trace pedigree of certificate to
government regulator
– Utah Department of Commerce
Certificate has not been revoked
– Revocations listed in a repository


Future developments

State actions
– Smart cards
– Electronic notary seals
– “Signature surrogates”
Private sector actions
– Cybernotaries
– Electronic checks
– Anonymous, verified transactions