Words to Describe signatures

How signatures often is described ("________ signatures")

• spatial
• blind
• distinct
• molecular
• secure
• electronic
• original
• joint
• partial
• necessary
• spectral
• official
• clear
• archaeological
• experimental
• undeniable
• characteristic
• valid
• more
• folded
• seismic
• illegible
• authentic
• additional
• digital
• time
• genuine
• approval
• identical
• appropriate
• enough
• sufficient
• acoustic
• geochemical
• genetic
• corresponding
• based
• above
• stable
• facsimile
• infrared
• one
• optical
• respective
• key
• isotopic
• handwritten
• requisite
• distinctive
• unauthorized
• printed
• page
• forged
• counter
• correct
• required
• typical
• numerous
• proper
• different
• unique
• sexual
• fictitious
• thermal
• individual
• false
• multiple
• magnetic