## Authentication by keystroke timing: some preliminary results |

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87 digraphs analysis approximately assumed August and December August test authentication procedure authentication system authentication tests beta function claimant and originator December test denotes developed diagonal digraph times exceeding docent duffle eggnog exceeding 500 milliseconds experiment finger foxy given digraph gnome H versus histogram hubby impostor independent beta variates keystroke keystroke-timing kurtosis large numbers logged lyse M M M M M M mean digraph model for authentication monotone function normally distributed NORMAN SHAPIRO number of digraphs number of replications originator and claimant originator's p-value pablum particular digraph plots primary error product of independent R-R digraphs Rand razz reject H sample secondary error skewness smirk smuggler statistical inferences statistical model subjects sufficient statistics swat sweaty t-statistic t-tests tetragraphs Text 1 Text texts were pooled three texts touch typists transformed data transformed digraph trigraphs type Text typing patterns typing signature variances vector vivisect wheeze WILLIAM LISOWSKI