We present a concrete situation where there is a difference between the theoretical security of a cipher and its limitations when implemented in practice. Specifically, when entering a PIN, smudges on the keypad substantially reduce its security. We show how the number of possible keys in the presence of the "smudge attack" can be…

This study aimed to describe the writing activities that test takers engage in when responding to the writing tasks in the "TOEFL iBT"[superscript R] test and to examine the effects of task type and test-taker English language proficiency (ELP) and keyboarding skills on the frequency and distribution of these activities. Each of 22 test…

Describes the experience of a bilingual kindergarten teacher who, in an effort to improve students' writing, used color-coded symbols familiar to students on specific key functions of the computer keyboard. Familiarity with the keyboard functions facilitated the children's understanding and consequent use of software, and allowed the children to…