  Computer fonts can be one of solutions supporting a protection of information
against electromagnetic penetration. This solution is called -Soft TEMPEST-.
However, not every font has features which counteract the process of
electromagnetic infiltration. The distinctive features of characters of font
determine it. This article presents two sets of new computer fonts. These fonts
are fully usable in everyday work. Simultaneously they make it impossible to
obtain information using the non-invasive method. Names of these fonts are
directly related to the shapes of the characters. Each character of these fonts
is built only with vertical and horizontal lines. The differences between them
consist in the different widths of the vertical lines. The Symmetrical Safe
font is built from vertical lines with the same widths. The Asymmetrical Safe
font is built from vertical lines with two different widths of lines. However,
the appropriate proportions of the widths of the lines and clearances of each
character of the safe font have to be met.
