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1 9 F ebru a ry 2 0 0 4
The Signals and Physical Sciences Security Center of the Information Assurance
Directorate has tested the film sample provided by Martin Padilla and labeled as
“C I FA – Film Sample s 3M Corp .”
The results are attached.
The Radio Frequenc y (R F ) attenuation o f 3 5 dB from 30 M Hz to 1.5 GH z
exceeds the specification of 3 0 dB .
The Infra red ( IR ) attenuation was measured to be :
83 % at 800nm
94.6% at 900nm
97.3% at 1000nm
98.85%at 1300nm
99.26%at 1550nm .
This exceeds the specification of
80%at 800nm
90%at 900nm
94 %at 1000nm
97%at 1300nm
98% at 1550nm to 2300nm .
The Ultraviole t (U V ) attenuation was measured to be
68% at 400nm
93% at 375nm
This is acceptably close to the specification of
70% at wave lengths less than 400nm
90% at 375nm.
Note that UV performance in the field will be improved by the use of UV -absorbing
adhesives.
This film does meet the minimum security standard NSA has used for window
film protection . This standard is only a guideline used to assist Certified TEMPEST Test
Authoritie s (CTTA ) and other cognizant authorities in providing supplemental IR and RF
shielding . The use of films or glazings meeting this requirement is at the discretion of the
cognizant security authority who should take all relevant security factors into account.
NSA has no information on the anti- fragmentation properties of this film, which
should be provided by the manufacturer.