MarijeNFI wrote:
Having a battery pack would definitely fix requirement two, though temperatures in the tin box might become too high for the mobile phone(s) since there is no ventilation.
Hmmm, I doubt it.
I mean, maybe depending on the (optional/yet to be recognised as a good idea) foam inside it, otherwise metal tin boxes tend to have an excellent heat transmission, of course experiments should be made, but basically a handy can be (while being operated, i.e. in "full power mode") held in your hand for minutes/hours (with - say - 2/4 of the phone surface wrapped in your hand and 1/4 pressed against your ear) and I am failing to see evidence of people accessing emergency rooms with scolded ears.... <img src="images/smiles/icon_rolleyes.gif" alt="Rolling Eyes" title="Rolling Eyes" />
BTW, and OT, there are exceptions, as always <img src="images/smiles/icon_wink.gif" alt="Wink" title="Wink" /> :
http://www.ebaumsworld.com/jokes/read/764484/
Back to topic, it seems like RFI shielding glass is anyway above the 30 db attenuation, actually above 40 db for the frequencies we are mainly interested in:
http://www.tempestusa.com/emitech.html
http://www.ramayes.com/RF_Shielded_Glass.htm
http://www.ramayes.com/Data%20Files/Tempest%20Security/New_DataStop_Brochure.pdf
These guys also have "forensic pouches":
http://www.ramayes.com/RF_Shielded_Forensic_Pouch.htm
http://www.ramayes.com/Data%20Files/Select%20Fabricators/SFP%20Security%20Pouch%20Sell%20Sheet%2005072012.pdf
promising more than 75 db attenuation <img src="images/smiles/icon_eek.gif" alt="Shocked" title="Shocked" />
As well, here is another source (still 75 db attenuation):
http://www.select-fabricators.com/products/forensics/usb-forensic-pouch/
Here is the test report:
https://www.justnet.org/pdf/SFP1215W-Forensic-Pouch.pdf
though, with all due respect to the good guys at the "NIJ Electronic Crime Technology Center of Excellence", it seems to me more like a joke than anything else. <img src="images/smiles/icon_question.gif" alt="Question" title="Question" />
It seems like there is a US Military "standard" on shielding, MIL-STD-285 (from 1956) which has been replaced in 1997 by IEEE-STD-299 and in 2006 by 299-2006 and that it is "in the works" yet a new one titled "P299.1 IEEE Draft Standard Method for Measuring the Shielding Effectiveness of Enclosures and Boxes Having All Dimensions between 0.1 m and 2 m (P)".
I find surprising that the current standard IEEE-299-2006 is not referenced more widely, though, admittedly, the standard is about/limited to "enclosures having all dimension greater than or equal to 2.0 m", as an example, the standard is used anyway by Chomerics:
http://www.chomerics.com/products/thermoplastics/index.html
even for smaller enclosures, see:
http://vendor.parker.com/Groups/Seal/Divisions/Chomerics/Chomerics%20Product%20Library.nsf/24eb4985905ece34852569580074557a/fbadc5684e28bf8a85257355004eb669/$FILE/PREMIER-%20PEI-140-TB--EN-1026.pdf
jaclaz
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