 xref alt secur 10180 sci crypt 16135 newsgroup alt secur sci crypt from oml eloka demon uk owen lewi path edu!da-new harvard edu!noc net!howland reston an net!usc!cs utexa edu!uunet!mcsun!uknet!bnr uk!demon!eloka demon uk!oml subject re tempest distribut refer 1993apr26 193801 12416 lynx dac northeastern organ eloka consult project manag repli-to oml eloka demon uk x-newsread simpl new 1 90 ka9q di 1 21 line 44 date mon 26 apr 1993 08 38 59 +0000 messag-id 735813539snz eloka demon uk sender usenet demon uk in articl 1993apr26 193801 12416 lynx dac northeastern angel foghorn leghorn coe northeastern write heard sourc tempest pick-up crt pick emiss chip if true kind monitor differ becuas screen pick-up video control can verifi refut thi? you correct time tempest codeword standard share nato govern limit inadvert emiss electromagnet radiat conduct the limit set standard classifi open sourc electr magnet compon electromagnet exploit it basic rule physic electromagnet field associ path conduct flow electron among thing drive 1987 korean built at clone associ 24 pin dotmatrix printer the major sourc unintent emiss crt to video driver card rs232 parallel cabl printer head the emiss gross detect crudest equip were appli good test equip intellig measur emiss level find potenti sourc leak where cryptographi seriou purpos poor tempest protect secur hazard in earli eighti allow commerci concern financi institut level protect tempest threat led seri brief invit corpor 'releas' cut-down tempest stansard commerci 'releas' equip meet standard price approv custom afaik commerci standard remain classifi if it? -- - owen lewi - tele fax +44- 0 794-301731 eloka consult project manag oml eloka demon uk pgp 2 public kei request 