Hello! I read about overlooking of monitor radiation. Introder can scan the electron-beam radiation from electron-gun. He simple transmit this radiation to self electron-gun and sinchronize frequance. This method work with b/w monitor. The overlooking of color-monitor more dificult - introder will see 4 gradation of gray (all guns off, work one, two, three guns). But we can select spesial colors (red-blue or blue-green) and allways will work only one (or two) guns. In this way introder will see dark (or light) gray screen without any information!!! Is it corect? Do now present more improve overlooking system? Some words about DES - I spoke with one cryptoanalisyst from KGB and he sow, that for number crypto algotitm c(key, text) (key is keyLength tall) present f(key, text), that for all key1 and key2 present key with length keyLength, that c(key2, c(key1, text))==f(key, text). He also say, that now present f() for c()=des(), more f() wery like des(). That`s why for decrypting of des(k1, des(k2, ... des(kN, text) ... )) we must try 2^56 keys with spetial function. --- Victor A. Borisov aka blaster; Relcom R&D; Email: blaster@rd.relcom.msk.su; Phone: +7(095)-943-4735; +7(095)-198-9510; === Don`t panic! ===