We in the West have been duped by the marketing driven consumption society into thinking that any technology more than 3 weeks old is obsolete and useless. Shortwave technology works fine, in fact it has benefited from recent improvements in electronics to be more reliable and user-friendly than ever - it used to be hard to read your generic Bactrim exact frequency off an analogue dial - not anymore with digital tuning on shortwave receivers (there are many other improvements - too many for a short post).The Russians are adept at using tried and true technology to defeat us very effectively at low cost - other examples - years ago a captured Russian (Soviet) fighter jet was found to have VACUUM TUBES in the communications equipment - the first reaction of the western experts was "how primative" but then they realized that vacuum tubes have a serious advantage - they are buy Bactrim not destroyed by the electromagnetic pulse from a nuclear detonation while a solid-state microchip radio would be totally fried and rendered useless. Another example, while NASA spent millions developing a pen that would work in zero-G of space the Russians simply used pencils (which work fine).Somehow I think that we have been so brainwashed by advertising into wanting the latest technology that we have forgotten the value of some of the legacy technologies which often turn out to be superior Bactrim 400mg (not to mention much cheaper).The real surprise in this article is that the author would be shocked that technologies such as shortwave radio actually work, which shows just how effectively we have been brainwashed into thinking that only the very newest gadgets have any value. (Good job Madison Avenue!)WHZ @ Lance - "What is not explained is buy Bactrim why merely one repetition (re-use) of a code is sufficient to crack the code."One use may not be enough, but if you have a belief that you have cracked a code, a second use of the cracked cipher will confirm that you correctly decoded an earlier document, and validate both communications.In the English language certain letters occur more frequently than others Bactrim 800mg. The longer the transmission, and especially if a code were reused several times - can give more clues to what the encrypted letters mean.For simple substitution ciphers - Spaces between the words can indicate certain common phrases, which further gives you tips to translating the encryption. Some letters (R S T L N E) buy generic Bactrim tend to occur more often, so counting letter occurrences in the encrypted document can give you a hint that a common letter is likely a R S T L N or E, etc.. A word offset by spaces on either side is likely an I or A.. etc.. Run on a computer, this doesn't take too Bactrim 400mg long for a simple substitution cipher to be broken. If the cipher is frequently changed and the codes kept short - the message becomes harder to break and the next message remains secure even if the first message is decoded. Reuse of a broken cipher yields rapid decoding and solid intel that can be acted upon. Read up on the WWII Enigma machine, especially to the parts of how the information was used once the code was broken.@ Absent - 73's from AB8XS Bactrim 800mg :P I'm a amatuer radio (ham) operator and we use frequencies from microwave to below a.m. broadcast. Many global conversations take place every day on our bands. We still use morse code ( it uses a lot less power to communicate than voice), voice, keyboard to keyboard and a lot of other modes. We can build stations that will transmit a signal world wide from junk radio parts and a penlite battery. We have many trained and organized volunteer operators world wide who are ready to step in when needed. Use of the "shortwave" bands are far from a thing of the past, lest you conclude that fact from this buy Bactrim article.