近年来,许多手机用户都有一个感觉——垃圾短信少多了,以往每天都能收到几条甚至十几条垃圾短信,现在几天也收不到一条。垃圾短信这个多年未能治愈的社会顽疴,好像在短时间内忽然有了极大的改善。这一“奇效”如何取得,能不能保持下去?垃圾短信攻防战的成败关键在哪里? In recent years, many mobile phone users have a feeling - much less spam messages, in the past every day to receive a few or even a dozen spam messages, and now received a few days. Spam, the social stubbornness that has not been able to be cured for many years, seems to have suddenly improved dramatically in a short period of time. This “wonders ” how to obtain, can not keep going? The key to the success or failure of the spam attack and defense battle where?