1. give a description of QR Code before 2013/1/1
I get a description doc in details from baidu doc: http://wenku.baidu.com/view/5c4c28e9856a561252d36f6e.html
Besides, I store a copy in baiduYun: http://pan.baidu.com/s/1d6BUp Done!
2. recommend a good article of garbage collector.
http://journal.stuffwithstuff.com/2013/12/08/babys-first-garbage-collector/ Done!
3. learn some knowlege of cipher:
1) article one: Digit signature: http://www.youdzone.com/signature.html unDone
2) article two: theory of RSA: http://www.cnblogs.com/vamei/p/3480994.html unDone
2. compare blue-teeth and Wifi technologe.
Is it doable to build a blue-teeth server on the local machine and a client app on the mobile?
2.give a example of cipher in login before 2013/2/1.
3.give a example of encrypt of public key and private key before 2013/1/20.
