counter part
5.We must concentrate superior forces and fight exterior-line operations in every campaign or battle, whether in the stage of strategic defensive or in that of strategic counter-offensive, in order to encircle and destroy the enemy forces, encircling part if not all of them, destroying part if not all of the forces we have encircled, and inflicting heavy casualties on the encircled forces if we cannot capture them in large numbers. 
7.In addition to his meeting with the Colombian leader, President Bush will take part in events designed to show the US commitment goes beyond counter-narcotics.
9.Certain kind of attacks on some block ciphers may be efficiently resisted by mixing the round keys with a group of frequently changed numbers computed from system time and the counter of data blocks.The general form of such practical schemes has been discussed.Because the changing of certain part of round keys is often much faster than the operations of certain rounds of encryption (or decryption),the efficiencies of this kind of block cipher schemes are quite obvious.In security,as nearly every plaintext data block is encrypted with different keys,and as most attacking techniques have high demands of plaintext/ciphertext pairs,it is difficult for them to work in such a cipher scheme.This may result that a block cipher with time and counter parameters is secure even with cases that the number of round is largely reduced.As an important example of the entire solution,we introduce a cipher scheme TCR6 which has some satisfactory features in both security and efficiency.
