hi,Alyai van khoe chu?Hum ni minh thi, Alyai thi xong chua?

In cryptography, rekeying refers to the process of changing the encryption key of an ongoing communication in order to limit the amount of data encrypted with the same key.

encryption is the process of transforming information (referred to as plaintext) using an algorithm (called cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key.

uhm,pipi Aly. G9 nha

Aly ?ang h?c l?p m?y?

In practice, we will need to guarantee not only that a packet is dead, but also that all acknowledgements to it are also dead, so we will now introduce T, which is some small multiple of the true maximum packet lifetime. The multiple is protocol dependent and simply has the effect of making T longer. If we wait a time T after a packet has been sent, we can be sure that all traces of it are now gone and that neither it nor its acknowledgements will suddenly appear out of the blue to complicate matters.

In computing, Internet socket or network socket or socket is an end-point in the IP networking protocol