one-way function การใช้

• Hashing algorithms are one - way functions
• As it turns out , true one - way functions are useful , too
• One - way functions may not sound immediately useful because you can t get the plaintext back out of a one - way computed ciphertext
• According to the described quantum one - way function , a quantum digital signature scheme whose security is based on fundamental principles of quantum physics is given and that the signature scheme is absolutely secure using one method of key distribution is shown
• Following are the main results of this thesis : 1 detailedly analyze some related schemes concerning group key management and authentication , especially logical key hierarchy ( lkh ) and one - way function tree ( oft ) . we point out the reasons that oft fails to provide forward and backward security
• Of course , functions that are almost one - way are pretty useful , as all public key functions are , at their essence , one - way functions with " trap doors . " functions that are good candidates for public key cryptography are those that are easy to compute in one direction , but very difficult to compute in the other direction unless you know some secret
• Then we brought out algorithm to construct ergodic matrix according to the recursion formula ( i ) and expatiate characteristic theorems about “ ergodic matrix ” by the numbers , the difficult problem and one - way ( trapdoor ) function based on the ergodic matrix over finite field . then we put forward the concept of strong matrix based on ergodic matrix according to a problem and the algorithm of finding and constructing the strong matrix of ergodic matrix . as one - way function played an important role in cryptography , we gave a new plan to realize application pattern in cryptology