| 摘要 | 第1-5页 |
| Abstract | 第5-9页 |
| 1 Introduction | 第9-13页 |
| ·Backgrounds of the Edon80 | 第9-12页 |
| ·Defects of the Edon80 | 第12-13页 |
| 2 Algorithmic description | 第13-18页 |
| ·The generation of the keystream | 第13-15页 |
| ·Encrypt and Decrypt process | 第15页 |
| ·The corresponding improvement | 第15-18页 |
| ·The improve of αi | 第15-17页 |
| ·The improve of initial sequence | 第17-18页 |
| 3 Period growth of quasigroups | 第18-28页 |
| ·Analyzing the efects towards the period growth of quasigroup | 第18-20页 |
| ·Construction of the quasigroups with large period growth | 第20-28页 |
| ·Order with prime number | 第20-25页 |
| ·Order with the power of two | 第25-28页 |
| 4 The relevant proof | 第28-30页 |
| ·The quasigroup and its conjugates | 第28-30页 |
| 5 Security of the stream cipher | 第30-35页 |
| ·Chosen-plaintext attack or Chose-ciphertext attack | 第30-31页 |
| ·The exhaustive attack | 第31-32页 |
| ·The exhaustive attack of the stream cipher | 第31-32页 |
| ·The exhaustive attack of the improved stream cipher | 第32页 |
| ·Statistical attack | 第32-33页 |
| ·Guess-and-Verify Attack | 第33-35页 |
| ·The Guess-and-Verify attack of the stream cipher | 第33页 |
| ·The Guess-and-Verify attack of the improved stream cipher | 第33-35页 |
| 6 Summaries | 第35-37页 |
| Bibliography | 第37-39页 |
| Academic Achievements and Awards | 第39-40页 |
| Acknowledgements | 第40页 |
