The Key Technology Reserach On Android Forensics

Smartphones are widely used owing to the features: easy to carry, easy to operate and fully functional. Because they are elusive and easy to carry, more and more criminals began to use smartphones to engage in criminal activities. Therefore, how to quickly take a comprehensive and assertive evidence from the smart equipment, has become a crucial importance in the detection of cases. Criminals often use some synonyms instead of relevant sensitive words to make it difficult to get the keyword match in the process of evidence analysis to cover the crime. In consequence, to analyse and resolve this problem, the main works in the paper are:Analyzing android storage structure especially android storage structure especially the structure of the cache to make the taking of the evidence more complete; aiming at the shortcomings of the existing evidence analysis and the scattering of the key words in the process of text classification, we put forward an improved algorithm of the text classification based on synonyms expansion. The experimental results show that the improved algorithm can greatly improve the recall, so that a more comprehensive search keywords.We propose a semantic similarity computation based on the search engine to improve the Web Dice by denoising and elimination of redundancy. The experimental results show that the improved algorithm has a higher correlation. Due to the increasing of the synonym expansion, in the end of the paper, we modify the key weighting, have increased the corresponding weighting of the synonyms and have presented the overall process of improved algorithm.Evidence analysis is a key link in the intelligent terminal forensics process, thus put forward and improve the method of analysis to obtain the comprehensive criminal evidence are of great importance and to take the evidence and to crack down on the crime.