IOS系统“语音备忘录”音频文件生成方式检验要点探讨  

Exploration into Essentials about Checking Procreation Ways of Audio Files Saved with“Voice Memo”APP under IOS

作　　者：周娟[1] 易爽 ZHOU Juan;YI Shuang(School of Criminal Investigation&Forensic Identifi cation Center,Southwest University of Political Science and Law&Chongqing Higher Educational Engineering Research Center of Forensic Science,Chongqing,400120,China)

机构地区：[1]西南政法大学刑事侦查学院,西南政法大学司法鉴定中心,物证技术重庆市高校研究中心,重庆400120

出　　处：《刑事技术》2021年第6期642-646,共5页Forensic Science and Technology

基　　金：国家自然科学基金青年项目(62002301);重庆市科委科技计划项目(cstc2018jscx-msyb X0115、cstc2019jcyj-msxm X0393);重庆市教委科技项目(KJQN201900307、KJQN201900305)。

摘　　要：目的探究iPhone或iPad的“语音备忘录”内保存的音频文件的生成方式。方法对多款型iPhone或iPad设备的“语音备忘录”功能进行实验,通过对“语音备忘录”的录制、裁剪、分享、保存、替换、修改文件名等功能生成的音频文件的元数据信息和文件尾部信息进行对比检验,对其生成方式进行探究。通过对“语音备忘录”与“微信”APP及“文件”APP之间相互转发及转储后的音频文件的元数据信息和文件尾部信息进行对比检验,对其流转规律进行探究。结果“语音备忘录”中不同功能生成的音频文件的元数据信息和文件尾部信息有规律性差异;经过“语音备忘录”与“微信”APP及“文件”APP之间相互转发及转储的音频文件的元数据信息和文件尾部信息也会发生规律性改变。结论通过检验“语音备忘录”中的音频文件的元数据信息和文件尾部信息可以判断其生成方式。Objective To explore the procreation ways of audio files stored with“voice memo”APP under IOS of iPhone or iPad.Methods Experiments were tried on the“voice memo”functions from model-various iPhone or iPad devices,having been undertaken of such functional operations as recording,clipping,sharing,saving,replacing and modifying file names so that the relevant metadata and tail information were generated into the resultant audio files.Comparisons were carried out among the resulted information so as to seek their procreation ways.Through contrasting both the metadata and tail information from the audio files that were transferred and dumped between the apps of“voice memo”and“wechat”and“file”,how these information contents were conveyed and delivered was explored.Results Both the metadata and tail information showed regular discrepancy among the resultant audio files if different functional operations of“voice memo”were adopted into an audio file.Similar regularity of alteration was also found when audio files were transferred and dumped between the apps of“voice memo”and“wechat”and“file”.Conclusion An audio file can be judged of its procreation way with examination into its metadata and tail information from the“voice memo”.

关 键 词：语音备忘录 音频文件 生成方式 

分 类 号：D793.2[政治法律—政治学]