CN102143176B - Remote evidence obtaining system during trail in court - Google Patents

Remote evidence obtaining system during trail in court Download PDF

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CN102143176B
CN102143176B CN 201110075452 CN201110075452A CN102143176B CN 102143176 B CN102143176 B CN 102143176B CN 201110075452 CN201110075452 CN 201110075452 CN 201110075452 A CN201110075452 A CN 201110075452A CN 102143176 B CN102143176 B CN 102143176B
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signature
document
fingerprint
string
testimony
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CN102143176A (en
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马永祥
马鸣宇
王鹏
杨毅
陈志宾
曹金岗
刘勇
邵云霞
王云丽
高栋才
李洁
李世武
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河北华烨冀科信息技术有限责任公司
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Abstract

一种法院审理过程中的远程取证系统,所述系统硬件由便携式远程多媒体取证终端和设置在法庭内的多媒体主机组成,二者之间通过计算机网络连接,庭审法官通过计算机网络与远程证人进行法庭调查或质证,获取证言并将证言笔录传送到取证终端,证人对证言笔录进行核实后输入手写签名,系统将证人签名数据嵌入到证言笔录文档中并提取文档摘要,然后证人输入指纹,系统对文档摘要、证人指纹特征码、签字时间进行合并变换,最后利用数字证书加密签名后打包归档,取证过程即结束。 A process of trial court evidence remote, the system hardware by a portable remote terminal and the Multimedia provided evidence in court the media hosts which are connected via a computer network between them, the trial court judges through a computer network and remote witness investigation or cross-examination, after obtaining testimony and transcripts of testimony delivered to the terminal evidence, witness testimony transcripts input handwritten signature verification, embedded system will record the testimony of witnesses to the signature data extraction and document summary document, and then enter the witness fingerprint system documentation Abstract, witnesses fingerprint signature, time signature merge transformation, after the last use of digital signature certificate encryption package archiving, forensics process ends. 本发明实现了远程取证而且能保证信息安全、有效,同时也给当事人对证人证言进行质证创造了条件,使司法结果更加公正、公平。 The present invention enables remote evidence and information to ensure safe and effective, but also to the parties to cross-examine the witness testimony create the conditions so that justice results more just and fair.

Description

一种法院审理过程中的远程取证系统 A process of trial court in the remote forensic system

技术领域 FIELD

[0001] 本发明涉及一种在法院审理案件中用于远程获取证人证言的专用视讯系统,属通信技术领域。 [0001] The present invention relates to a method for remote access of dedicated video testimony in court cases in the system belongs to the communication technical field.

背景技术 Background technique

[0002] 强化庭审功能是目前审判方式改革的一项重要内容,而强化庭审功能的一个重要方面是严格质证程序,这就要求所有的证据材料包括证人证言都应当在开庭时出示并经双方当事人质证、辩论。 [0002] strengthen the function trial is a way to reform an important part of the trial, and to strengthen an important aspect of the trial function is strictly cross-examination program, which requires all of the evidence, including the testimony of witnesses and shall be presented by the parties at the hearing cross-examination, debate. 但在某些情况下证人往往不愿出庭或无法出庭作证,导致诉讼当事人无法对证人证言进行质证,法官也不能在庭上对证人证言进行调查,从而使当事人的证言无法采信,有可能因此而影响司法结果的公正和公平。 However, in some cases, witnesses are often reluctant or unable to testify in court, litigants can not lead to cross-examination of the witness testimony, the judge can not investigate witness testimony in court, so that the testimony of the parties could not admissible, there may therefore affect the fair and equitable judicial outcomes. 因此,司法审理迫切需要一种解决以上问题的远程取证技术。 Therefore, the urgent need for a judicial review to solve the above problem remote forensics.

[0003] 为了防止证人事后反悔或证言被非法篡改,证人对其证言进行核对后还应签名或者盖章。 [0003] In order to prevent the witness testimony afterwards go back or have been illegally tampered with witnesses should be signed or sealed after checking their testimony. 但是,传统的证言记录纸质化不能与远程审理很好匹配,导致文件数据的可靠性较差,必须设法排除各种可能干扰、解决证据材料的有效性问题。 However, the testimony of the traditional paper-based records can not hear well matched with the remote, resulting in poor reliability of the data file, it must try to remove all possible interference, to solve the problem of the validity of the evidence.

发明内容 SUMMARY

[0004] 本发明的目的在于克服现有技术的不足、提供一种法院审理过程中的远程取证系统,以打破时间和空间因素对庭审活动的限制,保证庭审过程公正、高效。 [0004] The present invention is to overcome the disadvantages of the prior art by providing a system for remote forensics court proceedings in order to break the constraints of time and space factors on the activities of the trial, during the trial to ensure the fair and efficient.

[0005] 本发明所称问题是以下述技术方案实现的: [0005] The present invention is based on the problem referred to in the following technical solution:

[0006] 一种法院审理过程中的远程取证系统,所述系统硬件由便携式远程多媒体取证终端和设置在法庭内的多媒体主机组成,二者之间通过计算机网络连接,所述便携式远程多媒体取证终端包括: [0006] A remote procedure court evidence, the system hardware by a portable remote terminal and the Multimedia provided evidence in court the media hosts which are connected via a computer network therebetween, said portable remote terminal multimedia forensics include:

[0007] CPU,用于交换、控制、处理系统数据; [0007] CPU, for switching, control and data processing system;

[0008] 触摸屏,用于显示视频和文档、接受手写签名输入; [0008] Touch screen for displaying video and documents, accept a handwritten signature input;

[0009] 指纹采集器,用于录入证人指纹,并将指纹特征编码输入至指纹鉴别单元; [0009] The fingerprint reader for fingerprint input witnesses, and inputs to the minutiae fingerprint identification encoding means;

[0010] 指纹存储器,用于存储指纹特征编码; [0010] fingerprint memory for storing fingerprint feature coding;

[0011] 数字证书存储器,用于存储便携式远程多媒体取证终端的数字证书,数字证书用于对文档签名信息串进行签名,以形成证人证言最终数字文档; [0011] The digital certificate memory for storing the digital certificate of the portable terminal remote multimedia forensics, the digital certificate signature information for the document signature string, testimony to form a final digital document;

[0012] 文档操作单元,用于显示文档内容、提取文档摘要、将签字手写笔迹图片与文档合并、文档签名信息串与文档打包处理; [0012] The document operation unit, for displaying the document content, the document summary to extract the signature handwriting image merged with the document, the document with the document signature information string packing process;

[0013] 指纹鉴别单元,用于将指纹数据与存储的证人指纹数据进行对比,判断其是否匹配; [0013] The fingerprint identification unit, the witness fingerprint data with fingerprint data will be stored for comparison, determine whether it matches;

[0014] 加密、解密单元,用于数据加、解密处理; [0014] encryption, decryption unit, a data encryption and decryption processing;

[0015] 文件收发通信单元,用于侦测文件的到来和发送文件准备好的消息操作; [0015] file transceiving communication unit, for detecting the arrival of the file and sending the prepared message file operation;

[0016] 所述便携式远程多媒体取证终端中设有取证文件存储器; [0016] The portable remote terminal is provided with forensic evidence multimedia file memory;

[0017] 取证按如下步骤进行:[0018] 庭审法官通过计算机网络与位于便携式远程多媒体取证终端前的远程证人进行法庭调查或质证,获取证言并将证言笔录传送到便携式远程多媒体取证终端,终端侦测到证言文档到来立即在屏幕上显示,证人对证言笔录进行核实,确认无误后通过触摸屏输入手写签名,加以确认,系统将证人签名数据嵌入到证言笔录文档中,形成签字后的文档并提取文档摘要,然后证人通过指纹采集器输入指纹,由系统提取其指纹特征码,系统对文档摘要、证人指纹特征码、签字时间进行合并变换形成文档签名字符串,最后利用数字证书将文档签名字符串加密签名后打包,形成证人证言最终数字文档,存入取证文件存储器中,并发送文档准备好的消息给法庭多媒体主机,由其下载后归档,取证过程即结束。 [0017] Evidence proceed as follows: [0018] The trial judge remotely via a computer network located in front of witnesses multimedia portable remote terminal forensic investigations or forensics cross-examination, and testimony Notes obtaining testimony to the portable multimedia forensics remote terminal, the terminal reconnaissance measured testimony documents come immediately displayed on the screen, the witness testimony transcripts verify, confirm correct input handwritten signature via the touch screen, to confirm, the system will be embedded witness signature data to testimony transcripts document, documented the signature and extract the document summary and witnesses fingerprint input through a fingerprint reader, a fingerprint pattern extracted by the system, the system for document summary, witnesses the signature fingerprint, signature transformation time merge document signature string formed. Finally, the digital certificate encrypted document signature string after the signature package, the final form of digital documents witness testimony, forensic document into memory and sends the message to the court document prepared multimedia host, after downloading its archive, evidence collection process ends.

[0019] 上述法院审理过程中的远程取证系统,系统在对文档摘要、证人指纹特征码、签字时间进行合并变换处理时,按如下算法进行: [0019] The courts hear and remote forensic system in the process, the system in the summary document, witnesses fingerprint signature, time signature merger conversion process, the following algorithm:

[0020] 用F表示证人的指纹特征码,固定长度620字节;W表示文档数字摘要串,固定长度40字节;T表示签字时间字符串,固定长度14字节,H表示变换后的文档签名字符串,长度674字节,从指纹特征码串F第二个字符开始,先将文档数字摘要串W每字符逐个插入指纹特征码串F的两相邻字符之间,形成第一中间字符串SI,SI= (F1W1F2W2F3W3…F619F620),其中Fi为指纹特征码串F的第i个字符,Wj为文档数字摘要串W的第j个字符;然后将签字时间字符串T每字符逐个插入第一中间字符串SI中,得到第二中间字符串S2 ;将第二中间字符串S2的每个字符S2k (S2的第k个字符)取ASCII码ak,ak异或53得到bk,再将bk转换成字符Hk,形成文档签名字符串H,即H= (H1H2…H674)。 [0020] represented by the signature fingerprint witness F., The fixed length of 620 bytes; W is digital abstract string representing the document, a fixed length of 40 bytes; T represents a time signature strings, 14-byte fixed-length, H represents the transformed document signature string of 674 bytes, the signature fingerprint from the second character string F starts, first digital document summary character string W individually inserted between each two adjacent characters of the fingerprint pattern string F, forming a first intermediate character string SI, SI = (F1W1F2W2F3W3 ... F619F620), where Fi is the i-th character string signature fingerprint of F, Wj is the j-th character string W, digital abstract document; then signed by one character each time a string T insert SI in a middle of the string, to give the second intermediate string S2; S2 of the second intermediate each character string S2k (S2 k-th character) takes the ASCII code ak, ak bk obtained isobutyl or 53, then bk converted into characters Hk, form document signature string H, i.e., H = (H1H2 ... H674).

[0021] 本发明利用多媒体视频装置通过计算机网络获取证人证言,实现了远程取证并给当事人对证人证言进行质证以及法官在法庭上对证人证言进行调查创造了条件,使司法结果更加公正、公平。 [0021] The present invention utilizes multimedia video device to obtain witness testimony through a computer network, remote forensics and to the parties to the testimony of witnesses cross-examination, and investigating magistrates to witness testimony in court to create the conditions so that justice results more just and fair. 同时,本发明利用指纹识别技术和PKI密码技术对证人证言笔录进行保护,在证人无数字证书的情况下保证了证据材料数据的完整性、有效性,不仅有效防止了证人事后反悔,而且还彻底消除了证人证言被非法篡改的可能性,很好地解决了审判证据电子化与信息安全之间的矛盾,为提高法院审判流程的数字化程度提供了强大的技术支持。 Meanwhile, the present invention is the use of fingerprint recognition technology and PKI encryption technology to protect the transcripts of the testimony of witnesses, to ensure that the evidence of data integrity, validity of digital certificates in the absence of the witness's case, not only effectively prevent the witness afterwards go back, but also thorough eliminating the possibility of the testimony of witnesses have been illegally tampered with, a good solution to the conflict between the evidence of the trial electronic and information security, it provides a powerful technical support for improving digital level courts process. 附图说明 BRIEF DESCRIPTION

[0022] 下面结合附图对本发明作进一步详述。 [0022] The following drawings in conjunction with the present invention will be further described in detail.

[0023] 图1是是本发明的结构框图; [0023] FIG. 1 is a is a block diagram of the present invention;

[0024] 图2是取证终端软件功能框图; [0024] FIG. 2 is a functional block diagram of a terminal software forensics;

[0025] 图3是文档加密流程框图; [0025] FIG. 3 is a block flow diagram of encrypting a document;

[0026] 图4是文档验证流程框图。 [0026] FIG. 4 is a block diagram of a document validation process.

[0027] 文中所用符号为:F、指纹特征码;W、文档数字摘要串;T、签字时间字符串;Η、变换后的文档签名字符串;S1、第一中间字符串;S2、第二中间字符串。 [0027] As used herein the symbols: F, signature fingerprint; W, digital document digest string; T, the time signature string; Η, document signing the converted character string; S1, a first intermediate string; S2, a second middle of the string.

具体实施方式 Detailed ways

[0028] 为了保证电子文件的安全,通常采用文档责任者的数字证书私钥进行签名,以实现电子文档的防篡改和抗抵赖。 [0028] In order to ensure the security of electronic documents, digital certificate private key is usually responsible for the document is signed, in order to achieve the tamper-proof and non-repudiation of electronic documents. 但本装置的使用者比较特殊,不可能给每个证人发放数字证书。 However, the user of the device are special, not possible to issue digital certificates to each witness. 本系统利用指纹特征码的排他性,不需要证人具有数字证书,同样确保了司法证据的安全性。 The system uses exclusive fingerprint signatures, no witnesses have a digital certificate, also ensures the security of justice evidence.

[0029]算法如下:H=U (F, ff, T) [0029] The algorithm is as follows: H = U (F, ff, T)

[0030] 其中F为采集的指纹特征码,固定长度620字节;W为文档数字摘要串,固定长度40字节;T为签字时间字符串,固定长度14字节,H为变换后的文档签名信息串,长度674字节。 [0030] where F is the acquired signature fingerprint, a fixed length of 620 bytes; W is a digital document digest string, a fixed length of 40 bytes; T is the time signature strings, 14-byte fixed-length, H is the transformed document signature information string, a length of 674 bytes.

[0031] 从指纹特征码串F第二个字符开始,先将文档数字摘要串W每字符逐个插入指纹特征码串,形成字符串SLSl= (F1W1F2W2F3W3…F619F620),Fi为F的第i个字符,Wj为W的第j个字符;同理,将签字时间字符串T逐个字符插入SI中,得到字符串S2 ;将S2的每个字符S2k (S2的第k个字符)取ASCII码ak,ak异或53得到bk,再将bk转换成字符Hk,等全部转换完形成字符串H,即文档签名信息串H= (H1H2…H674)。 [0031] F starts from a fingerprint signatures second character string, the first string of digital digest W documents one by one for each character string is inserted into the fingerprint pattern, the string is formed SLSl = (F1W1F2W2F3W3 ... F619F620), Fi is the i-th character F , of Wj is the j-th character W; Similarly, the signature time T by character strings SI inserted to obtain the string S2; S2 to each character S2k (S2 k-th character) takes the ASCII code AK, 53 to obtain the exclusive oR ak bk, bk and then converted into characters Hk, etc. End formed all converted string H, i.e., the document signature information string H = (H1H2 ... H674).

[0032] 通过终端内置数字证书对H进行签名,附加到文档中。 [0032] The built-in digital certificate signed by a terminal H, attached to the document.

[0033] 验证过程与此相反,解密签名得到H,通过U的逆变换得到F,W,T,新采集的指纹特征码与F比较,如通过验证则证明该文档是此人确认过的,提取文档摘要与W比较确定文档内容的完整性,时间T用来验证签名的真实性。 [0033] In contrast to this authentication procedure, the decrypted signature is H, obtained by the inverse transform F of U, W, T, the newly acquired fingerprint pattern is compared with F, such as by verifying the proof that the document is the person's confirmed, document summary extracted with W comparison to determine the integrity of the contents of the document, the time T used to verify the authenticity of the signature.

[0034] 以下结合附图对其原理进行详细描述。 [0034] The following detailed description thereof in conjunction with the principles of the accompanying drawings.

[0035] 图2中,在取证终端软件设计上,在硬件编解码的基础上采用事件驱动的多线程机制,同时设计了双缓冲区结构,即发送缓冲区和接收缓冲区,目的是为了使硬件编码的数据拷贝到发送缓冲区的过程与送接收缓冲区的编码流去解码的线程可以同时进行,减少时间开销。 In [0035] FIG. 2, in forensic terminal software design, multi-thread mechanism based on an event-driven hardware codec on, while the design of the double-buffer structure, i.e. transmit and receive buffers, designed to make hardware copies the encoded data to the transmit buffer during transmission of the encoded stream receiver buffer to decode thread may be performed simultaneously, reducing the time overhead.

[0036] 视频和音频格式为兼容其它视讯设备或软件,采用H.323协议集标准格式传送,H.245信令在两个终端间或一个终端和MCU (多点控制单元)间建立,并使用H.245标准的消息和规程。 [0036] Video and audio video format is compatible with other devices or software, using the standard H.323 protocol set transmission format, or between the H.245 signaling between a terminal and the MCU (Multipoint Control Unit) based on two terminals, and the use of H.245 standard of messages and procedures. 运用H.225.0呼叫控制信令来建立两个H.323终端间的连接,呼叫信令信道的开启先于H.245信道和其它任何逻辑信道的建立。 Using H.225.0 call control signaling to establish a connection between two H.323 terminal, a call signaling channel prior to the opening of the H.245 channel establishment and any other logical channels.

[0037] 图3描述了审讯电子文档加密的过程,目的是在责任当事人无数字证书情况下,保证电子证据数据的完整性和抗抵赖性。 [0037] Figure 3 depicts the trial of an electronic document encryption process aimed at under the responsibility of the parties without digital certificates, to ensure the integrity of electronic evidence data and non-repudiation.

[0038] 首先,证言笔录电子文档从取证文件存储器中载入,并在显示屏上显示,如果证人有异议或否定其内容,则流程结束。 [0038] First of all, the testimony transcripts electronic document into evidence documents from memory and displayed on the screen, if witnesses have objections or deny its contents, the process ends. 当证人确认无误后,在屏幕上手写签名,系统将签名笔迹图像嵌入到文档,并锁定文档使之只读,形成签字后文档。 When the witness confirmation, handwritten signature on a screen, the system signature handwriting image embedded in the document, and the document so that the read-only lock, after the signing of the document is formed. 从签字后文档提取文档摘要,同时当事人按捺指纹并采集指纹编码,将文档摘要、指纹编码与签字时间(或时间戳)进行编码变换,得到签名信息串,并使用装置的数字证书私钥进行加密,即数字签名。 Extracting the signature from the document summary of the document, while the parties inhibit fingerprint and fingerprint encoding, the document summary, fingerprinting and signature time (or time stamp) is encoded transform to obtain the signature information string, and using the device to encrypt the digital certificate private key that the digital signature. 将签名数据和签字后的文档进行打包处理,形成待传文件,放入取证文件存储器中,并向远程发送文档准备好的消息,等待远程提取,流程结束。 The signature data and documents after signing the packing process, the formation of file to be transferred, put in evidence file memory, ready to send documents remotely good news, waiting for the remote extraction, the process ends. 过程中加入当事人签字时间,目的是防止伪造数字签名。 Added during the time the parties signed in order to prevent forgery of digital signatures.

[0039] 图4是加密过程的逆过程,在证人否认证言的有效性时进行验证,主要验证证言笔录的内容是否被修改过并证明此文档是经过证人确认过的,证人不能否认。 [0039] FIG. 4 is the inverse of the encryption process, to verify when the witness denied the validity of testimony, the testimony transcripts verify whether the main content is modified and proved this document is the result of a confirmed witness, the witness can not be denied.

[0040] 验证过程是这样的:首先,将文件从多媒体主机案件卷宗归档库中提取出来进行解包处理,得到带有手写签名的文档和签名数据。 [0040] verification process is as follows: First, extract the files from a host of multimedia archive the case file out of the library to unpack, to give the document and signature data with the handwritten signature. 通过庭审当时装置的数字证书公钥解密签名数据,将编码变换的数据进行逆变换,得到签字时间、文档摘要和证人指纹特征码。 By the time the trial digital certificate signature device public key to decrypt the data, the data encoded transform inverse transform, time signature, document summary and witnesses fingerprint signatures. 对文档重新提取文档摘要,得到新的文档摘要。 The document re-extracted document summaries, get a new document summaries. 现场输入证人指纹采集新的指纹编码。 Witness the scene fingerprint input new fingerprinting. 从文档提取的签字时间得到新的签字时间(或从时间戳服务器取得时间戳)。 Get a new time signature from the document signed by the extraction of the time (or the time stamp from the time stamp server). 将新的文档摘要、签字时间、指纹编码和编码变换得到的文档摘要、签字时间、指纹编码分别进行比较。 The new document summary document summary, time signature, fingerprint encoding and transform, the time signature, fingerprint coding were compared. 如果签字时间相同则证明签名有效,否则签名是伪造的。 If the signature is the same time prove that the signature is valid, otherwise the signature was forged. 如果文档摘要相同,说明文档内容在签名后没有被修改过,否则已经被篡改。 If the same document summary, documentation content has not been modified since it was signed, or has been tampered with. 如果指纹编码匹配,则说明是当事人已经确认过的,证人不能否认。 If the fingerprinting match, the parties have confirmed that the witness can not be denied.

[0041] 本发明既满足了法院庭审全过程的数字化要求,又以指纹识别技术和PKI密码技术为基础,实现庭审记录等电子证据的防篡改、抗抵赖和签名防伪造。 [0041] The invention not only satisfies the court hearing the whole process of digitization requirements, again fingerprint recognition technology and PKI cryptographic technology, to achieve tamper-proof electronic evidence, court records, and non-repudiation signature anti-counterfeiting. 其主要工作步骤为: The main work steps:

[0042] 1.连接网络,开启装置载入硬件驱动,庭审法官通过计算机网络与远程证人进行法庭调查或质证; [0042] 1. Connection network loading opening device hardware driver, judges the trial cross-examination or forensic investigations relating to remote witness via a computer network;

[0043] 2.庭审结束,法庭书记员发送电子证言笔录,供证人确认; [0043] 2. The end of the trial, the court clerk to send electronic transcripts testimony, witnesses for confirmation;

[0044] 3.终端自动接收电子文档并显示在屏幕上; [0044] 3. The terminal automatically receives and displays the electronic document on a screen;

[0045] 4.证人浏览文档,核实后点击'确认'; [0045] 4. witnesses browse documents, after verification click 'OK';

[0046] 5.在屏幕上出现手写输入框,签字后,手指按住拖到文档合适位置,确定后锁定文档; [0046] The handwriting input box appears on the screen, the signature into a document hold down finger place, determining the locking document;

[0047] 6.当事人按捺指纹,系统提取特征码; [0047] 6. The parties restrain fingerprint, signature extraction system;

[0048] 7.对第5步得到的电子文档内容进行哈希运算(HASH),得到40字节长度的数字摘要; [0048] 7. The hashed (the HASH) the content of the electronic document obtained in Step 5, to obtain digital digest 40 bytes in length;

[0049] 8.从第5步得到的电子文档提取签字时间(如有条件也可从时间戳服务器取得时间戳); [0049] 8. obtained from step 5 of the electronic document signature extraction time (if the conditions can also be the time stamp from the time stamp server);

[0050] 9.将指纹特征码、文档数字摘要和签字时间进行合并变换,得到签名字符串; [0050] 9. The fingerprint signatures, time signatures and digital digest document merging transform, a signature string;

[0051] I 0.然后使用终端内置数字证书的私钥,对签名字符串进行加密,得到数字签名数据; [0051] I 0. then use the private key of the terminal built-in digital certificate, the signature string of encrypted data to obtain the digital signature;

[0052] I 1.将签名数据与第5步得到的电子文档打包处理,形成待传文档存入取证文件存储器,并发送文档准备好的消息给法庭多媒体主机; [0052] I 1. The signature data obtained in step 5 of packing process an electronic document, the document to be transmitted is formed into evidence file memory, and sends the document to the ready message court multimedia host;

[0053] I 2.法庭多媒体主机下载后归档,取证结束。 [0053] I 2. After downloading the host of multimedia court filing, the end of the evidence.

[0054] 本发明所称的计算机网络可以是互联网、局域网、广域网,也可以是某些专用网络,如政法专网,等等。 [0054] The present invention is referred to a computer network may be the Internet, LAN, WAN, or may be some private network, such as the POLITICAL private network, and the like.

Claims (1)

1.一种法院审理过程中的远程取证系统,其特征在于,所述系统硬件由便携式远程多媒体取证终端和设置在法庭内的多媒体主机组成,二者之间通过计算机网络连接,所述便携式远程多媒体取证终端包括: a.CPU,用于交换、控制、处理系统数据; b.触摸屏,用于显示视频和文档、接受手写签名输入; c.指纹采集器,用于录入证人指纹,并将指纹特征编码输入至指纹鉴别单元; d.指纹存储器,用于存储指纹特征编码; e.数字证书存储器,用于存储便携式远程多媒体取证终端的数字证书,数字证书用于对文档签名信息串进行签名,以形成证人证言最终数字文档; f.文档操作单元,用于显示文档内容、提取文档摘要、将签字手写笔迹图片与文档合并、文档签名信息串与文档打包处理; g.指纹鉴别单元,用于将指纹数据与存储的证人指纹数据进行对比,判断 A remote court during forensic system, wherein the system hardware by a portable remote terminal and the Multimedia provided evidence in court the media hosts which are connected via a computer network therebetween, said portable remote evidence multimedia terminal comprising: a.CPU, for switching, control and data processing system; B a touch screen for displaying a video, and documents, accepts input handwritten signature; C fingerprint reader, for entering witnesses fingerprint and fingerprint. wherein the coding unit is input to the fingerprinting;. d fingerprint memory for storing fingerprint feature encoding;. e memory a digital certificate, digital certificate evidence for storing multimedia portable remote terminal, the digital certificate used to sign the document signature information string, testimony to form a final digital document;. f document operation unit, for displaying the document content, the document summary to extract the signature handwriting image merged with the document, the document with the document signature information string packing process;. g fingerprinting means for witness the fingerprint data with fingerprint data stored in the comparison, determination 是否匹配; h.加密、解密单元,用于数据加、解密处理; 1.文件收发通信单元,用于侦测文件的到来和发送文件准备好的消息操作; 所述便携式远程多媒体取证终端中设有取证文件存储器; 取证按如下步骤进行: 庭审法官通过计算机网络与位于便携式远程多媒体取证终端前的远程证人进行法庭调查或质证,获取证言并将证言笔录传送到便携式远程多媒体取证终端,终端侦测到证言文档到来立即在屏幕上显示,证人对证言笔录进行核实,确认无误后通过触摸屏输入手写签名,加以确认,系统将证人签名数据嵌入到证言笔录文档中,形成签字后的文档并提取文档摘要,然后证人通过指纹采集器输入指纹,由系统提取其指纹特征码,系统对文档摘要、证人指纹特征码、签字时间进行合并变换形成文档签名字符串,最后利用数字证书将文档签名字符串加 Matches;. H encryption, decryption means for data encryption and decryption processing; 1. Despatch communication unit for transmitting files and detecting the arrival of the prepared message file operations; said portable remote terminal is provided multimedia forensics there is evidence file memory; forensics performed as follows: trial judge remotely via a computer network located in front of witnesses multimedia portable remote terminal forensic investigations or forensics cross-examination, and testimony Notes obtaining testimony to the portable multimedia forensics remote terminal, the terminal detection the testimony of documents coming immediately displayed on the screen, the witness testimony transcripts verify, confirm correct input handwritten signature via the touch screen, to confirm, the system will be embedded witness signature data to testimony transcripts document, documented the signature and extract the document summary and witness fingerprint input through a fingerprint reader, a fingerprint pattern extracted by the system, the system for document summary, witnesses the signature fingerprint, signature transformation time merge document signature string formed. Finally, the digital certificate signature will be appended to the document 签名后打包,形成证人证言最终数字文档,存入取证文件存储器中,并发送文档准备好的消息给法庭多媒体主机,由其下载后归档,取证过程即结束; 系统在对文档摘要、证人指纹特征码、签字时间进行合并变换处理时,按如下算法进行: 用F表示证人的指纹特征码,固定长度620字节;W表示文档数字摘要串,固定长度40字节;T表示签字时间字符串,固定长度14字节,H表示变换后的文档签名字符串,长度674字节,从指纹特征码串F第二个字符开始,先将文档数字摘要串W每字符逐个插入指纹特征码串F的两相邻字符之间,形成第一中间字符串S1,S1= (F1W1F2W2F3W3…F619F62tl),其中Fi为指纹特征码串F的第i个字符,Wj为文档数字摘要串W的第j个字符;然后将签字时间字符串T每字符逐个插入第一中间字符串SI中,得到第二中间字符串S2 ;将第二中间字符串S2的每个字符S After the signature package, the final form of digital documents witness testimony, forensic document into memory and sends the message to the court document prepared multimedia host, after downloading its archive, evidence collection process ends; summary in the document, the witness minutiae system time code, the time signature merging conversion processing, the following algorithm: signature fingerprint represents a witness, a fixed length of 620 bytes with F; W represents a digital document digest string, a fixed length of 40 bytes; T represents a time signature string, 14 byte fixed length, H represents the transformed document signature string, the length of 674 bytes starting from the signature fingerprint sequence F is the second character, the first digital document summary character string of each W is inserted by one of the fingerprint pattern string F between two adjacent characters, forming a first intermediate string S1, S1 = (F1W1F2W2F3W3 ... F619F62tl), where Fi is the i-th character string F is the signature fingerprint, digital document summary string of Wj is the j-th character W; the signature is then time T per character string one by one into the first intermediate string SI to obtain a second intermediate string S2; S2 of the second intermediate each character string S 2k (S2的第k个字符)取ASCII码ak,ak异或53得到bk,再将bk转换成字符Hk,形成文档签名字符串H,即H= (H1H2…H674X 2k (S2 k-th character) takes the ASCII code ak, ak XOR 53 obtained bk, bk and then converted into characters Hk, form document signature string H, i.e., H = (H1H2 ... H674X
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