CN204347841U - A kind of fingerprint identification device - Google Patents
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Abstract
本实用新型实施例公开了一种指纹识别装置，应用于指纹识别技术领域，降低指纹信息被破解或读取的风险，提高用户指纹信息的安全性。本实用新型实施例中，所述装置包括指纹传感器、智能卡和微控制器；所述智能卡中预存用户的指纹模板，所述指纹模板由智能卡初次使用时生成的第一密钥加密；所述指纹传感器，用于采集用户的指纹图像并将采集的指纹图像传输至智能卡；所述智能卡，用于接收指纹传感器采集的指纹图像；将所述指纹图像加密后发送至所述微控制器；智能卡与微控制器每次数据传输均使用不同的密钥；所述微控制器，用于解密智能卡发送的加密指纹图像，提取出指纹图像的图案特征；最后有智能卡比对提取的图像特征与指纹模板以识别指纹。
The embodiment of the utility model discloses a fingerprint identification device, which is applied in the technical field of fingerprint identification, reduces the risk of fingerprint information being cracked or read, and improves the security of user fingerprint information. In the embodiment of the present invention, the device includes a fingerprint sensor, a smart card and a microcontroller; the smart card pre-stores the user's fingerprint template, and the fingerprint template is encrypted by the first key generated when the smart card is used for the first time; the fingerprint The sensor is used to collect the fingerprint image of the user and transmit the collected fingerprint image to the smart card; the smart card is used to receive the fingerprint image collected by the fingerprint sensor; the fingerprint image is encrypted and sent to the microcontroller; the smart card and The microcontroller uses a different key for each data transmission; the microcontroller is used to decrypt the encrypted fingerprint image sent by the smart card and extract the pattern features of the fingerprint image; finally, the smart card compares the extracted image features with the fingerprint template to identify fingerprints.
Description
技术领域technical field
本实用新型涉及指纹识别技术领域，尤其涉及一种指纹识别装置。The utility model relates to the technical field of fingerprint identification, in particular to a fingerprint identification device.
背景技术Background technique
指纹是手指皮肤上特有的花纹，由皮肤上的隆起线构成。这些隆起线的起点、终点、分叉、结合被称为细节特征点。隆起线的这种细节特征有无数种排列，因此，每个人的指纹甚至一个指纹的每条隆起线都是独特的，具有不可替代性，因此，通过指纹进行身份鉴定具有很高的安全性。也逐渐被应用在金融、公安、门禁、户籍管理等领域。Fingerprints are unique patterns on the skin of the fingers, made up of raised lines on the skin. The starting point, ending point, bifurcation, and combination of these raised lines are called detail feature points. There are countless permutations of such detailed features of ridge lines. Therefore, each person's fingerprint or even each ridge line of a fingerprint is unique and irreplaceable. Therefore, identification through fingerprints has high security. It has also been gradually applied in fields such as finance, public security, access control, and household registration management.
由于指纹的识别多被用于安全应用领域，因此保证指纹信息的安全性十分重要。而现有技术中在使用指纹的过程中，对用户指纹信息的保护力度不够，用户指纹信息被非法读取的风险较大。Since fingerprint identification is mostly used in security applications, it is very important to ensure the security of fingerprint information. However, in the process of using fingerprints in the prior art, the protection of user fingerprint information is not strong enough, and the risk of user fingerprint information being illegally read is relatively high.
实用新型内容Utility model content
由于现有技术对用户指纹信息保护没有采取有效的方法，使得用户的指纹信息通过线路监听、软件破解等方法被窃取，又或者由于设备提供商或系统建设商的考虑不周，内部人员动机不纯，而导致指纹信息泄漏的风险较高。有鉴于此，非常需要一种改进的指纹识别装置，以解决现有技术中用户指纹信息被窃取或者被泄露的技术问题，降低指纹信息被窃取的风险，提高用户指纹信息的安全性。Because the existing technology does not take an effective method for the protection of user fingerprint information, the user's fingerprint information is stolen through methods such as line monitoring and software cracking, or due to poor consideration by equipment providers or system builders, internal personnel have insufficient motivation. Pure, which leads to a higher risk of fingerprint information leakage. In view of this, there is a great need for an improved fingerprint identification device to solve the technical problem that user fingerprint information is stolen or leaked in the prior art, reduce the risk of fingerprint information being stolen, and improve the security of user fingerprint information.
本实用新型的实施方式提供一种指纹识别装置，例如可以包括：Embodiments of the present utility model provide a fingerprint recognition device, for example, may include:
指纹传感器、智能卡和微控制器；所述智能卡中预存由第一密钥加密的用户指纹模板；所述第一密钥根据智能卡初次使用时生成的真随机数通过加密算法生成；其中，智能卡与微控制器每进行一次数据传输之前通过随机数交互生成临时密钥对，以便于对传输数据进行加解密；Fingerprint sensor, smart card and microcontroller; the user fingerprint template encrypted by the first key is pre-stored in the smart card; the first key is generated by an encryption algorithm according to the true random number generated when the smart card is used for the first time; wherein, the smart card and The microcontroller generates a temporary key pair through random number interaction before each data transmission, so as to encrypt and decrypt the transmitted data;
所述指纹传感器，用于采集用户的指纹图像并将采集的指纹图像传输至智能卡；The fingerprint sensor is used to collect the fingerprint image of the user and transmit the collected fingerprint image to the smart card;
所述智能卡，用于接收指纹传感器采集的指纹图像；将所述指纹图像加密后发送至所述微控制器；The smart card is used to receive the fingerprint image collected by the fingerprint sensor; encrypt the fingerprint image and send it to the microcontroller;
所述微控制器，用于解密智能卡发送的加密指纹图像，提取出指纹图像的图像特征；将所述图像特征加密后发送至智能卡；以便智能卡将图像特征与指纹模板作比对。The microcontroller is used to decrypt the encrypted fingerprint image sent by the smart card, and extract the image features of the fingerprint image; encrypt the image features and send them to the smart card; so that the smart card compares the image features with the fingerprint template.
优选的，所述指纹传感器和所述智能卡封装为一体。Preferably, the fingerprint sensor and the smart card are packaged as one.
优选的，所述指纹传感器和所述智能卡通过SIP叠封技术封装为一体。Preferably, the fingerprint sensor and the smart card are packaged as one by SIP lamination technology.
优选的，所述指纹采传感器与智能卡之间通过高速数据接口连接。Preferably, the fingerprint sensor is connected to the smart card through a high-speed data interface.
优选的，所述智能卡还用于根据指纹模板的比对结果更新预存的指纹模板。Preferably, the smart card is also used to update the pre-stored fingerprint template according to the comparison result of the fingerprint template.
优选的，所述微控制器为高性能微控制器。Preferably, the microcontroller is a high-performance microcontroller.
优选的，所述微控制器内存中的数据采用第二密钥加密后的密文形式存储；Preferably, the data in the microcontroller memory is stored in ciphertext encrypted by the second key;
其中，第二密钥在微控制器每次上电时生成，每次上电生成的第二密钥不同。Wherein, the second key is generated each time the microcontroller is powered on, and the second key generated each time the power is turned on is different.
优选的，所述第二密钥由微控制器通过对智能卡发送的真随机数进行分散处理后与微控制器生成的真随机数通过预设算法生成。Preferably, the second key is generated by the micro-controller through a preset algorithm through decentralized processing of the true random number sent by the smart card and the true random number generated by the micro-controller.
从以上技术方案可以看出，本实用新型实施例具有以下优点：As can be seen from the above technical solutions, the utility model embodiment has the following advantages:
本实用新型实施例中，指纹模板被加密存储在智能卡内，智能卡本身具有较高的安全识别功能，在一定程度上可以提高指纹数据的安全性。另外，指纹模板加密使用的第一密钥是根据智能卡初次使用时生成的真随机数通过加密算法生成，由于外界无法获知智能卡初次使用生成的真随机数，所以即使是系统和设备提供商也无从得知该密钥，而且对于不同的用户来说该密钥不同，进一步提高了用户指纹信息存储的安全性。再者，智能卡与微处理器通信时，每次都需要针对本次数据传输生成临时密钥对，由临时密钥对数据进行加解密。每次通信使用的密钥不同，增加了数据被破解的难度，提高了数据传输的安全性。通过本实施例提供的技术方案，降低了密钥被破解、数据被读取的风险，提高了指纹信息的安全性。In the embodiment of the utility model, the fingerprint template is encrypted and stored in the smart card, and the smart card itself has a relatively high security identification function, which can improve the security of fingerprint data to a certain extent. In addition, the first key used for fingerprint template encryption is generated by an encryption algorithm based on the true random number generated when the smart card is used for the first time. Since the outside world cannot know the true random number generated by the smart card for the first time, even system and equipment providers have no way The key is known, and the key is different for different users, which further improves the security of user fingerprint information storage. Furthermore, when the smart card communicates with the microprocessor, a temporary key pair needs to be generated for this data transmission every time, and the data is encrypted and decrypted by the temporary key. Different keys are used for each communication, which increases the difficulty of data being cracked and improves the security of data transmission. Through the technical solution provided by this embodiment, the risk of key being cracked and data being read is reduced, and the security of fingerprint information is improved.
附图说明Description of drawings
图1为本实用新型实施例中指纹识别装置实施例的结构示意图；Fig. 1 is the structural representation of the fingerprint recognition device embodiment in the utility model embodiment;
图2为图1所示装置的工作图。Fig. 2 is a working diagram of the device shown in Fig. 1 .
具体实施方式Detailed ways
本实用新型实施例提供了一种指纹识别装置，能够提高用户指纹数据的安全性，降低指纹数据被窃取或者被泄露的风险。The embodiment of the utility model provides a fingerprint identification device, which can improve the security of user fingerprint data and reduce the risk of fingerprint data being stolen or leaked.
为了使本技术领域的人员更好地理解本实用新型方案，下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分的实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本实用新型保护的范围。In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
参阅图1，本实用新型实施例中一种指纹识别装置实施例1的结构示意图，所述装置可以包括指纹传感器11、智能卡12和微控制器13。其中指纹传感器11和智能卡12连接，智能卡12和微控制器13连接。Referring to FIG. 1 , it is a schematic structural diagram of Embodiment 1 of a fingerprint identification device in an embodiment of the present invention. The device may include a fingerprint sensor 11 , a smart card 12 and a microcontroller 13 . Wherein the fingerprint sensor 11 is connected with the smart card 12 , and the smart card 12 is connected with the microcontroller 13 .
所述智能卡中预存由第一密钥加密的用户指纹模板；所述第一密钥根据智能卡初次使用时生成的真随机数通过加密算法生成；其中，智能卡与微控制器每进行一次数据传输之前通过随机数交互生成临时密钥对，以便于对传输数据进行加解密。The user fingerprint template encrypted by the first key is pre-stored in the smart card; the first key is generated by an encryption algorithm according to a true random number generated when the smart card is used for the first time; wherein, before each data transmission between the smart card and the microcontroller A temporary key pair is generated through random number interaction to facilitate encryption and decryption of transmitted data.
具体的，所述指纹传感器11，用于采集用户的指纹图像并将采集的指纹图像传输至智能卡；Specifically, the fingerprint sensor 11 is used to collect the fingerprint image of the user and transmit the collected fingerprint image to the smart card;
所述智能卡12，用于接收指纹传感器采集的指纹图像；将所述指纹图像加密后发送至所述微控制器；The smart card 12 is configured to receive a fingerprint image collected by a fingerprint sensor; encrypt the fingerprint image and send it to the microcontroller;
所述微控制器13，用于解密智能卡发送的加密指纹图像，提取出指纹图像的图像特征；将所述图像特征加密后发送至智能卡；以便智能卡将图像特征与指纹模板作比对。The microcontroller 13 is used to decrypt the encrypted fingerprint image sent by the smart card, and extract the image features of the fingerprint image; encrypt the image features and send them to the smart card; so that the smart card compares the image features with the fingerprint template.
本实施例中所述的指纹图像特征是指由指纹图像处理后提取的图像中包含关进信息的点(比如可以完整表示一个用户指纹的一些点)。指纹模板是指由用户录入指纹时的多次图像特性合成的可以代表用户手指指纹的数据集合。智能卡存储指纹模板使用的第一密钥生成使用的算法可以是目前密码学中经常使用的一些算法，比如AES(Advanced Encryption Standard，高级加密标准)算法、国密SM4算法等，这里不作具体限定。另外，生成第一密钥时除了所述真随机数外，还可以结合其他辅助信息生成，比如智能卡的根密钥、序列号等信息。The fingerprint image features described in this embodiment refer to the points (for example, some points that can fully represent a user's fingerprint) in the image extracted from the fingerprint image after processing. Fingerprint template refers to the data set that can represent the user's finger fingerprint synthesized by multiple image characteristics when the user enters the fingerprint. The algorithm used to generate the first key used by the smart card to store the fingerprint template can be some algorithms commonly used in cryptography, such as the AES (Advanced Encryption Standard, Advanced Encryption Standard) algorithm, the national secret SM4 algorithm, etc., which are not specifically limited here. In addition, when generating the first key, in addition to the true random number, it can also be generated in combination with other auxiliary information, such as the root key and serial number of the smart card.
需要说明的是，智能卡与微控制器进行的通信采用“一次一密”的方式进行，即智能卡与微控制器每进行一次数据传输之前均通过随机数交互生成临时密钥对，发送数据的一端使用临时密钥中的加密密钥对发送数据进行加密，数据接收端使用解密密钥对数据进行解密。比如，智能卡发送加密的指纹图像，微控制器以对应的解密密钥对指纹图像进行解密。同样的，当智能卡对指纹图像特征与指纹模板进行比对时，微控制器在将指纹图像特征发送智能卡之前也需要通过实时生成的临时密钥对图像特征进行加密，智能卡对图像特征进行解密，然后作与指纹模板的比对。数据传输使用的密钥都是临时生成的，增加了数据传输的安全性，同时降低了数据被破解的风险。It should be noted that the communication between the smart card and the microcontroller is carried out in a "one-time secret" method, that is, before each data transmission between the smart card and the microcontroller, a temporary key pair is generated through random number interaction, and the end of the sending data Use the encryption key in the temporary key to encrypt the sent data, and the data receiver uses the decryption key to decrypt the data. For example, the smart card sends an encrypted fingerprint image, and the microcontroller uses the corresponding decryption key to decrypt the fingerprint image. Similarly, when the smart card compares the fingerprint image features with the fingerprint template, the microcontroller also needs to encrypt the image features with a temporary key generated in real time before sending the fingerprint image features to the smart card, and the smart card decrypts the image features. Then compare with the fingerprint template. The keys used for data transmission are all temporarily generated, which increases the security of data transmission and reduces the risk of data being cracked.
本实施例中，指纹模板存储在智能卡内且从未被读出，智能卡本身具有高安全性，一定程度上可以保证指纹模板的安全。另外，指纹模板存储时由第一密钥加密，第一密钥根据智能卡初次使用时生成的真随机数通过加密算法生成，外界无法获知智能卡初次使用生成的真随机数，所以即使是系统和设备提供商也无从得知该密钥，用户指纹数据不会被泄露。其次智能卡与微处理器采用“一次一密”的方式进行通信，增加了数据传输的安全性，数据被破解的难度增大，装置应对指纹数据被窃取的能力增强，保证了指纹信息的安全。In this embodiment, the fingerprint template is stored in the smart card and has never been read out. The smart card itself has high security and can guarantee the security of the fingerprint template to a certain extent. In addition, when the fingerprint template is stored, it is encrypted by the first key. The first key is generated by an encryption algorithm based on the true random number generated when the smart card is used for the first time. The outside world cannot know the true random number generated by the smart card when it is used for the first time. The provider has no way of knowing the key, and user fingerprint data will not be leaked. Secondly, the smart card and the microprocessor communicate in a "one-time-one-pass" manner, which increases the security of data transmission, increases the difficulty of data being cracked, and enhances the device's ability to deal with fingerprint data being stolen, ensuring the security of fingerprint information.
在实施例1的基础上，优选的，用户在接触指纹传感器的过程中，接触的角度以及接触面积随着时间会形成一种习惯，所以智能卡在识别指纹的时候，可以对指纹模板进行更新，所述更新可以包括增加指纹图像特征、替换指纹图像特征等。所述的替换指纹图像可以理解为，用户初次使用该装置时有可能与后期形成的习惯差距较大，替换后可以减小微处理器以及智能卡的运算压力。On the basis of Embodiment 1, preferably, when the user touches the fingerprint sensor, the angle of contact and the contact area will form a habit over time, so when the smart card recognizes the fingerprint, the fingerprint template can be updated. The update may include adding fingerprint image features, replacing fingerprint image features, and the like. The replacement of the fingerprint image can be understood as that when the user uses the device for the first time, there may be a large gap with the habit formed later, and the replacement can reduce the computing pressure of the microprocessor and the smart card.
所述指纹传感器与智能卡之间通过高速数据接口连接且二者采用SIP(System In a Package，系统级封装)叠封技术封装为一体，一体化的注塑封装，可以避免探针等监听方式窃取指纹数据，进一步提高指纹识别过程中的数据安全性。The fingerprint sensor and the smart card are connected through a high-speed data interface, and the two are packaged together by SIP (System In a Package, system-level packaging) technology. The integrated injection molding package can avoid stealing fingerprints by monitoring methods such as probes data, further improving data security in the process of fingerprint identification.
智能卡的数据处理能力有限，指纹图像特征的提取等处理在微控制器内进行，由于指纹图像的处理比较复杂，运算量较大，所以这里选用高性能微控制器(比如STM32F4系列高性能微控制器)进行指纹图像的处理，可以提高数据的处理能力以及数据处理速度。The data processing capacity of the smart card is limited, and the processing such as the extraction of fingerprint image features is carried out in the microcontroller. Since the processing of the fingerprint image is more complicated and the amount of calculation is large, a high-performance microcontroller (such as STM32F4 series high-performance microcontroller) is selected here. device) to process the fingerprint image, which can improve the data processing capability and data processing speed.
微控制器要处理大量的指纹数据，会产生大量中间数据(比如内存数据)，微控制器采用密文存储方式提高这些数据的安全性，微控制器采用第二密钥对这些数据加密，第二密钥的生成方式可以参照临时密钥的生成方式，这里不再赘述。第二密钥在微控制器每次上电时生成，且每次上电生成的第二密钥不同，增加了非法用户窃取用户指纹数据的难度。基于上述对指纹识别装置的描述，参考图2所示，为所述装置的工作流图。The microcontroller needs to process a large amount of fingerprint data, which will generate a large amount of intermediate data (such as memory data). The microcontroller uses ciphertext storage to improve the security of these data. The microcontroller uses the second key to encrypt these data. The generation method of the second key can refer to the generation method of the temporary key, and will not be repeated here. The second key is generated each time the microcontroller is powered on, and the second key generated each time the power is turned on is different, which increases the difficulty for illegal users to steal user fingerprint data. Based on the above description of the fingerprint recognition device, refer to FIG. 2 , which is a workflow diagram of the device.
以上所述，以上实施例仅用以说明本实用新型的技术方案，而非对其限制；尽管参照前述实施例对本实用新型进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本实用新型各实施例技术方案的精神和范围。As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model .
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| CN201420870055.3U CN204347841U (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016202130A1 (en) * | 2015-06-17 | 2016-12-22 | 广州市巽腾信息科技有限公司 | Device for image information collection and encryption method therefor |
| CN106372585A (en) * | 2016-08-29 | 2017-02-01 | 广州御银科技股份有限公司 | Portable fingerprint identification apparatus |
| CN110532749A (en) * | 2019-08-30 | 2019-12-03 | 捷德（中国）信息科技有限公司 | Fingerprint recognition processing unit, method and smart card |
-
2014
- 2014-12-31 CN CN201420870055.3U patent/CN204347841U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016202130A1 (en) * | 2015-06-17 | 2016-12-22 | 广州市巽腾信息科技有限公司 | Device for image information collection and encryption method therefor |
| CN106372585A (en) * | 2016-08-29 | 2017-02-01 | 广州御银科技股份有限公司 | Portable fingerprint identification apparatus |
| CN110532749A (en) * | 2019-08-30 | 2019-12-03 | 捷德（中国）信息科技有限公司 | Fingerprint recognition processing unit, method and smart card |
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