KR101828234B1 - Electronic Control Unit - Google Patents

Electronic Control Unit Download PDF

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Publication number
KR101828234B1
KR101828234B1 KR1020160041422A KR20160041422A KR101828234B1 KR 101828234 B1 KR101828234 B1 KR 101828234B1 KR 1020160041422 A KR1020160041422 A KR 1020160041422A KR 20160041422 A KR20160041422 A KR 20160041422A KR 101828234 B1 KR101828234 B1 KR 101828234B1
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South Korea
Prior art keywords
index key
unit
changing
random number
electronic control
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KR1020160041422A
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Korean (ko)
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KR20170114482A (en
Inventor
김보현
Original Assignee
주식회사 다산네트웍스
주식회사 다산네트웍솔루션즈
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Application filed by 주식회사 다산네트웍스, 주식회사 다산네트웍솔루션즈 filed Critical 주식회사 다산네트웍스
Priority to KR1020160041422A priority Critical patent/KR101828234B1/en
Priority to PCT/KR2017/003742 priority patent/WO2017176052A1/en
Publication of KR20170114482A publication Critical patent/KR20170114482A/en
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Publication of KR101828234B1 publication Critical patent/KR101828234B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40052—High-speed IEEE 1394 serial bus
    • H04L12/40104—Security; Encryption; Content protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40267—Bus for use in transportation systems
    • H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The present invention relates to an encryption system of an electronic control unit for a vehicle, and in particular, it synchronizes the time of an internal timer with a time of an internal timer to change an index key based on an output signal of an internal timer.

Description

[0001] Vehicle electronic control system, apparatus and method based on time synchronization [0002]

And more particularly to an encryption technique between an electronic control unit (ECU) in a vehicle.

Vehicle electronic control devices transmit and receive data by using an Ethernet communication method. Ethernet has been developed based on an open networking architecture that is easily scalable at low cost. Therefore, in order to secure basic data confidentiality when using Ethernet communication, it is necessary to rely on higher protocol processing. Recently, MAC Sec technology has been released, but this also requires additional protocol procedures.

Due to the physical limitations of the vehicle electronic control unit, all functions other than essential functions are removed when the software is mounted. Therefore, it is difficult for the vehicle electronic control apparatus to secure the airtightness by utilizing the higher protocol.

Korean Patent Laid-Open Publication No. 10-2013-0040065 published on April 23, 2013 discloses an electronic apparatus and an encryption method thereof. The present invention provides a technique for generating a cipher text using a search term used for data search for key management for a public key and a private key applied to encryption.

However, this encryption method does not solve the problem of securing the airtightness of the above-described vehicle electronic control device.

      It is an object of the present invention to allow an electronic control unit for a vehicle to add an encryption key self-updating function to an existing encryption system.

The proposed technique is also proposed to secure confidentiality without an upper protocol in the vehicle electronic control device.

Furthermore, the proposed technique aims to prevent a vehicle accident by preventing hacking in data communication between vehicle electronic control devices.

According to one aspect, the vehicle electronic control apparatus includes a parameter DB for storing a parameter table indexed for each parameter, a random number generating unit for generating a random number, an index key generating unit for generating an index key based on a random number, An encryption unit for encrypting data according to the selected parameter, and an index key changing unit for changing the index key according to a predetermined change criterion.

According to still another aspect, the vehicular electronic control apparatus includes a change sequence storage section for storing sequence information including a change condition of the index key and a method of changing the index key, and the index key changing section changes the index key according to the sequence information.

According to another aspect, the vehicle electronic control apparatus includes a time synchronizing section for synchronizing the time of the internal timer with the grand master, and the index key selecting section includes an index key changing section for changing the index key based on the output signal of the internal timer do.

According to another aspect, the parameter table includes a hash method and a shuffling method.

 According to another aspect of the present invention, there is provided a decoding apparatus for decoding an encryption statement according to a selected parameter table.

According to one aspect, an encryption method of an automotive electronic control apparatus includes a random number generation step of generating a random number, an index key generation step of generating an index key based on a random number,

An index key changing step of changing an index key according to a preset change criterion, a parameter selecting step of selecting a parameter corresponding to the index key, and an encrypting step of encrypting data according to the selected parameter.

In another aspect, the encryption method includes an index key changing step of changing an index key based on an output signal of an internal timer synchronized in time with a grand master.

According to another aspect of the present invention, a method for decoding an electronic control unit for a vehicle includes receiving a random number, selecting an index key based on a received random number, selecting an index key, A parameter selecting step of selecting a parameter based on the index key, and a decoding step of decrypting the encrypted statement in accordance with the selected parameter.

According to one aspect, an encryption system of an automotive electronic control apparatus includes a random number generation unit for generating a random number, an index key generation unit for generating an index key based on a random number generated by the random number generation unit, and changing an index key based on an output signal of the internal timer An index key selection unit and an encryption unit for encrypting data according to a parameter corresponding to the changed index key; a random number reception unit for receiving a random number generated from the encryption-side vehicle electronic control unit; An index key selection unit for selecting an index key based on an output signal of the internal timer based on the output signal of the index timer and a decryption unit for decrypting the encryption key according to the parameter corresponding to the changed index key, .

According to the proposed invention, it is possible to synchronize the system of the vehicle electronic control apparatus with the time synchronization, and update the encryption key according to the synchronized time. This encryption key update can ensure airtightness in communication between the vehicle electronic control apparatuses without a separate key management protocol.

Also, the proposed technique can secure confidentiality by updating the encryption key in the encryption side device and the decryption side device by using IEEE1588 and IEEE 802.1AS.

1 is a block diagram showing the configuration of a vehicle electronic control apparatus according to an embodiment.
2 is a block diagram showing a configuration of a vehicle electronic control apparatus according to another embodiment.
3 is a block diagram showing a configuration of a vehicle electronic control apparatus according to another embodiment.
FIG. 4 is a table illustrating a security parameter index table according to an embodiment.
5 is a flowchart showing an encryption method of a vehicle electronic control apparatus according to an embodiment.
6 is a flowchart illustrating a method of decoding a vehicle electronic control apparatus according to an embodiment.
7 is a block diagram showing the configuration of an encryption system between vehicle electronic control apparatuses according to an embodiment.
8 is a flowchart showing a configuration of an encryption system of an electronic control unit for a vehicle according to another embodiment.

The foregoing and further aspects of the invention will become apparent through the following examples. The configurations of the selectively described embodiments or selectively described embodiments of the present invention may be freely combined with each other if they are not explicitly contradictory to those of ordinary skill in the art, I understand.

1 is a block diagram showing a schematic configuration of an electronic control unit for a vehicle according to an embodiment. 1, the vehicle electronic control apparatus includes a parameter DB 500, a random number generation unit 100, an index key generation unit 200, a parameter selection unit 300, and an encryption unit 400 .

In an aspect, the parameter DB 500 stores a plurality of parameters in a parameter table. Parameter refers to the data encryption method. Detailed configuration of parameters will be described later. The plurality of parameters included in the parameter table are each indexed. That is, the parameter DB 500 stores an index key corresponding to each parameter.

In one embodiment, the random number generation unit 100 generates a random number. For example, an integer or real number value is generated with the same probability from a range of values. The random number generation unit 100 makes the value of the next random number not be predictable from the generated random number value. The random number generation method of the specific random number generation unit 100 can be performed by a known technique, so that detailed description is omitted.

In one embodiment, the index key generation unit 200 may generate an index key based on a random number. For example, you can use the Mod operation to generate an index key from a random number. In the present invention, an index key means an encryption key and a decryption key in a general encryption system

The index key can be generated from the random number by using other known operations. As will be described later, the index key generating unit 200 may generate the index key based on the random number generated by the random number generating unit 100 of the device, or may generate the index key using the random number generating unit 100 of the other device, The index key can be generated based on the random number generated by the index key.

In one embodiment, the parameter selector 300 may select a parameter corresponding to the index key. In one embodiment, when the index key generator 200 generates an index key, the parameter selector 300 selects a parameter corresponding to the index key. As described above, in the parameter DB 500, a parameter table is indexed and stored. Therefore, by searching for an index stored in the parameter DB 500 corresponding to the index key generated by the index key generating unit 200, a parameter corresponding to the generated index key can be selected.

In one embodiment, the encryption unit 400 encrypts data according to the selected parameter. In one embodiment, the encrypting unit 400 transmits the encrypted ciphertext to the other electronic control unit through which the data is encrypted.

2 is a block diagram showing a configuration of an electronic control unit for a vehicle according to another embodiment.

As shown in the figure, the index key generating unit 200 includes an index key changing unit 201. In one embodiment, the vehicular electronic control apparatus includes a timer, a time synchronization unit 600, and a change sequence storage unit 501. [

In an aspect, the index key changing unit 201 changes the index key according to a predetermined change criterion. In one embodiment, the predetermined change criterion includes a change condition and a change method for causing the index key changing unit 201 to change the index key. As will be described later, the change condition may be a change time that causes a change to be made after a predetermined time elapses. The change method is a method of determining which index key to change the current index key to. In one embodiment, the index key changing unit 201 may change the index key generated by the index key generating unit 200 according to a predetermined changing method when a preset changing condition is satisfied. In one embodiment, the preset change criteria are inconsistent and irregular, which may make it impossible to predict changes in the index key.

In one embodiment, the change sequence storage unit 501 stores sequence information including a change condition of an index key and a change method. The above-described predetermined change criterion corresponds to the sequence information.

In one embodiment, the change condition may be a condition for changing the index key according to the position of the electronic control unit for the vehicle.

In another embodiment, the change condition may be a condition for changing the index key according to the type of data to be sent.

In one embodiment, the change condition of the sequence information may be change time information, and the change method may be change position information. For example, the sequence information is configured as follows.

{Change time 1, Offset (+/-)}, {Change time 2, Offset (+/-)}, {Change time 3, Offset (+/-)}, +/-)}

For example, the change time is configured in seconds, and the offset of the change position may be any positive value or negative value. The modification time and offset values can be configured in various ways without limitation.

According to an aspect, the index key changing unit 201 changes the index key according to the sequence information. For example, the case where the sequence information is composed of the above-mentioned change time and change position will be described. After the index key is selected based on the random number, if the time passes by the change period 1, the index key located away from the selected index key by + Offset or the index key located by -Offset can be changed. In one embodiment, the index key change unit 201 continuously changes the index key according to the change time reached until the encryption unit 400 receives the data. However, when the encryption unit 400 receives data, the parameter table selection unit does not change the index key any more, and selects the parameter table according to the index key at that time. For example, if the sequence information is {10 seconds, 1 (+)}, {13 seconds, 5 (-)}, {3 seconds, 4 , If the index key is selected as 1010, the index key becomes 1011 after 10 seconds and becomes 1006 again after 13 seconds. As described later, the modification time of the index key is sufficiently longer than the time required for the encryption unit 400 to transmit the ciphertext to the decryption unit 401 of the other electronic control unit for vehicle.

In an aspect, the time synchronization unit 600 synchronizes the time of the internal timer with that of the grand master. In one embodiment, the time synchronization unit 600 may synchronize the time of the internal timer included in the vehicle electronic control apparatus with the clock of the grand master of the vehicle. For example, the time synchronization uses IEEE1588 or IEEE 802.1AS technology, which is a configuration function of the vehicle AVB protocol.

In an additional aspect, the index key changing unit 201 further includes a time base changing unit. In one embodiment, the time base changing unit changes the index key based on the output signal of the internal timer. In one embodiment, the internal timer time-synchronized to the clock of the grand master outputs the time to the time base change unit in units of seconds. The time base change unit changes the index key every time a preset change time elapses, and determines whether a predetermined change time has elapsed based on the time signal output by the internal timer.

In one embodiment, the index key change unit 201 may further include a packet count based change unit. In one embodiment, the packet count based change unit may change the index key when the number of received packets reaches a predetermined count value.

3 is a block diagram showing a configuration of an electronic control unit for a vehicle according to another embodiment.

As shown, the vehicular electronic control apparatus according to one embodiment may include a communication unit, a random number receiving unit 700, and a decoding unit 401.

In one embodiment, the communication unit transmits and receives data with the electronic control unit for another vehicle. In one embodiment, the encryption statement output from the encryption unit 400 may be transmitted to the other electronic control unit through the communication unit. In another embodiment, the decryption unit 401 can receive the encryption statement transmitted from the other electronic control unit through the communication unit. According to another embodiment, the index key selection unit 200 may exchange sequence information stored in the change sequence storage unit 501 with change sequence information of an electronic control unit for another vehicle through a communication unit. Therefore, the same sequence information is stored between the electronic control units for vehicles communicating with each other.

In one embodiment, the random number receiving unit 700 receives a random number generated by an electronic control unit for another vehicle through a communication unit.

In an aspect, the decryption unit 401 includes a decryption unit 401 for decrypting the encrypted data in accordance with the selected parameter. In one embodiment, the vehicle electronic control apparatus receives an encrypted encryption statement from another apparatus communicating with the apparatus. As will be described later, the apparatus for performing decryption receives a random number from another apparatus that has performed encryption and generates an index key. The parameter is selected from the index key, and the decryption unit 401 decrypts the received encryption statement in accordance with the parameter and restores it into data. As described above, the change time of the index key is sufficiently longer than the time for transmitting the ciphertext from the encryption unit 400 to the decryption unit 401 of the other electronic control unit for vehicle. As a result, the index key used when the cipher text is generated by the device that created the cipher text is the same as the index key used when the device receiving the cipher text decrypts the cipher text. Therefore, the first data can be restored by encrypting the data with the same parameters corresponding to the same index key and decrypting the corresponding ciphertext again.

4 shows a parameter table according to one embodiment. As shown in the figure, the index table corresponds to each parameter.

In one aspect, the parameter table comprises a hash method and a shuffling method. For example, the hashing method may be MD5, SHA-1, HMAC, LCR. The shuffling method may be, for example, ROTATE-L-N, ROTATE-R-N, XOR, As shown in FIG. 4, the parameter table can be configured in various combinations of the hash method and the shuffling method described above. The index key shown in FIG. 4 is an embodiment, and may be a letter or a combination of numbers.

In one embodiment, the encryption unit 400 and the decryption unit 401 encrypt or decrypt data according to the hash method and the shuffling method included in the selected parameter table. For example, the encryption unit 400 shuffles the payload according to the shuffling method included in the selected parameter table.

5 is a flowchart showing a configuration of a method for encrypting a vehicle electronic control apparatus according to an embodiment.

The encryption method according to one aspect first includes a random number generation step of generating a random number.

And then generating an index key based on the random number.

And thereafter, an index key changing step of changing the index key according to a preset reference. In one embodiment, the index key changing step changes the index key according to the sequence information.

And thereafter, a parameter selection step of selecting a parameter corresponding to the index key.

And then encrypting the data according to the selected parameter.

In an aspect, the encryption method of the vehicle electronic control apparatus may include an index key changing step of changing an index key based on an output signal of an internal timer synchronized in time with the grand master.

6 is a flowchart showing a configuration of a method for decrypting a vehicle electronic control apparatus according to an embodiment. The decoding method according to an embodiment first includes receiving a random number.

And then generating an index key based on the received random number.

And thereafter, an index key changing step of changing the index key according to a preset reference. In one embodiment, the index key changing step changes the index key according to the sequence information including the change condition of the index key and the method of changing the index key. The details are as described above.

And thereafter, a parameter selection step of selecting a parameter based on the index key.

And then decrypting the encrypted statement according to the selected parameter.

In an aspect, an encryption method of an automotive electronic control apparatus includes an index key changing step of changing an index key based on an output signal of an internal timer synchronized with a time of a grand master.

7 is a block diagram showing an encryption system of an electronic control unit for a vehicle according to an embodiment. As shown in the figure, the encryption system of the vehicle electronic control apparatus is composed of a grand master, an encryption-side vehicle electronic control apparatus, and a decryption-side vehicle electronic control apparatus. In one embodiment, the electronic control unit for vehicles communicating with each other is a side for encrypting data on the encryption side and a side for decrypting ciphertext on the decryption side. Therefore, one vehicle electronic control apparatus may be an encryption side or a decryption side. In one embodiment, both vehicle electronic control apparatuses communicating with each other are time synchronized with the clock of the grand master.

8 is a flowchart showing a configuration of an encryption system of an electronic control unit for a vehicle according to another embodiment.

The vehicle electronic control apparatus includes a parameter DB 500, a parameter selector 300, and a time synchronization unit 600.

In one embodiment, the parameter DB 500 stores a parameter table in which a plurality of parameters are indexed.

In one embodiment, the parameter selector 300 selects a parameter corresponding to the index key.

In one embodiment, the time synchronization unit 600 synchronizes the time of the internal timer with the time of the grand master.

In one aspect, the encryption-side vehicle electronic control apparatus includes a random number generation unit 100, an index key selection unit 200, and an encryption unit 400.

In one embodiment, the random number generation unit 100 generates a random number. In one embodiment, the generated random number is transmitted to the decryption-side on-vehicle electronic control unit.

In one embodiment, the index key selector 200 selects the index key based on the random number generated by the random number generator 100, and changes the index key based on the output signal of the internal timer. As described above, the internal timer is time-synchronized with the grand master clock. The index key selection unit 200 changes the index key to be located at the changed position every time the time output by the internal timer reaches the change time.

The encryption unit 400 according to an exemplary embodiment encrypts data according to the selected parameter table. That is, the encryption unit 400 encrypts the data according to the parameter corresponding to the changed index key.

The decryption-side vehicle electronic control apparatus according to an aspect includes a random number receiving unit 700, an index key selecting unit 200, and a decoding unit 401.

The random number receiving unit 700 according to an aspect receives a random number generated from the encrypting-side vehicle electronic control unit.

The index key selector 200 according to an aspect generates an index key based on the received random number, and changes the index key based on the output signal of the internal timer. The details are as described above.

The decryption unit 401 according to an embodiment decrypts the encrypted statement according to the selected parameter. That is, the decryption unit 401 decrypts the encrypted statement according to the parameter corresponding to the changed index key.

It will be apparent to those skilled in the art that various modifications, changes, and substitutions are possible, without departing from the essential characteristics and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: a random number generation unit 200: an index key generation unit
201: Index key changing unit 300: Parameter selecting unit
400: Encryption unit 401: Decryption unit
500: Parameter DB 501: Change sequence storage unit
600: time synchronization unit 700: random number reception unit

Claims (9)

A parameter DB for storing a parameter table indexed for each parameter;
A random number generator for generating a random number;
An index key generation unit for generating an index key based on a random number;
A change sequence storage unit for storing sequence information including a condition for changing the index key and a method for changing the same between devices communicating with each other;
A parameter selection unit for selecting a parameter corresponding to the index key;
And an encryption unit for encrypting the data according to the selected parameter,
Wherein the index key generating unit comprises: an index key changing unit for changing the index key according to the sequence information similarly preset between the communicating apparatuses;
And an electronic control unit.
delete 2. The vehicle electronic control apparatus according to claim 1,
And a time synchronization unit for synchronizing the time of the internal timer with that of the grand master,
The index key changing unit
A time base change unit for changing an index key based on an output signal of the internal timer;
And an electronic control unit.
2. The method of claim 1,
A vehicle electronic control apparatus comprising a hash method and a shuffling method.
2. The vehicle electronic control apparatus according to claim 1,
A decryption unit for decrypting the encryption statement according to the selected parameter;
And an electronic control unit for controlling the vehicle.
A random number generation step of generating a random number;
An index key generating step of generating an index key based on a random number;
An index key changing step of changing an index key in accordance with sequence information including a change condition and a change method of an index key previously set in advance among communication devices;
A parameter selecting step of selecting a parameter corresponding to the index key;
An encryption step of encrypting data according to the selected parameter;
And an encryption step of encrypting the electronic control device.
7. The method of claim 6, wherein the index key changing step
An index key changing step of changing an index key based on an output signal of an internal timer synchronized in time with a grand master;
And an encryption step of encrypting the electronic control device.
Receiving a random number;
An index key generating step of generating an index key based on the received random number;
An index key changing step of changing an index key in accordance with sequence information including a change condition and a change method of an index key previously set in advance among communication devices;
A parameter selecting step of selecting a parameter corresponding to the index key;
A decoding step of decoding data according to the selected parameter;
And decrypting the electronic control device.
An encryption system of an electronic control unit for a vehicle,
A random number generator for generating a random number,
An index key generating unit for generating an index key based on the random number generated by the random number generating unit and changing an index key according to sequence information including a changing condition and a changing method of the same preset index key, And
And an encryption unit encrypting data according to the parameter corresponding to the changed index key;
A random number receiver for receiving the generated random number from the encryption-side vehicle electronic controller,
An index key generating unit for generating an index key based on the received random number and changing an index key according to sequence information including a changing condition and a changing method of the same preset index key among communication devices;
And a decryption unit decrypting the encrypted statement according to the parameter corresponding to the changed index key.
KR1020160041422A 2016-04-05 2016-04-05 Electronic Control Unit KR101828234B1 (en)

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PCT/KR2017/003742 WO2017176052A1 (en) 2016-04-05 2017-04-05 Vehicle electronic control system, unit, and method on basis of time synchronization

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KR101888548B1 (en) * 2018-05-08 2018-08-14 (주)위즈네트 Random number generation method, random number generation device and communication apparatus comprising the device
CN111866015B (en) * 2020-07-29 2022-04-29 中国联合网络通信集团有限公司 Vehicle information updating method and device

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KR20130040065A (en) * 2011-10-13 2013-04-23 삼성전자주식회사 Electric apparatus and encrytion method thereof
KR101523760B1 (en) * 2013-07-22 2015-05-28 주식회사 이와이엘 Immobilizer apparatus using random pulse generation and authentication method thereof

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JP2006227916A (en) * 2005-02-17 2006-08-31 Canon Inc Information processor, information search method, program, and storage medium
KR101549034B1 (en) * 2012-08-17 2015-09-01 고려대학교 산학협력단 Method for guarantying the confidentiality and integrity of a data in Controller Area Networks

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