CN104527535B - A kind of automotive license plate of band encryption QR Quick Response Code - Google Patents

Abstract

The invention discloses the automotive license plate of a kind of band encryption QR Quick Response Code, it is characterized in that automotive license plate front comprises encryption QR Quick Response Code ciphertext graph picture and car plate trade mark word.The automotive license plate of the present invention be possible not only to realize intelligent transportation system quickly, accurately identify automotive license plate, improve accuracy rate and the time efficiency of identification, reduce the consuming of manual identified；And use encryption QR Quick Response Code to play the strongest antiforge function, reduce the harmful effect of ghost car plate；In addition, the present invention is that intelligent traffic administration system provides car plate QR 2 D code information interface, for research and development associated portable equipment, it is achieved traffic police is intelligent, unitized, lighting provides possibility, has a extensive future.

Description

A kind of automotive license plate of band encryption QR Quick Response Code

Technical field

The present invention relates to field of data encryption, the automotive license plate of a kind of band encryption QR Quick Response Code.

Background technology

In modern society, Quick Response Code is a key of all information datas, applies quite varied, such as product false proof, traces to the source, The download of web site url, data, E-business applications, vehicle management, information transmission etc..And popularizing along with smart mobile phone, respectively Plant similar smart mobile phone and sweep the application sweeping function so that Quick Response Code uses more universal.Therefore the band being prone to image recognition is made The automotive license plate of encryption QR Quick Response Code has feasibility.

The quantity of present stage motor vehicle increases year by year, the problem that road traffic becomes people's growing interest.Ask for solving road traffic Topic, intelligent transportation system is arisen at the historic moment as the new transport system of a kind of precise and high efficiency.License plate recognition technology is intelligent transportation system The foundation of system.On the one hand, the information comprised due to very widely used today automotive license plate is single, especially rain, mist, In the case of snow sky, night or car plate are stained, existing license plate recognition technology recognition accuracy is inadequate, often or by artificial knows Do not complete so that information processing bottleneck occurs in whole intelligent transportation system, increased the weight of the operating pressure of vehicle supervision department, time-consumingly Arduously, efficiency is low.On the other hand, due to existing license plate be simple to manufacture, with low content of technology, the most not false proof Function, the most many lawless persons are very easy to forge ghost license plate, thus produce serious public security problem.Thus may be used Seeing, above-mentioned existing license plate still has many defects, it would be highly desirable to improve.

Summary of the invention

The present invention is the weak point overcoming prior art to exist, and proposes the automotive license plate of a kind of band encryption QR Quick Response Code, to Intelligent transportation system can be realized and identify automotive license plate quickly and accurately, and improve automotive license plate antiforge function.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that

The automotive license plate of a kind of band of present invention encryption QR Quick Response Code, described automotive license plate comprises car plate trade mark information character string s；Its Feature is: be embedded with the ciphertext graph picture of encryption QR Quick Response Code in described automotive license plate.

The feature of the automotive license plate of band of the present invention encryption QR Quick Response Code lies also in:

The ciphertext graph of described encryption QR Quick Response Code seems to generate as follows:

Step 1, initialization

Step 1.1, utilize the coding rule of QR Quick Response Code that described car plate trade mark information character string s is encoded, it is thus achieved that encryption Initial Q R code 0-1 row vector A₁=[a₁,a₂,…,a_h,…,a_N]；a_hRepresent the h element；N represents described encryption initial Q R Code 0-1 row vector A₁The sum of middle element；

Step 1.2, utilize formula (1) obtain encryption revise QR code 0-1 row vector A₂:

A₂=randperm (A₁) (1)

In formula (1), randperm (A₁) represent described encryption initial Q R code 0-1 row vector A₁In element random alignment；

Step 1.3, utilize formula (2) obtain S Wolffram invertible element cellular automaton kth evolution rule r_k:

r_k=rand (m, n) (2)

In formula (2), m, n represent positive integer, and have 1≤m≤n≤256；Rand () represents random function；

Step 1.4, repeated execution of steps 1.3, thus obtain the encryption evolution rule sequence that K evolution rule is constituted R_en={ r₁,r₂,…,r_k,…,r_K}；1≤k≤K；

Step 1.5, formula (3) is utilized to obtain the kth evolution rule r of described S Wolffram invertible element cellular automaton_kEvolution number of times N_k:

N_k=rand (1, N^*) (3)

In formula (3), N^*Represent a positive integer；

Step 1.6, repeated execution of steps 1.5, thus obtain the encryption evolution time Number Sequence that K evolution number of times is constituted I_en={ N₁,N₂,…,N_k,…,N_K}；

Step 2, encrypt described car plate trade mark information character string

Step 2.1, definition cyclic variable x, x: th encryption cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1； 1≤x≤K；And initialize x=1；Then x: th encryption cellular state value A_xIt is described encryption initial Q R code 0-1 row vector A₁； (x+1)th time encryption cellular state value A_x+1It is described encryption and revises QR code 0-1 row vector A₂；

Step 2.2, by described x: th encrypt cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1As described S The x: th encryption initial state value of Wolffram invertible element cellular automaton；

Step 2.3, from described encryption evolution rule sequence R_enIn choose x-th evolution rule r_xInitial to the encryption of described x: th State value carries out N_xSecondary evolution, it is thus achieved that+2 encryption cellular state value A of xth_x+2；

Step 2.4, judge that x+1 is whether beyond threshold k；The most then exit execution, thus obtain the of invertible element cellular automaton K+1 encryption cellular state value A_K+1With the K+2 time encryption cellular state value A_K+2；Otherwise, the value of x+1 is assigned to x； And return step 2.2 and perform；

Step 2.5, by described the K+1 time encryption cellular state value A_K+1With the K+2 time encryption cellular state value A_K+2Constitute Encryption QR code 0-1 row vector D=[A_K+2,A_K+1]；

Step 3, generation ciphertext graph picture

Step 3.1, utilize QR Quick Response Code decoding rule described encryption QR code 0-1 row vector D is decoded, it is thus achieved that Car plate trade mark information ciphertext character string s'；

Step 3.2, utilize QR image in 2 D code maker, described car plate trade mark information ciphertext character string s' is generated described in add The ciphertext graph picture of close QR Quick Response Code.

The ciphertext graph of described encryption QR Quick Response Code seems to be read out as follows:

Step 1, identify the ciphertext graph picture of described encryption QR Quick Response Code

Step 1.1, scan the ciphertext graph picture of described encryption QR Quick Response Code, it is thus achieved that described car plate trade mark information ciphertext character string s'；

Step 1.2, utilize the coding rule of described QR Quick Response Code that described car plate trade mark information ciphertext character string s' is encoded, Obtain deciphering QR code 0-1 row vector D'=[d₁,d₂,…,d_w,…,d_W]；d_wRepresent the w element；W represents described deciphering The sum of element in QR code 0-1 row vector D'；

Step 1.3, according to described deciphering QR code 0-1 row vector D'=[d₁,d₂,…,d_w,…,d_W], it is thus achieved that described S Wolffram 1st deciphering cellular state value of invertible element cellular automaton2nd dimension deciphering born of the same parents' state value $B_2=[d_{\frac{W}{2}+1},d_{\frac{W}{2}+2},...,d_W];$

Step 2, initialization

Utilize rotation function to described encryption evolution rule sequence R_en={ r₁,r₂,…,r_KAnd encryption evolution time Number Sequence I_en={ N₁,N₂,…,N_KBe respectively processed, it is thus achieved that deciphering evolution rule sequence R_de={ r_K,r_K-1,…,r₁And deciphering evolution time Number Sequence I_de={ N_K,N_K-1,…,N₁}；

Step 3, decipher described car plate trade mark information ciphertext character string s'

Step 3.1, definition cyclic variable y；The y time deciphering cellular state value B_yWith the y+1 time deciphering cellular state value B_y+1； 1≤y≤K；And initialize y=1；

Step 3.2, by described the y time deciphering cellular state value B_yWith the y+1 time deciphering cellular state value B_y+1As described S The y time deciphering initial state value of Wolffram invertible element cellular automaton；

Step 3.3, from described deciphering evolution rule sequence R_deIn choose y-th evolution rule r_K+1-yTo described the y time initial shape State value carries out N_K+1-ySecondary evolution, it is thus achieved that the y+2 time deciphering cellular state value B_y+2；

Step 3.4, judge that y+1 is whether beyond threshold k；The most then exit execution, thus obtain invertible element cellular automaton The K+2 time deciphering cellular state value B_K+2；Otherwise, value y+1 is assigned to y, and returns step 3.2 and perform；

Step 3.5, the decoding rule of described QR Quick Response Code is utilized to decipher cellular to the K+2 time of described invertible element cellular automaton State value B_K+2It is decoded, thus obtains described car plate trade mark information character string s.

Compared with the prior art, beneficial effects of the present invention is embodied in:

1, the present invention uses QR Quick Response Code ciphertext graph picture record automotive license plate information so that it is can pass through in intelligent transportation system Position and scan QR Quick Response Code ciphertext graph picture, quick obtaining automotive license plate information, overcome existing Car license recognition accuracy rate low and The existing license plate image inefficient problem of identification intelligent traffic system；Thus it is effectively improved Car license recognition accuracy rate and intelligent transportation The efficiency of system.

2, QR Quick Response Code of the present invention has the feature of reading quick, convenient, can quickly carry out Car license recognition, fall Low to backstage hardware with the high request of processing routine, reduce the intelligent transportation system dependence to high power capacity hardware, thus improve car plate The efficiency identified, reduces the consuming of manual identified.

3, QR Quick Response Code of the present invention has the advantages that fault-tolerant ability is strong, has certain error correction, and decoding is reliable Property high so that in the case of being stained at night or car plate, still can carry out Car license recognition exactly, improve the accurate of Car license recognition Rate, reduces cost of labor；

4, the present invention uses embedding QR Quick Response Code to realize the making of anti-counterfeiting license plate, has low cost, easily makes, durable, Bar code symbol shape, the feature of size variable-scale, such that it is able to reduce car plate cost of manufacture, it is achieved economic benefit.

5, the present invention uses encryption QR Quick Response Code, plays effective antiforge function, overcomes existing car plate and makes simple, it is easy to The shortcoming forged；Ensure that effective management of automotive license plate.

6, the present invention is based on S Wolffram reversible cellular automation method encryption and decryption, and this encryption method random distribution is good, key Space is big, is effective against exhaustive attack and the attack to key, and security is high, adds the difficulty of forgery, serves very well Confidentiality；Additionally this encipher-decipher method has high efficiency, can quick encryption and decryption, it is achieved quickly Car license recognition.

7, the false proof automotive license plate of the band QR Quick Response Code that the present invention provides, its antifalsification is embodied in, and first: on false car plate QR Quick Response Code cannot be deciphered by decryption program, such that it is able to judge that car plate is forged；Second: in the information and date storehouse after deciphering Information is inconsistent, such that it is able to judge that car plate is forged；Three: QR Quick Response Code image encryption in plain text is converted into ciphertext graph picture, simultaneously Use encryption rule sequence and encryption evolutionary series dual key, increase key space, have various, not unique, therefore have Stronger secrecy and antiforge function, and effectively reduce the harmful effect of ghost car plate.

8, the present invention is that intelligent traffic administration system provides car plate QR 2 D code information interface, for research and development associated portable equipment, it is achieved Traffic police is intelligent, unitized, lighting provides possibility, has a extensive future.

Accompanying drawing explanation

Fig. 1 is the automotive license plate front exemplary plot of band of the present invention encryption QR Quick Response Code；

Fig. 2 is that the present invention is based on S Wolffram invertible element cellular automaton QR Quick Response Code encryption principle figure；

Fig. 3 is that the present invention deciphers schematic diagram based on S Wolffram invertible element cellular automaton QR Quick Response Code.

Detailed description of the invention

In the present embodiment, the automotive license plate of a kind of band encryption QR Quick Response Code, refer at the vapour comprising car plate trade mark information character string s Car car plate is embedded with the ciphertext graph picture of encryption QR Quick Response Code.As it is shown in figure 1, in the present embodiment, a kind of band encryption QR bis- The automotive license plate of dimension code includes ciphertext graph picture and car plate trade mark information character string " Anhui A88888 " encrypting QR Quick Response Code；Car Board trade mark information character string " Anhui A88888 " is followed successively by from left to right: " Anhui " is called for short in the Chinese character province representing province, represents provincial Prefecture-level city's capitalization English letter numbering " A ", and five vehicle registrations sequence number " 88888 ".

In being embodied as, as in figure 2 it is shown, the ciphertext graph of encryption QR Quick Response Code seems to generate as follows:

Step 1, initialization

Step 1.1, utilize the coding rule of QR Quick Response Code that car plate trade mark information character string s is encoded, it is thus achieved that encryption is initial QR code 0-1 row vector A₁=[a₁,a₂,…,a_h,…,a_N]；a_hRepresent the h element；N represents encryption initial Q R code 0-1 row Vector A₁The sum of middle element；The coding rule of the QR Quick Response Code employed in the present embodiment can be unified with reference to " ISO/IEC 18004-2006 information technology. automatically identify and data capture technique .QR code 2005 bar code symbologies specification "；This Model2 pattern in the coding rule of bright middle employing QR Quick Response Code, version 7, the mixed characters pattern QR code of Level H are compiled Code mode；Level H has the correction capacity of highest ranking, such that it is able to improve the reading capability in the case of car plate Quick Response Code is stained；

In specific implementation process, car plate trade mark information character string s is possible not only to comprise car plate trade mark information such as " Anhui A88888 ", Multiple identity characteristic character string can also be comprised, such as: issuing date character string, mechanism's character string of awaring a certificate, number plate of vehicle type The character strings such as character string, car owner's identity information, thus form the car plate encrypted characters string with higher antifalsification；This car plate is added Close character string carries out the coding of step 1.1 again, can be effectively improved anti-counterfeiting performance.Encode for convenience, for car plate encrypted word Chinese character information in symbol string can also be carried out with numeral numbering or letter representation.

Step 1.2, utilize formula (1) obtain encryption revise QR code 0-1 row vector A₂:

A₂=randperm (A₁) (1)

In formula (1), randperm (A₁) representing will encryption initial Q R code 0-1 row vector A₁In element random alignment；

Step 1.3, utilize formula (2) obtain S Wolffram invertible element cellular automaton kth evolution rule r_k:

r_k=rand (m, n) (2)

In formula (2), m, n represent positive integer, and have 1≤m≤n≤256；Rand () represents random function；Rand (m, n) table Show from integer range [m, n], randomly choose an integer；In the present embodiment, S Wolffram invertible element cellular automaton used refers to 《CellularAutomata Modeling ofPhysical》；

Step 1.4, repeated execution of steps 1.3, thus obtain the encryption evolution rule sequence that K evolution rule is constituted R_en={ r₁,r₂,…,r_k,…,r_K}；1≤k≤K；Due to the common restriction of encryption times, decryption time and security, for this The QR Quick Response Code coded system of the version 7 in embodiment, in selected encryption rule sequence, to answer K to be more than or equal to 10 little for rule number In equal to 20；

Step 1.5, utilize formula (3) obtain S Wolffram invertible element cellular automaton kth evolution rule r_kEvolution times N_k:

N_k=rand (1, N^*) (3)

In formula (3), N^*Represent a positive integer；Due to the restriction of encryption/decryption speed, in encryption evolutionary series, each rule develops secondary Number should meet more than or equal to 1 less than or equal to 50.Therefore, in the present embodiment, r is selected_k=rand (m, n) raw in closed interval [1,50] Become random integers；

Step 1.6, repeated execution of steps 1.5, thus obtain the encryption evolution time Number Sequence that K evolution number of times is constituted I_en={ N₁,N₂,…,N_k,…,N_K}；

Step 2, encryption car plate trade mark information character string

Step 2.1, definition cyclic variable x, x: th encryption cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1； 1≤x≤K；And initialize x=1；Then x: th encryption cellular state value A_xIt is encryption initial Q R code 0-1 row vector A₁； (x+1)th time encryption cellular state value A_x+1It is encryption and revises QR code 0-1 row vector A₂；

Step 2.2, by described x: th encrypt cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1As S The x: th encryption initial state value of Wolffram invertible element cellular automaton；In S Wolffram invertible element cellular automaton, x: th Encryption cellular state value A_xAs the state value of previous moment, (x+1)th time encryption cellular state value A_x+1Shape as current time State value；And be input simultaneously in S Wolffram invertible element cellular automaton, thus obtain the state value of subsequent time；

Step 2.3, from encryption evolution rule sequence R_enIn choose x-th evolution rule r_xX: th encryption initial state value is entered Row encryption evolution time Number Sequence I_enMiddle N_xSecondary evolution, it is thus achieved that+2 encryption cellular state value A of xth_x+2；

Step 2.4, judge that x+1 is whether beyond threshold k；The most then exit execution, thus obtain the of invertible element cellular automaton K+1 cellular state value A_K+1With the K+2 time cellular state value A_K+2；Otherwise, the value of x+1 is assigned to x；And return step Rapid 2.2 perform；

Step 2.5, by the K+1 time cellular state value A_K+1With the K+2 time cellular state value A_K+2Constitute encryption QR code 0-1 Row vector D=[A_K+2,A_K+1]；Merging order herein must not overturn；

Step 3, generation ciphertext graph picture

Step 3.1 utilizes the decoding rule of QR Quick Response Code encryption QR code 0-1 row vector D to be decoded, it is thus achieved that car plate board Number information ciphertext character string s'；The decoding rule of the QR Quick Response Code employed in the present embodiment can be unified with reference to " ISO/IEC 18004-2006 information technology. automatically identify and data capture technique .QR code 2005 bar code symbologies specification "；Decoding Process is the inverse process of cataloged procedure；

Step 3.2 utilizes QR image in 2 D code maker, and car plate trade mark information ciphertext character string s' generates encryption QR two dimension The ciphertext graph picture of code；The present embodiment can use such as QR image in 2 D code makers such as " Quick Response Code generate great master's software "；

Automotive license plate QR Quick Response Code decrypting process is the inverse process of ciphering process, as it is shown on figure 3, encryption QR Quick Response Code Ciphertext graph seems to read as follows:

Step 1, the ciphertext graph picture of identification encryption QR Quick Response Code

Step 1.1, utilize image in 2 D code scanner scan automotive license plate QR Quick Response Code ciphertext graph picture, it is thus achieved that car plate trade mark information Ciphertext character string s'；The present embodiment can use such as the smart mobile phone of softwares such as " I see " sweep as QR image in 2 D code Retouch device or other have the electronic equipment of two-dimensional code authentication function；

Step 1.2, utilize the coding rule of QR Quick Response Code that car plate trade mark information ciphertext character string s' is encoded, it is thus achieved that to solve Close QR code 0-1 row vector D'=[d₁,d₂,…,d_w,…,d_W]；d_wRepresent the w element；W represents in encryption row vector D' The sum of element；

Step 1.3, according to deciphering QR code 0-1 row vector D'=[d₁,d₂,…,d_w,…,d_W], it is thus achieved that S Wolffram invertible element 1st deciphering cellular state value of cellular automaton2nd dimension deciphering born of the same parents' state value $B_2=[d_{\frac{W}{2}+1},d_{\frac{W}{2}+2},...,d_W];$

Step 2, initialization

Utilize rotation function rot () to encryption evolution rule sequence R_en={ r₁,r₂,…,r_KAnd encryption evolution time Number Sequence I_en={ N₁,N₂,…,N_KBe respectively processed, it is thus achieved that deciphering evolution rule sequence R_de={ r_K,r_K-1,…,r₁And deciphering evolution time Number Sequence I_de={ N_K,N_K-1,…,N₁}；Rotation function rot () in the present embodiment is defined as {r_K,r_K-1,…,r₁}=rot ({ r₁,r₂,…,r_K})；Realize the reversion to the parameter in function body 180 °；

Step 3, deciphering car plate trade mark information ciphertext character string s'

Step 3.1, definition cyclic variable y；The y time cellular state value B_yWith the y+1 time cellular state value B_y+1；1≤y≤K； And initialize y=1；B herein_yAnd B_y+1Order must not overturn, it is ensured that two groups of data tandem of input have to comply with S every time The rule of Wolffram invertible element cellular automaton；

Step 3.2, by the y time deciphering cellular state value B_yWith the y+1 time deciphering cellular state value B_y+1As S Wolffram The y time deciphering initial state value of invertible element cellular automaton；

Step 3.3, from deciphering evolution rule sequence R_deIn choose y-th evolution rule r_K+1-yThe y time initial state value is carried out Deciphering evolution time Number Sequence I_deMiddle N_K+1-ySecondary evolution, it is thus achieved that the y+2 time deciphering cellular state value B_y+2；

Step 3.4, judge that y+1 is whether beyond threshold k；The most then exit execution, thus obtain in decrypting process reversible The K+2 time deciphering cellular state value B of cellular automata_K+2；Otherwise, value y+1 is assigned to y, and returns step 3.2 and perform；

Step 3.5, utilize the K+2 time deciphering to the invertible element cellular automaton in decrypting process of the coding rule of QR Quick Response Code Cellular state value B_K+2It is decoded, thus obtains car plate trade mark information character string s.

Claims (1)

1. an automotive license plate for band encryption QR Quick Response Code, described automotive license plate comprises car plate trade mark information character string s；It is special Levy and be: in described automotive license plate, be embedded with the ciphertext graph picture of encryption QR Quick Response Code；

The ciphertext graph of described encryption QR Quick Response Code seems to generate as follows:

Step 1, initialization

Step 1.1, utilize the coding rule of QR Quick Response Code that described car plate trade mark information character string s is encoded, it is thus achieved that encryption Initial Q R code 0-1 row vector A₁=[a₁,a₂,…,a_h,…,a_N]；a_hRepresent the h element；N represents described encryption initial Q R Code 0-1 row vector A₁The sum of middle element；

Step 1.2, utilize formula (1) obtain encryption revise QR code 0-1 row vector A₂:

A₂=randperm (A₁) (1)

In formula (1), randperm (A₁) represent described encryption initial Q R code 0-1 row vector A₁In element random alignment；

Step 1.3, utilize formula (2) obtain S Wolffram invertible element cellular automaton kth evolution rule r_k:

r_k=rand (m, n) (2)

In formula (2), m, n represent positive integer, and have 1≤m≤n≤256；Rand () represents random function；

Step 1.4, repeated execution of steps 1.3, thus obtain the encryption evolution rule sequence that K evolution rule is constituted R_en={ r₁,r₂,…,r_k,…,r_K}；1≤k≤K；

Step 1.5, formula (3) is utilized to obtain the kth evolution rule r of described S Wolffram invertible element cellular automaton_kEvolution number of times N_k:

N_k=rand (1, N^*) (3)

In formula (3), N^*Represent a positive integer；

Step 1.6, repeated execution of steps 1.5, thus obtain the encryption evolution time Number Sequence that K evolution number of times is constituted I_en={ N₁,N₂,…,N_k,…,N_K}；

Step 2, encrypt described car plate trade mark information character string

Step 2.1, definition cyclic variable x, x: th encryption cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1； 1≤x≤K；And initialize x=1；Then x: th encryption cellular state value A_xIt is described encryption initial Q R code 0-1 row vector A₁； (x+1)th time encryption cellular state value A_x+1It is described encryption and revises QR code 0-1 row vector A₂；

Step 2.2, by described x: th encrypt cellular state value A_xWith (x+1)th time encryption cellular state value A_x+1As described S The x: th encryption initial state value of Wolffram invertible element cellular automaton；

Step 2.3, from described encryption evolution rule sequence R_enIn choose x-th evolution rule r_xInitial to the encryption of described x: th State value carries out N_xSecondary evolution, it is thus achieved that+2 encryption cellular state value A of xth_x+2；

Step 2.4, judge that x+1 is whether beyond threshold k；The most then exit execution, thus obtain the of invertible element cellular automaton K+1 encryption cellular state value A_K+1With the K+2 time encryption cellular state value A_K+2；Otherwise, the value of x+1 is assigned to x； And return step 2.2 and perform；

Step 2.5, by described the K+1 time encryption cellular state value A_K+1With the K+2 time encryption cellular state value A_K+2Constitute Encryption QR code 0-1 row vector D=[A_K+2,A_K+1]；

Step 3, generation ciphertext graph picture

Step 3.1, utilize QR Quick Response Code decoding rule described encryption QR code 0-1 row vector D is decoded, it is thus achieved that Car plate trade mark information ciphertext character string s'；

Step 3.2, utilize QR image in 2 D code maker, described car plate trade mark information ciphertext character string s' is generated described in add The ciphertext graph picture of close QR Quick Response Code.