TWI550427B - A single - channel brainwave signal empirical modal disassembly / chaotic visual reinforcement method - Google Patents

Description

A single channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method

The invention relates to a single channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method, which is mainly a chaotic vision strong encryption method designed for encrypting a single channel brain wave biomedical signal, and integrates an adaptive experience. Modal disassembly mechanism, integrating a single-channel brain wave biomedical signal Hilbert Huang essential modal function energy distribution characteristic parameter is the first chaotic map first chaotic encryption parameter and the second chaotic map first chaotic encryption parameter, a kind The two-dimensional chaotic encryption mechanism and a two-dimensional block spacing mechanism are used to enhance the visual encryption effect of the single-channel brain wave biomedical signal to achieve the indistinguishability of the signal, increasing the encryption strength and the more difficult to crack.

According to the two-dimensional chaotic multi-channel brain wave visual encryption mechanism, an advanced multi-channel brain wave biomedical signal fast encryption mechanism, as described in Journal of Marine Science and Technology , 19(6): 666-672, 2011 international journal paper, For example: Simultaneously encrypt FP1, FP2..., P7 multiple channel brainwave medical signals to achieve fast visual encryption.

According to the chaotic electrocardiogram/brain wave map, the visual encryption mechanism is an advanced biomedical signal encryption mechanism. As explained in the I338845 patent, the integrated chaotic sequence has superior unpredictability, and the integrated one-dimensional chaotic code is used to map the values. And reshuffle to achieve the visual encryption effect of ECG/Brain Biomedical Signal.

In addition, the empirical mode disassembly mechanism is the core technology of Hilbert's yellow conversion method, which was proposed by Academician Huang Wei and applied to the field of signal analysis. The two-dimensional block spacing mechanism is a relatively easy to implement and low-cost method for reducing the association between encrypted single-channel brainwave signals and original single-channel brainwave signals.

However, in order to strengthen the encryption and toughness, design thinking, integrate innovation, integrate an empirical mode disassembly mechanism, innovative application to the field of chaotic vision tough encryption, and innovate a single-channel brain wave biomedical signal Hilbert Huang essence mode The characteristic energy distribution characteristic parameters are the first chaotic encryption parameter of the first chaotic map, the first chaotic encryption parameter of the second chaotic map, a two-dimensional chaotic encryption mechanism and a two-dimensional block spacing mechanism to innovate and strengthen the single-channel brain wave map. The visual strong encryption effect is more difficult to be cracked, and it can obtain superior and strong encryption effect in the field of visual encryption of bio-signal signals such as single-channel brain waves.

The invention designs a single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method, which is applied to visual strong encryption of single-channel brain wave biomedical signal, and innovatively integrates an empirical mode disassembly mechanism. Applied to a more robust, less susceptible to cracking, single-channel brainwave chaotic vision tough encryption field, the input of a single channel brain wave is disassembled into N single-channel brain wave intrinsic mode function signals and a single channel brain wave residual Function signal; applying a two-dimensional chaotic matrix generation mechanism, encrypting N single-channel brain wave intrinsic mode function signals and a single-channel brain wave residual function signal, and outputting N chaotic encrypted single-channel brain wave intrinsic mode function signals and one Chaotic encryption single channel brain wave residual function signal; N chaotic encryption single channel brain wave essential modal function signal and a chaotic encryption single channel brain wave residual function signal input a two-dimensional block spacing mechanism, output N interval chaotic encryption single channel Brain wave intrinsic mode function signal and a spacing chaotic encryption single channel brain wave residual function signal, wherein the second chaotic map first chaotic encryption parameter and the first The first chaotic encryption parameter of the chaotic map is the input single-channel brain wave biomedical signal Hilbert Huang essential modal function energy distribution characteristic parameter, the second chaotic map first chaotic encryption parameter is a single channel brain wave intrinsic modal function The signal energy refers to the minimum total energy ratio. The first chaotic encryption parameter of the first chaotic map is a single channel brain wave intrinsic mode function signal energy reference total energy ratio maximum value, and its strong encryption and more difficult to crack effect is quite superior.

The encrypted single-channel brain wave biomedical signals are severely distorted and deformed, and the related medical interpretation cannot be performed. The encryption effect is good, and the flexibility of the visual encryption method can be increased to achieve the purpose of visual strong encryption. When the correct encryption parameters are entered, the single-channel brainwave medical signal can be correctly replied.

01‧‧‧Single channel brain wave biomedical signal

02‧‧‧Experimental mode dismantling mechanism

03‧‧‧ Single channel brain wave first essential modal function signal

04‧‧‧ Single channel brain wave second essential modal function signal

05‧‧‧Single channel brain wave Nth modal function signal

06‧‧‧ Single channel brain wave residual function signal

07‧‧‧First multiplication mechanism

08‧‧‧Second multiplication mechanism

09‧‧‧ the N multiplication mechanism

10‧‧‧N +1 multiplication mechanism

11‧‧‧Two-dimensional chaotic matrix generation mechanism

12‧‧‧First chaotic encryption sequence

13‧‧‧Second chaotic encryption sequence

14‧‧‧ chaotic encryption sequence of N

15‧‧‧N +1 chaotic encryption sequence

16‧‧‧ Single channel brain wave first chaotic encryption essential modal function signal

17‧‧‧ Single channel brainwave second chaotic encryption essential modal function signal

18‧‧‧Single-channel brainwave N- chaotic encryption essential modal function signal

19‧‧‧Single channel brainwave chaotic encryption residual function signal

20‧‧‧Two-dimensional block spacing mechanism

21‧‧‧ Single channel brainwave first interval chaotic encryption essential modal function signal

22‧‧‧ Single channel brainwave second interval chaotic encryption essential modal function signal

23‧‧‧Single-channel brainwave N- space chaotic encryption essential modal function signal

24‧‧‧ Single channel brainwave interval chaotic encryption residual function signal

25‧‧‧Accumulation mechanism

26‧‧‧Experience mode disassembly/chaos single channel brain wave visual encryption biomedical signal

27‧‧‧First chaotic map

28‧‧‧First Chaotic Map First Chaotic Encryption Parameters

29‧‧‧Second chaotic encryption parameters of the first chaotic map

30‧‧‧Enter single channel brainwave biomedical signal length

31‧‧‧The first chaotic map third chaotic encryption parameter

32‧‧‧The first chaotic map fourth chaotic encryption parameter

33‧‧‧Second chaotic map

34‧‧‧Second chaotic encryption parameters of the second chaotic map

35‧‧‧Second chaotic encryption parameter of second chaotic map

36‧‧‧The second chaotic map third chaotic encryption parameter

37‧‧‧Second chaotic map fourth chaotic encryption parameter

38‧‧‧The second chaotic map fifth chaotic encryption parameter

39‧‧‧Enter the number of essential modal functions of single-channel brain wave biomedical signals

40‧‧‧ x- vector one-dimensional chaotic encryption sequence

41‧‧‧ y vector one-dimensional chaotic encryption sequence

42‧‧‧N +2 multiplication mechanism

43‧‧‧N +3 multiplication mechanism

44‧‧‧2N +2 multiplication mechanism

The first picture: a single-channel brain wave signal empirical mode disassembly / chaotic vision tough encryption method architecture diagram.

The second picture: a two-dimensional chaotic matrix generation mechanism.

The third picture: the empirical mode disassembly/chaotic visual encryption single channel brainwave signal without two-dimensional block spacing mechanism.

The fourth picture: empirical mode disassembly / chaotic visual encryption single channel brain wave signal.

Figure 5: Correct decryption of empirical modal disassembly/chaotic visual encryption of single-channel brainwave signals.

Figure 6: Single-channel brain wave first essential modal function signal.

Figure 7: Single-channel brainwave first interval chaotic encryption essential modal function signal.

Figure 8: The first chaotic encryption parameter and the second chaotic map of the first chaotic map when inputting the decryption parameters The first chaotic encryption parameters have 0.01% error, and the single channel brain wave signal is decrypted by mistake.

With regard to the implementation, technical means and efficacy of the present invention, the following diagrams are exemplified as follows: a single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method, including: Step 1: A single channel brain wave Biomedical signal (01), applying an empirical mode disassembly mechanism (02), outputting a single channel brain wave first essential mode function signal (03), a single channel brain wave second essential mode function signal (04) ), ..., a single channel brain wave Nth essential modal function signal (05) and a single channel brain wave residual function signal (06); Step 2: a two-dimensional chaotic matrix generation mechanism (11), input a a chaotic map (27), a first chaotic map first chaotic encryption parameter (28), a first chaotic map second chaotic encryption parameter (29), a first chaotic map third chaotic encryption parameter (31), a The first chaotic map fourth chaotic encryption parameter (32) and an input single channel brain wave biomedical signal length parameter (30), input a second chaotic map (33), a second chaotic map first chaotic encryption parameter (34) ), a second chaotic map, second chaotic encryption parameter (35), a second chaos The third chaotic encryption parameter (36), the second chaotic map fourth chaotic encryption parameter (37) and the second chaotic map fifth chaotic encryption parameter (38) generate a first chaotic encryption sequence (12), a a second chaotic encryption sequence (13), ..., an N- th chaotic encryption sequence (14) and an N+1 chaotic encryption sequence (15); Step 3: the single-channel brain wave first essential mode function signal (03 And the first chaotic encryption sequence (12) inputs a first multiplication mechanism (07), outputs a single-channel brain wave first chaotic encryption essential modal function signal (16), and the single-channel brain wave second essential mode The function signal (04) and the second chaotic encryption sequence (13) are input to a second multiplication mechanism (08), and output a single channel brain wave second chaotic encryption essential modal function signal (17), ..., the single channel brain The Boddy N essential modal function signal (05) and the Nth chaotic encryption sequence (14) are input to an Nth multiplication mechanism (09), and output a single channel brainwave Nth chaotic encryption essential modal function signal (18), the single-channel signal electroencephalogram residue function (06) and the first N + 1 chaotic encryption sequence (15) a N + 1-input multiplier mechanism (15), the output of a single-pass Brain wave chaotic encryption residual function signal (19); Step 4: the single channel brain wave first chaotic encryption essential modal function signal (16), the single channel brain wave second chaotic encryption essential modal function signal (17), ..., the single-channel brain wave N- chassis encryption essential mode function signal (18) and the chaotic encryption single-channel brain wave residual function signal (19), input a two-dimensional block spacing mechanism (20), output a single channel brain Wave first interval chaotic encryption essential modal function signal (21), a single channel brain wave second interval chaotic encryption essential modal function signal (22), ..., a single channel brain wave Nth interval chaotic encryption essential modal function Signal (23) and a single channel brainwave interval chaotic encryption residual function signal (24); step 5: the single channel brain wave first interval chaotic encryption essential mode function signal (21), the single channel brain wave second interval Chaotic encryption essential modal function signal (22), ..., the single channel brain wave Nth chaotic encryption essential modal function signal (23) and the single channel brain wave interval chaotic encryption residual function signal (24), input a cumulative Mechanism (25), output an empirical mode disassembly / Single Channel chaotic electroencephalogram robust encryption biomedical visual signal (26).

The single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method according to the present invention, the two-dimensional chaotic matrix generation mechanism comprises: Step 1: input a first chaotic map (27), a first chaotic map First chaotic encryption parameter (28), first chaotic map second chaotic encryption parameter (29), first chaotic map third chaotic encryption parameter (31), first chaotic map fourth chaotic encryption parameter (32) And an input single channel brain wave biomedical signal length parameter (30), output an x vector one-dimensional chaotic encryption sequence (40); step two: input a second chaotic map (33), a second chaotic map first chaos Encryption parameter (34), a second chaotic map second chaotic encryption parameter (35), a second chaotic map third chaotic encryption parameter (36), a second chaotic map fourth chaotic encryption parameter (37), a first The second chaotic map fifth chaotic encryption parameter (38) and an input single channel brain wave biomedical signal intrinsic modal function number parameter (39), output a y vector one-dimensional chaotic encryption sequence (41); step three: the y The vector one-dimensional chaotic encryption sequence contains twice the fifth chaotic encryption parameter The address chaotic encryption sequence value, CE _y ( m ), and the x vector one-dimensional chaotic encryption sequence (40) are input to an N+2 multiplication mechanism (42), and the first chaotic encryption sequence is output (12); step four The y vector one-dimensional chaotic encryption sequence contains twice the chaotic encryption sequence value of the fifth chaotic encryption parameter address, CE _y (2 m ), and the x- vector one-dimensional chaotic encryption sequence (40) inputs an N+ 3 multiplication mechanism (43), outputting the second chaotic encryption sequence (13), ..., the y vector one-dimensional chaotic encryption sequence contains N + 1 times the fifth chaotic encryption parameter address chaotic encryption sequence value, CE _y ( m ×(N+1)), and the x- vector one-dimensional chaotic encryption sequence (40) inputs a 2N+2 multiplication mechanism (44), and outputs the ( N+1) chaotic encryption sequence (15).

The single channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method, the first chaotic map first chaotic encryption parameter (28) and the second chaotic map first chaotic encryption parameter (34) For the single channel brain wave biomedical signal (01) Hilbert Huang essential modal function energy distribution characteristic parameter, the first chaotic map first chaotic encryption parameter (28) is an essential modal function brain wave biomedicine The signal energy refers to the maximum total energy ratio, and the first chaotic encryption parameter (34) of the second chaotic map is a single channel brain wave intrinsic mode function signal energy reference total energy ratio minimum value.

The single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method according to the present invention, the encryption algorithm and the encryption parameter embodiment are defined as follows:

Step 1: A length of L _eeg (30) input single-channel brain wave biomedical signal (01), eeg , using empirical modal disassembly method to disassemble into a single-channel brain wave first essential modal function signal (03), IMF ₁ , single channel brainwave second essential mode function signal (04), IMF ₂ ,..., single channel brain wave Nth essential mode function signal (05), IMF _N , and single channel brain wave residual function signal ( 06), rf .

Step 2: Analyze the energy distribution characteristic parameter of the single channel brain wave biomedical signal Hilbert Huang essential mode function, the first chaotic map first chaotic encryption parameter (28) and the second chaotic map first chaotic encryption parameter ( 34) for the single channel brain wave biomedical signal (01) Hilbert Huang essential mode function energy distribution characteristic parameter, the first chaotic map first chaotic encryption parameter (28), SP _x , is an essential mode The maximum energy ratio of the brain energy of the brain wave is calculated, and the first chaotic encryption parameter (34), SP _{y of} the second chaotic map is an essential mode function brain wave biomedical signal energy reference total energy ratio minimum value, The description is defined as follows:

Step 3: Set the generation length to L _eeg (30), x vector one-dimensional chaotic encryption sequence (40), CE _x , the first chaotic map (27), CMT _x ;

x ₀ = SP _X , the first chaotic map first chaotic encryption parameter (28)

r _x , the second chaotic encryption parameter of the first chaotic map (29)

n _x , the third chaotic encryption parameter of the first chaotic map (31)

δ _x , the third chaotic encryption parameter of the first chaotic map (32)

Step 4: Generate a one-dimensional chaotic encryption sequence of length n _x (31), CE _x , x vector (40)

x _{n +1} = CMT _X ( x _n ); x ₀ = SP _X ; n ={1,2,..., n _X } (3)

Step 5: Delete the previous n _x chaotic sequence

Step 6: Generate CE _x

Step 7: If x _n > δ _X , delete x _n and go to step six

Otherwise to step eight

Step 8: If k = n _X + L _eeg ,

CE _x , x vector one-dimensional chaotic encryption sequence (40)

Step 9: Repeat steps 3 to 8 to generate a one-dimensional chaotic encryption sequence (41) of length m ×( N +1), CE _y , y vector, where CMT _y : second chaotic map (33)

SP _y : the first chaotic encryption parameter of the second chaotic map (34)

r _y : second chaotic map second chaotic encryption parameter (35)

n _y : third chaotic map third chaotic encryption parameter (36)

δ _y : the fourth chaotic encryption parameter of the second chaotic map (37)

m : fifth chaotic encryption parameter of the second chaotic map (38)

Step 10: Generate a two-dimensional encrypted chaotic sequence CEXY

Where CE _{xy 1} : first chaotic encryption sequence (12)

CE _{xy 2} : second chaotic encryption sequence (13)

CE _xyN : Nth chaotic encryption sequence (14)

CE _{xyN +1} : N + 1 chaotic encryption sequence (15)

Step 11: Enter the single-channel brainwave biomedical signal as defined below:

Step 11: Single channel brain wave first chaotic encryption essential modal function signal (16), IMF ₁ × CE _{xy 11} , single channel brain wave second chaotic encryption essential modal function signal (17), IMF ₂ × CE _{xy 12} ,..., single-channel brainwave N- chaotic encryption essential modal function signal (18), IMF _N × CE _{xy 1 N} and single-channel brainwave chaotic encryption residual function signal (19), rf × CE _{xy 1 N +1} , defined as follows: CEEG = eeg × CE _{xy 1} (8)

Step 12: Single channel brain wave first chaotic encryption essential modal function signal (16), IMF ₁ × CE _{xy 11} , single channel brain wave second chaotic encryption essential modal function signal (17), IMF ₂ × CE _{xy 12} ,..., single-channel brainwave N- chaotic encryption essential modal function signal (18), IMF _N × CE _{xy 1 N} and single-channel brainwave chaotic encryption residual function signal (19), rf × CE _{xy 1 N +1} Input two-dimensional block spacing mechanism (20), output single-channel brain wave first interval chaotic encryption essential modal function signal (21), ICEEG ₁ , single-channel brain wave second interval chaotic encryption essential modal function signal (22) , ICEEG ₂ , ..., single-channel brainwave N- space chaotic encryption essential modal function signal (23), ICEEG _N and single-channel brainwave interval chaotic encryption residual function signal (24), ICEEG _{N +1} .

Step 13: Single channel brain wave first interval chaotic encryption essential modal function signal (21), ICEEG ₁ , single channel brain wave second interval chaotic encryption essential modal function signal (22), ICEEG ₂ , ..., single channel Brainwave N- space chaotic encryption essential modal function signal (23), ICEEG _N and single-channel brainwave interval chaotic encryption residual function signal (24), ICEEG _{N +1} input accumulation mechanism (25), output empirical mode disassembly /Chaotic single-channel brainwave visual encryption biomedical signal, eeeg , described as follows:

The first figure shown in the present invention is a structural diagram of a single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method, and the second figure is an N+1 chaotic encryption proposed by the present invention. The sequence generation method architecture diagram, the embodiment is described as follows, the input single channel brain wave biomedical signal application empirical mode disassembly method is disassembled into a single channel brain wave first essential mode function signal, single channel brain wave second essence mode State function signal, ..., single channel brain wave Nth essential mode function signal and single channel brain wave residual function signal. An example of the encryption parameters is as follows: L _eeg =256 CMT _X ; x _{n +1} = r _x x _n (1- x _n ) r _x =4 x ₀ = SP _C =0.4699 n _x =200 δ _x =0.6 CMT _y ; y _{n +1} = r _y y _n (1- y _n ) r _y =4 y ₀ = SP _y =0.0007 n _y =200 δ _y =0.4 m =64 N =7 (11)

The third picture shows the empirical mode detachment/chaotic visual encryption single channel brain wave signal without two-dimensional block spacing mechanism, and the fourth picture shows the empirical mode disassembly/chaotic visual encryption single channel brain wave signal, encrypted single channel The brainwave biomedical signals are severely distorted and deformed, and the relevant medical interpretations cannot be performed. The encryption effect is quite good. The Pearson correlation coefficient between the encrypted single-channel brainwave signal and the original single-channel brainwave signal is -0.0014, and the original single-channel brain wave. Signal correlation is extremely low. The Pearson correlation coefficient is defined as follows:

s is the original single-channel brain wave signal, u is the empirical mode disassembly/chaotic single-channel brain wave visual toughness encryption biomedical signal (26), and N is the original single-channel brain wave signal length.

The fifth picture is to correctly decrypt the single-channel brain wave empirical mode disassembly/chaotic vision toughened encrypted brain wave signal, and the average mean square error of the original single-channel brain wave signal is 1.9269×10 ^-29 ; the average mean square error is defined as follows:

s is the original single-channel brain wave signal, u is the single-channel brain wave empirical mode disassembly/chaotic brain wave visual toughness encryption correctly decrypts the biomedical signal, and N is the original single-channel brain wave signal length.

The sixth picture shows the first essential mode function signal of the single channel brain wave; the seventh picture shows the first interval brain wave first interval chaotic encryption essential mode function signal, and the visual encryption effect is superior. The eighth figure shows that the first chaotic decryption parameter of the first chaotic map and the first chaotic decryption parameter of the second chaotic map have 0.01% error, and the single channel brain wave signal is decrypted by mistake; the single channel brain wave signal is decrypted by mistake and the original single channel is decoded. The Pearson correlation coefficient of the brain wave signal is 0.0167, which is extremely low in correlation with the original single-channel brain wave signal. Overall, the present invention has practical application value, is more tough, and is less susceptible to being cracked. For an excellent invention, a patent application is filed according to law.

01‧‧‧Single channel brain wave biomedical signal

02‧‧‧Experimental mode dismantling mechanism

03‧‧‧ Single channel brain wave first essential modal function signal

04‧‧‧ Single channel brain wave second essential modal function signal

05‧‧‧Single channel brain wave Nth modal function signal

06‧‧‧ Single channel brain wave residual function signal

07‧‧‧First multiplication mechanism

08‧‧‧Second multiplication mechanism

09‧‧‧ the N multiplication mechanism

10‧‧‧N +1 multiplication mechanism

11‧‧‧Two-dimensional chaotic matrix generation mechanism

12‧‧‧First chaotic encryption sequence

13‧‧‧Second chaotic encryption sequence

14‧‧‧ chaotic encryption sequence of N

15‧‧‧N +1 chaotic encryption sequence

16‧‧‧ Single channel brain wave first chaotic encryption essential modal function signal

17‧‧‧ Single channel brainwave second chaotic encryption essential modal function signal

18‧‧‧Single-channel brainwave N- chaotic encryption essential modal function signal

19‧‧‧Single channel brainwave chaotic encryption residual function signal

20‧‧‧Two-dimensional block spacing mechanism

21‧‧‧ Single channel brainwave first interval chaotic encryption essential modal function signal

22‧‧‧ Single channel brainwave second interval chaotic encryption essential modal function signal

23‧‧‧Single-channel brainwave N- space chaotic encryption essential modal function signal

24‧‧‧ Single channel brainwave interval chaotic encryption residual function signal

25‧‧‧Accumulation mechanism

26‧‧‧Experience mode disassembly/chaos single channel brain wave visual encryption biomedical signal

27‧‧‧First chaotic map

28‧‧‧First Chaotic Map First Chaotic Encryption Parameters

29‧‧‧Second chaotic encryption parameters of the first chaotic map

30‧‧‧Enter single channel brainwave biomedical signal length

31‧‧‧The first chaotic map third chaotic encryption parameter

32‧‧‧The first chaotic map fourth chaotic encryption parameter

33‧‧‧Second chaotic map

34‧‧‧Second chaotic encryption parameters of the second chaotic map

35‧‧‧Second chaotic encryption parameter of second chaotic map

36‧‧‧The second chaotic map third chaotic encryption parameter

37‧‧‧Second chaotic map fourth chaotic encryption parameter

38‧‧‧The second chaotic map fifth chaotic encryption parameter

39‧‧‧Enter the number of essential modal functions of single-channel brain wave biomedical signals

40‧‧‧ x- vector one-dimensional chaotic encryption sequence

41‧‧‧ y vector one-dimensional chaotic encryption sequence

42‧‧‧N +2 multiplication mechanism

43‧‧‧N +3 multiplication mechanism

44‧‧‧2N +2 multiplication mechanism

Claims (2)

A single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method includes: step one: a single channel brain wave biomedical signal, input an empirical mode disassembly mechanism, and output a single channel brain wave first Essential mode function signal, a single channel brain wave second essential mode function signal, ..., a single channel brain wave Nth essential mode function signal and a single channel brain wave residual function signal; Step 2: a 2D Chaotic matrix generation mechanism, input a first chaotic map, a first chaotic map first chaotic encryption parameter, a first chaotic map second chaotic encryption parameter, a first chaotic map third chaotic encryption parameter, a first chaotic map The fourth chaotic encryption parameter and an input single channel brain wave biomedical signal length parameter, input a second chaotic map, a second chaotic map first chaotic encryption parameter, a second chaotic map second chaotic encryption parameter, a second A chaotic map third chaotic encryption parameter, a second chaotic map fourth chaotic encryption parameter and a second chaotic map fifth chaotic encryption parameter, generating a first chaotic encryption sequence A second chaotic encryption sequence, ..., N of a chaotic encryption sequence and a second sequence of N + 1 chaotic encryption; Step three: the first single-channel EEG electroencephalogram nature of the mode function and the first biomedical signal Chaotic Encryption Sequence inputting a first multiplication mechanism, outputting a single channel brain wave first chaotic encryption essential mode function signal, the single channel brain wave second essential mode function signal, and the second chaotic encryption sequence inputting a second multiplication mechanism, Outputting a single-channel brainwave second chaotic encryption essential modal function signal, ..., the single-channel brain wave N- th essential mode function signal and the N- th chaotic encryption sequence input an N- th multiplication mechanism, outputting a single-channel brain wave The Nth chaotic encryption essential modal function signal, the single channel brain wave residual function signal and the N+1 chaotic encryption sequence input an N+1 multiplication mechanism, and output a single channel brainwave chaotic encryption residual function signal; step four The single-channel brain wave first chaotic encryption essential modal function signal, the single-channel brain wave second chaotic encryption essential modal function signal, ..., the single-channel brain wave N- chaotic encryption essential modal function signal No. and single-channel brainwave chaotic encryption residual function signal, input a two-dimensional block spacing mechanism, output a single-channel brain wave first interval chaotic encryption essential modal function signal, a single-channel brain wave second interval chaotic encryption essential mode Function signal, ..., a single channel brain wave Nth interval chaotic encryption essential modal function signal and a single channel brain wave interval chaotic encryption residual function signal; Step 5: the single channel brain wave first interval chaotic encryption essential modal function Signal, the single-channel brain wave second interval chaotic encryption essential modal function signal, ..., the single-channel brain wave N- th chaotic encryption essential modal function signal and the single-channel brain wave interval chaotic encryption residual function signal, input one The accumulation mechanism outputs an empirical mode disassembly/chaotic visual encryption single channel brain wave biomedical signal. For example, a single-channel brain wave signal empirical mode disassembly/chaotic vision strong encryption method according to the first application of the patent scope, wherein the first chaotic map first chaotic encryption parameter is a single channel brain wave intrinsic mode function The signal energy refers to the maximum total energy ratio, and the first chaotic encryption parameter of the second chaotic map is a single channel brain wave intrinsic mode function signal energy reference total energy ratio minimum value.