Brain fingerprinting is a technique that uses electroencephalography (EEG) and the P300 component of event-related potentials to determine if specific information is stored in a person's brain. It works by measuring electrical brain wave responses, particularly the P300 wave, when a person is exposed to crime-related words or images. If the P300 response is detected, it suggests the person has knowledge of the information; if not, the information is likely unknown to them. Law enforcement agencies use brain fingerprinting to help determine if a suspect has knowledge related to a crime.

1. PRESENTED BY
G HARSHA VARDHAN

2. What is “BRAIN FINGERPRINT”?
 Brain fingerprinting is a computer based technology
designed to determine hidden information in
individual’s brain.
 It will analyzed by measuring electrical brain wave
responses to words, phrases or pictures presented on a
computer screen.
 it will be measures by the
chief technique of “EEG & P300”.

3. What is human brain?
 The human brain is the main organ of the human
central nervous system.
 The human cerebral cortex is a thick layer of neural
tissue that covers the two cerebral hemispheres that
make up most of the brain and act for responses.
 The measure of electric activity of brain cortex by
means of electrodes is known as
electroencephalography(EEG).

4. What is P300 ?
 The P300 (P3) wave is an event related potential (ERP)
component elicited in the process of decision making.
 It is usually elicited using the “oddball paradigm”.
 It consists of mainly two subcomponents “p3a &p3b”.
 The P3a has been associated with brain activity
related to the engagement of attention.
 The P3b has been a prominent tool used to study
cognitive processes, especially psychology research
on information processing.

5. Brain fingerprint technique?
 Firstly the p300 was been placed on the forehead for to
notify the response of brain.
 Each response will denotes a specific colour
 RED: information is known by the suspect.
 GREEN: information is not known by suspect.
 BLUE: Information of the crime that only perpetrator
would know.

6. Brain fingerprint technique?
 As we observed the monitoring
 Red is not resemble with the
Blue matter so info not obtained
• Red response is P300 so to
Initialise the reference information
• When second response, blue interact with green one
so that the initial response is recorded

7. Brain fingerprint technique?
 Number of trails has been recorded are min 60
 These trails gives an extreme response about the info
present on the brain.

8. How it works?
The Main Modules Of Testing Brain Fingerprint is:
• Recording of electrical brain activity
• Mathematical data analysis algorithm that compares the
responses of the 3 Functions
• Presentation of the Response
• Determination of information present or information
absent

9. How it works?
 Firstly the info related to crime or incident is
preloaded into p300.
 These sensor(p300) assumption
is taken along with brain wave ,
eye response and along with
sensor reading of test person.

10. How it works?
 The wave responses are generated as shown in figure
 The first response shown that the person is not related
to crime.
 The second response
shows the person
is related to crime.

11. How it works?
As We observe the first response, the
blue ray is not been linked with red
(p300) response, so the crime was
not commited by the person
The above response spences that the
red mermer response is linked with
the blue wave so that the crime was
committed by the person

12. How it works?
 The total trails was taken into consideration and make
a step boot up analysis

13. Brain Fingerprint (vs) Lie detector
For analysing the lie detector , it responses depends on heartbeat,
pulse etc.
But as in brain fingerprinting, only the brain responses is analysed

14. Present using fields!!
 Brain fingerprint is mainly used in the federal bureau
of investigation(FBI).
 Central bureau of investigation(CBI) For Suspect
Analysis.
 This technique mainly used to
Suspect the person if clues
Resolving is negligible.

15. Limitations
 Brain fingerprint is initialise what info stores in the brain, it doesn’t
initialise how the info was stored in brain.
 It resembles the brain response, there is no right to judge the criminal ,
it only finalise by the honorable justice.