09-07-2012, 11:09 AM
FORGERY & FRAUD DETECTION USING BIOMETRICS
[attachment=27223]
What is Biometrics ?
“Biometric” is a unique, measurable characteristic or trait of a human being for automatically recognizing or verifying identity .
How it works
All biometric systems operate in a
similar fashion by using the four-stages.
Capture
Extraction
Comparison
Match/Non-Match
Signature Verification Algorithm
1.Perform a strong verification that p is a prime number.
2. Perform a strong verification that q is a prime number.
3. Verify that q is a factor of p-1, if any of the above checks fail then the signature cannot be verified and must be considered a failure.
4. Verify that r and s are in the range [1, q-1].
5. Compute w = (s^-1) mod q.
6. Compute u1 = m*w mod q.
7. Compute u2 = r*w mod q.
8. Compute v = ((g^u1 * y^u2) mod p) mod q.
9. Compare v and r, if they are the same then the signature verified correctly.
[attachment=27223]
What is Biometrics ?
“Biometric” is a unique, measurable characteristic or trait of a human being for automatically recognizing or verifying identity .
How it works
All biometric systems operate in a
similar fashion by using the four-stages.
Capture
Extraction
Comparison
Match/Non-Match
Signature Verification Algorithm
1.Perform a strong verification that p is a prime number.
2. Perform a strong verification that q is a prime number.
3. Verify that q is a factor of p-1, if any of the above checks fail then the signature cannot be verified and must be considered a failure.
4. Verify that r and s are in the range [1, q-1].
5. Compute w = (s^-1) mod q.
6. Compute u1 = m*w mod q.
7. Compute u2 = r*w mod q.
8. Compute v = ((g^u1 * y^u2) mod p) mod q.
9. Compare v and r, if they are the same then the signature verified correctly.