The invention discloses a technology for applying vocal print 
verification as security codes of mobile applications. The technology comprises the steps as follows: using a 
mobile phone which comprises a vocal print sampling module; conducting vocal print registration for the first time, uploading a registration number and vocal print characters to a vocal print 
verification server through the 
mobile phone, and establishing a vocal print file of a register on the 
server; according to differences of the vocal print 
verification modes, enabling a user to follow to speak a verification 
sentence; sending a 
mobile phone number and verification voice 
stream to the vocal print verification 
server by 
application software through safe 
network connection; comparing vocal print characters of the voice 
stream and the vocal print of the mobile phone number in registration by the vocal print verification server, and returning the similar percentage; and according to self security requirement, allowing the user to use the 
software if the probability exceeds a set threshold value, otherwise, refusing using the 
software and making records into a security log. According to the scheme, the security is guaranteed by utilizing the uniqueness of personal voice and through verification by the vocal print verification server, meanwhile, the 
cracking possibility is reduced at the same time, and the use convenience effect can be achieved.