9. A computer system for performing automated access control using speaker recognition performed via an automated user-machine interaction, the computer system comprising: a processor; and a memory with computer code instructions stored thereon, the processor and the memory, with the computer code instructions being configured to execute an automated user-machine interaction application and cause the system to: in response to a user's contacting a computing system, prompt the user, via an automated user-machine interaction application, to speak a single phrase including a personal identifier and a common phrase component, the personal identifier and common phrase component being distinct, and the common phrase component being the same amongst a plurality of users; decompose a received spoken phrase, the received spoken phrase being the single phrase, and the decomposing including locating the personal identifier within the spoken phrase and locating the common phrase component within the spoken phrase; identify the user based on results of the decomposing, the identifying comprising comparing the personal identifier located against previously stored identifying information; verify the user based on results of the decomposing, the verifying comprising comparing the common phrase component located against one or more previously stored voice prints associated with at least a subgroup of all users; and provide the user, if identified and verified, with access to the computing system.
11. The computer system of claim 9 wherein the common phrase component of the spoken phrase comprises two or more sub-phrases and wherein, in the verifying, the processor and the memory, with the computer code instructions, are further configured to cause the system to: calculate a respective score for each sub-phrase of the common phrase component, the respective scores indicating a level of correspondence between the two or more sub-phrases and the one or more stored voice prints; and verify the user using the respective scores.