Patent ID: 9363667
Filing Date: 2016-06-07
CPC Classification: H04L,H04M,H04W

Claim Text:
1. A method, comprising: receiving monitored voice calls conducted in a communication network; selecting a partial subset of the monitored voice calls that are suspected of having been conducted by a predefined target individual, encrypting the selected partial subset with an encryption key that is associated with the target individual, and retaining only the encrypted partial subset of the voice calls, wherein selecting the partial subset comprises choosing calls whose speech content matches a digital voice signature of the target individual; upon showing that the voice calls in the partial subset were conducted by the target individual with a confidence level greater than a threshold, receiving a decryption key that is associated with the target individual, wherein showing that the voice calls in the partial subset were conducted by the target individual comprises jointly processing multiple suspected voice calls such that the confidence level exceeds the threshold; and decrypting the encrypted partial subset of the voice calls using the decryption key, and providing the decrypted voice calls for analysis.