Patent ID: 9497023
Filing Date: 2016-11-15
CPC Classification: H04L

Claim Text:
1. A computer implemented method for message filtering by a service provider, comprising: receiving an encrypted electronic message and a first decryption key of a public-private key group, the first decryption key operable to decrypt a set of properties associated with the encrypted electronic message without decrypting the entire encrypted electronic message, wherein the encrypted electronic message and the set of properties are encrypted using an encryption key of the public-private key group and wherein the public-private key group includes a second decryption key operable to decrypt the entire encrypted electronic message, and wherein the set of properties is accessible in a partially-obscured form of the encrypted electronic message; decrypting the set of properties for the encrypted electronic message using the first decryption key without decrypting the entire encrypted electronic message; using the decrypted set of properties to determine characteristics of the electronic message, and based at least in part on the determined characteristics, determining a filter result for the encrypted electronic message; and sending the encrypted electronic message and the filter result.