Methods, systems, and apparatus, including computer programs encoded on computer storage media, for securing data. One of the methods includes receiving, by a computer system, a network packet for analysis. The method includes determining, by the computer system, to examine the network packet for private data. The method includes identifying, by the computer system, private data in payload of the packet. The method includes encrypting the private data. The method includes storing the encrypted private data in a location separate from the payload. The method also includes obfuscating the private data by adding a reference to the location of the encrypted private data in the payload.