Aspects of the disclosure relate to identification of confidential data, in a message, and encryption of the confidential data. A computing platform may determine, based on a knowledge base, confidential data in a first message transmitted over one or more computing networks. The computing platform may encrypt the confidential data in the message. The computing platform may generate a second message based on encrypted confidential data. Further, the computing platform may update a header, corresponding to the second message, to indicate an encryption technique used for the encrypted confidential data. The computing platform may further encrypt the header of the second message, and transmit the second message.