Bank of America Corporation
Steganography mail block server implementation

Abstract:

Aspects described herein relate to a computer system preventing embedded data from being surreptitiously transmitted in attached image files of e-mail messages, where the embedded data is inserted using steganography. The computer system may include a Simple Mail Transfer Protocol (SMTP) e-mail server that transforms an attached image file and replaces the original attached image file with the transformed image file. If the attached image file comprises a stego-image file (where data is embedded in the image), a recipient of the e-mail is unable to extract the embedded data because the recipient does not know a centrally managed key. In addition, the computer system may store images that a user sends as attached files in e-mail messages over a predetermined time duration. If the user sends an e-mail message having an attached image that matches previously sent stored images, an alarm may be generated indicating a potential steganography e-mail event.