Mobile transaction methods and devices with three-dimensional colorgram tokens

A transaction security system includes:

• a processor for pushing an encrypted colorgram with persona descriptors used to build a composite rendering that resembles a first user from a transaction server to a first personal trusted device;
• a processor for decrypting said encrypted colorgram and displaying it on the first personal trusted device;
• a processor for capturing an image of said colorgram displayed by the first personal trusted device by a second personal trusted device;
• a processor for encryption of the image captured from the second personal trusted device and uploading it back to the transaction server;
• a processor for decoding, interpreting, and using the persona descriptors to build and display on the second personal trusted device a composite rendering that should resemble the first user if authentic;
• and
• a processor for allowing the second user to indicate to the transaction server that they recognize the composite rendering as a reasonable impression of the first user;
• wherein, an associated transaction between independent users respectively equipped with the first and second personal trusted devices is authenticated based on a comparison of the encrypted colorgram that was pushed to the first personal trusted device and displayed, and that was imaged by and what was uploaded from the second personal trusted device.