Validating digital content presented on a mobile device

A computer system, comprising:

• a plurality of different tokens, each token located at a different transaction location among a plurality of transaction locations;
• a plurality of computing devices, each computing device located at a different transaction location among the plurality of transaction locations and operative to process transactions at the transaction location;
• a server computer, comprising at least computer readable storage storing information associating each of the plurality of different transaction locations with the different tokens;
• wherein the different tokens generate different time-varying, non-predictable codes, wherein each time-varying, non-predictable code of a token is a sequence of token values generated based on at least secret information, shared between the token and the server computer, and a time-varying value, wherein a current token value at a current time is a function of the secret information and the time-varying value based on the current time;
• a plurality of mobile devices configured to communicate with the server computer and configured to request digital content from the server computer;
• wherein the server computer is operative to:
• receive, at a time, a request from a mobile device, from among the plurality of mobile devices, for digital content associated with a source;
• in response to the request, determine a transaction location, based on a geographic location of the mobile device at the time of the request;
• using the stored information, identify a token associated with the determined transaction location;
• generate a current token value for the identified token associated with the transaction location, based on the time-varying non-predictable code for the identified token, using the secret information for the identified token stored at the server computer and a current time accessible to the server computer;
• transmit the requested digital content and the server-generated current token value to the mobile device;
• wherein the mobile device requesting the digital content is operative to receive, from the server computer, and present, on an output of the mobile device, the digital content and the server-generated current token value;
• wherein the token at the transaction location is operative to generate a current token value based on the time-varying, non-predictable code of the token, using secret information stored in the token and a current time accessible to the token;
• wherein the token at the transaction location is operative to output the token-generated current token value on an output device associated with the token;
• thereby allowing an individual to compare the token-generated current token value as presented on the output device to the server-generated current token value as presented through the output of the mobile device to determine whether the token-generated current token value as presented on the output device matches the server-generated current token value as presented through the output of the mobile device thereby indicating the digital content presented on the mobile device originates from the source;
• wherein the computing device at the transaction location is operative to receive an input indicating whether the token-generated current token value as presented on the output device matches the server-generated current token value as presented on the output of the mobile device thereby indicating the digital content presented on the mobile device originates from the source;
• wherein the computing device at the transaction location is operative to process a transaction associated with the digital content presented on the mobile device based on at least the input indicating that the token-generated current token value as presented on the output device matches the server-generated current token value as presented on the output of the mobile device;
• and
• wherein the plurality of computing devices do not have a computer network connection to a centralized database to validate that digital content presented on the plurality of mobile devices originates from a source.

A computer system, comprising:

• a plurality of different tokens, each token located at a different transaction location among a plurality of transaction locations;
• a plurality of computing devices, each computing device located at a different transaction location among the plurality of transaction locations and operative to process transactions at the transaction location;
• a server computer, comprising at least computer readable storage storing information associating each of the plurality of different transaction locations with the different tokens;
• wherein the different tokens generate different time-varying, non-predictable codes, wherein each time-varying, non-predictable code of a token is a sequence of token values generated based on at least secret information, shared between the token and the server computer, and a time-varying value, wherein a current token value at a current time is a function of the secret information and the time-varying value based on the current time;
• a plurality of mobile devices configured to communicate with the server computer and configured to request digital content from the server computer;
• wherein the server computer is operative to:
• receive, at a time, a request from a mobile device, from among the plurality of mobile devices, for digital content associated with a source;
• in response to the request, determine a transaction location, based on a geographic location of the mobile device at the time of the request;
• using the stored information, identify a token associated with the determined transaction location;
• generate a current token value for the identified token associated with the transaction location, based on the time-varying non-predictable code for the identified token, using the secret information for the identified token stored at the server computer and a current time accessible to the server computer;
• transmit the requested digital content and the server-generated current token value to the mobile device;
• wherein the mobile device requesting the digital content is operative to receive, from the server computer, and present, to an individual through an output of the mobile device, the digital content and the server-generated current token value;
• wherein the token at the transaction location is operative to generate a current token value based on the time-varying, non-predictable code of the token, using secret information stored in the token and a current time accessible to the token;
• wherein the token at the transaction location is operative to present, to the individual, the token-generated current token value on an output device associated with the token thereby allowing an individual to compare the token-generated current token value as presented on the output device to the server-generated current token value as presented through the output of the mobile device to determine whether the token-generated current token value as presented on the output device matches the server-generated current token value as presented through the output of the mobile device thereby indicating the digital content presented on the mobile device originates from the source;
• wherein the computing device at the transaction location is operative to process a transaction associated with the digital content presented on the mobile device in response to an input from the individual after the token-generated current token value and to the server-generated current token value are presented to the individual;
• and
• wherein the plurality of computing devices do not have a computer network connection to a centralized database to validate that digital content presented on the plurality of mobile devices originates from a source.