Secure point of sale presentation of a barcode at an information handling system display

A method for performing a point-of-sale transaction, the method comprising:

• determining a publicly accessible data at a point-of-sale location;
• applying the publicly accessible data to encrypt an account identifier in a barcode;
• presenting the bar code at a display;
• reading barcode from the display with a barcode reader at the point-of-sale location;
• decrypting the barcode with the publicly accessible data at the point-of-sale location;
• and
• applying the account number from the barcode to perform the point-of-sale transaction;
• wherein determining a publicly accessible data at a point of sale location further comprises:
• determining a time from a publicly accessible time source;
• and
• selecting a predetermined portion of the time as an encryption key to encrypt the account identifier.

A point of sale transaction system comprising:

• a portable information handling system having a processor operable to execute instructions to process information, memory interfaced with the processor and operable to store the information and a display interfaced with the processor and operable to present the information as visual images;
• a barcode generator stored in the memory and operable to execute on the processor to apply the information to generate a barcode for presentation at the display;
• a transaction engine stored in the memory and operable to execute on the processor to embed an account identifier and predetermined publicly accessible information in a barcode generated by the barcode generator, the barcode presented at the display, the transaction engine encrypting at least the account identifier by using at least a portion of the publicly accessible information as an encryption key;
• and
• a barcode reader separate from the mobile information handling system and operable to read the barcode from the display, extract the account identifier and apply predetermined publicly accessible information to validate a point-of-sale transaction, the barcode reader decrypting the account identifier with the publicly accessible information used as a decryption key;
• wherein the predetermined publicly accessible information comprises a time associated with generation of the barcode, the barcode generator operable to apply the time to encrypt the account identifier in the barcode, the barcode reader applying a time at which the barcode is read to decrypt the account identifier.

A point of sale transaction system comprising:

• a portable information handling system having a processor operable to execute instructions to process information, memory interfaced with the processor and operable to store the information and a display interfaced with the processor and operable to present the information as visual images;
• a barcode generator stored in the memory and operable to execute on the processor to apply the information to generate a barcode for presentation at the display;
• a transaction engine stored in the memory and operable to execute on the processor to embed an account identifier and predetermined publicly accessible information in a barcode generated by the barcode generator, the barcode presented at the display, the transaction engine encrypting at least the account identifier by using at least a portion of the publicly accessible information as an encryption key;
• and
• a barcode reader separate from the mobile information handling system and operable to read the barcode from the display, extract the account identifier and apply predetermined publicly accessible information to validate a point-of-sale transaction, the barcode reader decrypting the account identifier with the publicly accessible information used as a decryption key;
• wherein the predetermined publicly accessible information comprises a GPS position associated with generation of the barcode, the barcode generator operable to apply the GPS position to encrypt the account identifier in the barcode, the barcode reader applying a GPS position at which the barcode is read to decrypt the account identifier.

A method for restricting use of a transaction barcode, the method comprising:

• sensing a condition at a mobile telephone, the sensed condition comprising a GPS position;
• generating a transaction barcode at the mobile telephone, the transaction barcode including an account identifier and the sensed condition, the sensed condition used as an encryption key to encrypt the transaction barcode;
• presenting the transaction barcode at a display of the mobile telephone;
• reading the transaction barcode from the display of the mobile telephone with a barcode reader;
• sensing the condition at the barcode reader;
• and
• invalidating the transaction if the sensed condition included in the bar code fails to match the sensed condition at the barcode reader.

A method for restricting use of a transaction barcode, the method comprising:

• sensing a condition at a mobile telephone, the sensed condition comprising a time;
• generating a transaction barcode at the mobile telephone, the transaction barcode including an account identifier and the sensed condition, the sensed condition used as an encryption key to encrypt the transaction barcode;
• presenting the transaction barcode at a display of the mobile telephone;
• reading the transaction barcode from the display of the mobile telephone with a barcode reader;
• sensing the condition at the barcode reader;
• and
• invalidating the transaction if the sensed condition included in the bar code fails to match the sensed condition at the barcode reader.