| 摘要 |
A secure method and system for distributing and verifying encryption and decryption keys as used in any public key encryption scheme to provide authenticity and confidentiality. The public key is encoded in accordance with a 2-D barcode symbology and printed onto a mass produced item for distribution. A value critical amount, such as the value on a purchase receipt, may be encoded together with the public key. The public key is obtained by taking an image of the encoded 2-D barcode and decoding the image into a public key and value critical amount, if any. The public key is extracted and may be stored in an Internet web browser facility by a customer for use in a second on-line transaction. The value critical amount may be displayed on screen to enable a verification to be carried out by the customer that the public key has been correctly generated.
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