Electronic indicia in bit-mapped form

Details Electronic indicia in bit-mapped form Electronic indicia in bit-mapped form

1988-09-19

1990-08-14

Cangialosi, Salvatore

Cryptography

Electric signal modification

Having production of printed copy

380 30, 380 54, H04L 900

Patent

active

049493817

ABSTRACT:
An item bearing bit-mapped indicia with information encrypted by a public key which verifies a status of the item and a method and apparatus for applying such indicia. The indicia represents an encrypted message and has the form of an array of pixels, each pixel having a value selected from a predetermined set of values in accordance with a mapping of an encrypted message on to the array. Thus, a person having knowledge of the appropriate decryption key may scan the indicia to obtain the message and verify the status by decrypting the message. In one embodiment disclosed, the item is a mail piece and the status is the payment of postage. The indicia may have the form of a binary matrix transformed by matrix multiplication by a corresponding Hadamard matrix and the encrypted message may be encrypted using a public key encryption system.

REFERENCES:
patent: 4322577 (1982-03-01), Brandstrom
patent: 4637051 (1987-11-01), Clark
patent: 4649266 (1987-03-01), Eckert
patent: 4658094 (1987-04-01), Clark
patent: 4692603 (1987-09-01), Brass et al.
patent: 4728783 (1988-03-01), Brass et al.
patent: 4754127 (1988-06-01), Brass et al.
patent: 4757537 (1988-07-01), Edelmann et al.
patent: 4776013 (1988-10-01), Kafri et al.
patent: 4782221 (1988-11-01), Brass et al.
patent: 4802218 (1989-01-01), Wright et al.
patent: 4831555 (1984-05-01), Sansone et al.
patent: 4835713 (1989-05-01), Pastor

Affiliated with

Also associated with

Rating

Electronic indicia in bit-mapped form does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic indicia in bit-mapped form, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic indicia in bit-mapped form will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-468778