US 11,039,036 B2Granted

Encrypting and decrypting postscript language

AssigneeHydragraphix LLC

InventorsKenneth E. Irwin, Jr., Fred W. Finnerty

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Abstract

A method of encrypting at least a portion of PostScript vector language, where the PostScript vector language includes a cleartext portion and a ciphertext portion, the method including: (a) encrypting at least a part of the PostScript cleartext portion via an encryption algorithm with a generated encryption key resulting in at least a part of the ciphertext portion and overwriting the PostScript cleartext portion with the resulting at least part of the ciphertext portion; (b) saving the encryption key in a file separate from a file containing the PostScript vector language; (c) linking both the encryption key file and the PostScript file in an image processor interpreting the PostScript vector language to display or print PostScript graphics; (d) decrypting the at least part of the ciphertext portion resulting in decrypted PostScript cleartext; and (e) executing the resulting decrypted Postscript cleartext to produce an image on a document or screen.

Claims24

Dependent claims

A method of producing a printed image on a document including printed PostScript indicia by employing PostScript vector language to encrypt and decrypt at least a portion of PostScript vector data, wherein the PostScript vector data comprises a cleartext portion and a ciphertext portion, the method comprising:

(a) encrypting at least a part of the PostScript cleartext portion via a PostScript executable encryption algorithm with a generated encryption key resulting in at least a part of the ciphertext portion and overwriting the PostScript cleartext portion with the resulting at least part of the ciphertext portion, wherein the PostScript executable encryption algorithm executes within the PostScript vector language;
(b) saving the encryption key in at least one file separate from a file containing the PostScript vector data;
(c) linking both the encryption key file and the PostScript file in a Raster Image Processor (RIP) interpreting the PostScript vector data to print PostScript graphics;
(d) decrypting the at least part of the ciphertext portion via a PostScript executable decryption algorithm executed by the RIP, thereby resulting in decrypted PostScript cleartext, wherein the PostScript executable decryption algorithm executes within the PostScript vector language;
and
(e) executing the resulting decrypted Postscript cleartext to produce a printed image on a document.

3 more elements

A method of printing indicia on instant lottery tickets or other documents, wherein PostScript vector language is employed to encrypt and decrypt at least a portion of PostScript vector data for printing on the instant lottery tickets or other documents, and wherein the PostScript vector data comprises a cleartext portion and a ciphertext portion, and wherein the printed instant lottery tickets or other documents include printed PostScript indicia, the method comprising:

(a) encrypting at least a part of the PostScript cleartext portion via a PostScript executable encryption algorithm with a generated encryption key resulting in at least a part of the ciphertext portion and overwriting the PostScript cleartext portion with the resulting at least part of the ciphertext portion, wherein the PostScript executable encryption algorithm executes within the PostScript vector language;
(b) saving the encryption key in at least one file separate from a file containing the PostScript vector data;
(c) transmitting at least a portion of the cleartext and ciphertext PostScript vector data to a printing Raster Image Processor (RIP);
and
(d) at the time of printing:
transmitting the separate encryption key file to the printing RIP that received the at least portion of the PostScript vector data,
(ii) linking both the encryption key file and the PostScript vector data in the printing RIP imaging the PostScript vector data to print PostScript graphics,
(iii) decrypting the at least part of the ciphertext portion via a PostScript executable decryption algorithm executed by the printing RIP, thereby resulting in decrypted PostScript cleartext, and
(iv) executing the resulting decrypted Postscript cleartext to print indicia on the instant lottery tickets or other documents.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/769,734Filed 21 Oct 2016 · us provisional application
Priority: 21 Oct 2015
Published: US 2018/0315352 A11 Nov 2018
Granted: 15 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification39 codes

H04N 1/32272
Combined with processing of the image: encryption or ciphering
A63F 3/0655
Tickets or accessories for use therewith: printing of tickets, e.g. lottery tickets
A63F 3/0665
Tickets or accessories for use therewith: having a message becoming legible after rubbing-off a coating or removing an adhesive layer
B41M 3/14
Printing processes to produce particular kinds of printed work, e.g. patterns: security printing