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| Number | Title | Issue Date |
| 7436956 | Document encryption Encryption of documents is used to restrict access to such documents to those users who have the appropriate decryption keys. The encryption of documents on public web servers hitherto has prevented indexing by search engines. By keeping words and possible sentences... | 10/14/2008 |
| 7369659 | Item handling system An item handling system, comprising: at least one item preparation station for printing machine-readable symbols on items; and at least one item handling station for receiving items from the at least one item preparation station and being operable to machine read an... | 05/06/2008 |
| 7242770 | Secure encryption/decryption for elevators This system relates to a secure encryption/decryption protocol for elevator displays and controls. The protocol uses an algorithm to scramble information before transmission and reassemble it after transmission. The system uses at least one block of data assembled i... | 07/10/2007 |
| 7040664 | Self-verifying security documents A self-verifying security document, such as a banknote, comprises a flexible sheet formed from a plastics substrate bearing indicia. The sheet has a window of transparent plastics material that includes self-verification means for verifying a security device provide... | 05/09/2006 |
| 6909783 | Alphabet soup cryptography Computer methods, systems, and devices, providing automatic permutations of a programmed modified random symbol square matrix producing one time pad messages are disclosed enabling messages to be encrypted from plain text which is typed into a computer thereby selec... | 06/21/2005 |
| 6826281 | Storage-encryption-retrieval device and method with resulting business processes An encryption device includes a card with a grid comprising multiple rows and columns defining boxes for receiving individual characters. One of the columns or rows contains a master password or code character string. Other columns or rows contain encrypted characte... | 11/30/2004 |
| 6621933 | MPEG2 moving picture encoding/decoding system An MPEG2 moving picture and encoding/decoding system to provide digital copy protection of digital moving picture data. The MPEG2 moving picture encoder discrete cosine transforms a video input signal and uses a digital watermark inserter to embed digital... | 09/16/2003 |
| 6571336 | Method and apparatus for securing a list of passwords and personal identification numbers A method for securing passwords, personal identification numbers and identifying patterns utilizes a MasterCode camouflaged within a grid which contains all the characters, symbols or pictograms of which the MasterCode is a subset. For securing numeric se... | 05/27/2003 |
| 6253328 | Method and apparatus for securing passwords and personal identification numbers A method for securing passwords and personal identification numbers utilizes a mastercode. At least ten characters are selected for the mastercode. The selected characters are randomly associated to a corresponding digit, wherein the association defines t... | 06/26/2001 |
| 6209097 | Content protection method and content protection system A recording medium in which a purchased image protected by a copyright or the like has been stored and a recording medium in which a user image has been stored is set, the purchased image as encrypted is decrypted and the images stored in both mediums are... | 03/27/2001 |
| 6175625 | Control circuits for electric coding machines The machine involves code wheels in cascade or in a maze with random or mixed circuits which operate a printing device to print the cipher conjugate of the letter on an operated key when the keyboard is connected to one end of the code wheel maze, and to ... | 01/16/2001 |
| 6130946 | Cryptographs The cryptographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of juxtaposed, rotatable, connection changing mechanisms... | 10/10/2000 |
| 6097812 | Cryptographic system The crytographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of juxtaposed, rotatable, connection changing mechanisms ... | 08/01/2000 |
| 6085178 | Apparatus and method for communicating between an intelligent agent and client computer process using disguised messages An intelligent agent and its client communicate using a selector known by both parties to generate and interpret messages and thereby effectively disguise confidential information transmitted in the messages from third parties. Moreover, a neural network ... | 07/04/2000 |
| 6055635 | Method and device for facilitating access to a multitude of alphanumeric sequences A method and a device for facilitating authorized and simultaneously restraining unauthorized access to a multitude of alphanumeric sequences, for instance for credit cards, code keys and the like. According to the method every correct sequence (e.g. 5533... | 04/25/2000 |
| 5629770 | Document copying deterrent method using line and word shift techniques A method is provided that deters the illicit copying of electronically published documents. It includes publishing a plurality of copies of electronically created material to be distributed to a plurality of subscribers. Each copy of subscriber's document... | 05/13/1997 |
| 5321755 | Information-encrypting device and method A method of encrypting a sequence of characters such as a code number on an information slide or disc is provided. The method allows the encryption of a plurality of sequences on a single user-markable disc or slide which may be deciphered by a reference ... | 06/14/1994 |
| 5307414 | Encryption template An encryption template has a grid of permanent openings thereon forming several arrays which are symmetrically located about a rotational axis, and members for selectively marking certain of the openings to be used for coding a message. Indicia carried on... | 04/26/1994 |
| 5133554 | Lotto ticket card holder A lotto ticket card holder for viewing numbers thereon and for comparing the viewed numbers with the current winning combination. The holder includes a front sheet and a back sheet that is joined thereto along one side edge thereof. A transverse magnifier... | 07/28/1992 |
| 5077796 | Cryptograph An apertured device translatably receives a lottery ticket in juxtaposed relationship with the aperture to display a set of numbers appearing upon the lottery ticket. A panel adjacent the aperture accommodates entry of a predetermined set of numbers to pe... | 12/31/1991 |
| 5056142 | Decryption device A decryption device, comprising a substrate, a plurality of encrypted information symbols located within a rectangular array of further symbols carried by the substrate, wherein the array is arranged in a predetermined number of rows by a further predeter... | 10/08/1991 |
| 5046096 | Windowed rotatable cover which reveals one indicia on one surface and a second indicia on a second surface corresponding to the first that encodes and decodes messages A simple and inexpensive apparatus for encoding and decoding messages is disclosed. The apparatus comprises a first surface having a first series of indicia and a second surface having a series of letters. Each of the letters correspond to a unique one of... | 09/03/1991 |
| 5042157 | Fiber optic angular orientation sensor digital serial encoding A sensor provides remote angular orientation sensing. A rotational signal transmitted to a rotatable input shaft mounted in an encoder body causes the shaft to rotate. Light signals are transmitted through a digital code wheel mounted to the shaft. As the... | 08/27/1991 |
| 4885779 | Personal identification encryptor system with error-correcting code and method An inexpensive encryption device, system and method includes coded alphanumeric characters preprinted according to different key codes on mail-out forms that can be manipulated by a prospective user to yield encrypted data that can be returned over unsecu... | 12/05/1989 |
| 4870683 | Personal identification encryptor system and method An inexpensive encryption device, system and method includes coded alphanumeric characters preprinted according to different key codes or mail-out forms that can be manipulated by a prospective user to yield encrypted data that can be returned over unsecu... | 09/26/1989 |
| 4664418 | Order handling sheet and method A system for handling orders including a sheet defining a plurality of delineated spaces. Indicia are displayed in the spaces for identifying a plurality of items available for ordering, and a pencil or other marking device is used for placing marks in se... | 05/12/1987 |
| 4560164 | Toy puzzle In a tubular toy puzzle, the object is to manipulate indicia on rotatable rings to achieve a desired arrangement of the indicia. Manipulation occurs by rotating a drive mechanism connected with a combination of the rings. Axial repositioning of a drive sh... | 12/24/1985 |
