TRANSACTION RECORDAL SYSTEM

• US 20080101606A1
• Filed: 09/28/2007
• Published: 05/01/2008
• Est. Priority Date: 05/18/2004
• Status: Abandoned Application

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Lapstun, Paul
• Application Number:
  US11/863,262
• Publication Number:
  US 20080101606A1
• Time in Patent Office: Days
• US Class Current: 380/243
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06Q 20/105 involving programming of a portable memory device, e.g. IC cards, "electronic purses"
• CPC Class Codes: G06Q 20/367 involving electronic purses or money safes
• CPC Class Codes: G06Q 20/3674 involving authentication
• CPC Class Codes: G06Q 30/018 Certifying business or products
• CPC Class Codes: G06Q 30/0185 Product, service or business identity fraud
• CPC Class Codes: G06Q 40/08 Insurance
• CPC Class Codes: G06Q 40/12 Accounting
• CPC Class Codes: G07D 7/004 using digital security elements, e.g. information coded on a magnetic thread or strip
• CPC Class Codes: H04L 2209/20 Manipulating the length of blocks of bits, e.g. padding or block truncation
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 2209/805 Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

A method of printing a security document having a security feature, the method including, receiving the security document, and encrypted identity data at least partially indicative of an identity of the security document. The identity is decrypting using a secret key associated with the public key, allowing a signature to be generated using the determined identity. The signature is a digital signature of at least part of the identity. The signature is used in generating coded data at least partially indicative of the identity of the security document and at least part of the signature. The coded data is then printed on the security document.

Claims

1. A method of printing a security document having a security feature, the method including:

receiving the security document;

receiving identity data, the identity data being at least partially indicative of an identity of the security document, the identity data being encrypted using a public key;

determining the identity by decrypting the received identity data using a secret key associated with the public key;

generating a signature using the determined identity, the signature being a digital signature of at least part of the identity;

generating coded data at least partially indicative of;

the identity of the security document; and

,

at least part of the signature; and

,

printing the coded data on the security document.

2. A method according to claim 1, wherein the security document includes visible information, and wherein the method includes overprinting the coded data on the visible information.

3. A method according to claim 1, wherein a secure data store is used for storing document data and where the method includes generating the signature using the data stored in the data store.

4. A method according to claim 1, wherein the method includes encoding the entire signature within a plurality of coded data portions.

5. A method according to claim 1, wherein the method includes:

determining a layout, the layout being at least one of;

a coded data layout, the layout being indicative of the position of each coded data portion on the security document; and

,

a document description, the document description being indicative of the position of the visible information on the packaging; and

,

prints, using the layout, at least one of the coded data and the visible information.

6. A method according to claim 1, wherein a communication system is used for communicating with a database, the database storing data relating the security, including at least one of:

a currency note attribute including at least one of;

currency;

issue country;

denomination;

note side;

printing works; and

serial number;

a check attribute including at least one of;

currency;

issuing institution;

account number;

serial number;

expiry date;

check value; and

limit;

a card attribute including at least one of;

card type;

issuing institution;

account number;

issue date;

expiry date; and

limit.

7. A method according to claim 6, wherein the method includes, at least one of:

updating at least some of the data relating to the security document; and

,

generating the coded data using at least some of the data relating to the security.

8. A method according to claim 1, wherein the signature is a digital signature of at least part of the identity and at least part of predetermined padding, the padding being at least one of:

a predetermined number; and

,

a random number.

9. A method according to claim 1, wherein the coded data includes a plurality of layouts, each layout defining the position of a plurality of first symbols encoding the identity, and a plurality of second symbols defining at least part of the signature.

11. A method according to claim 1, wherein the coded data is substantially invisible to an unaided human.

12. A method according to claim 1, wherein the coded data is printed on the surface using at least one of:

an invisible ink; and

,

an infrared-absorptive ink.

13. A method according to claim 1, wherein the coded data is provided substantially coincident with visible human-readable information.

14. A method according to claim 1, wherein at least some of the coded data portions encode at least one of:

a location of the respective coded data portion;

a position of the respective coded data portion on the surface;

a size of the coded data portions;

a size of a signature;

an identity of a signature part; and

,

units of indicated locations.

15. A method according to claim 1, wherein the coded data includes at least one of:

redundant data;

data allowing error correction;

Reed-Solomon data; and

,

Cyclic Redundancy Check (CRC) data.

16. A method according to claim 1, wherein the digital signature includes at least one of:

a random number associated with the identity;

a keyed hash of at least the identity;

a keyed hash of at least the identity produced using a private key, and verifiable using a corresponding public key;

cipher-text produced by encrypting at least the identity;

cipher-text produced by encrypting at least the identity and a random number; and

,

cipher-text produced using a private key, and verifiable using a corresponding public key.

17. A method according to claim 1, wherein the security document is at least one of:

a currency note;

a check;

a credit or debit card;

a redeemable ticket, voucher, or coupon;

a lottery ticket or instant win ticket; and

,

an identity card or document, such as a driver'"'"'s license or passport.

18. A method according to claim 1, wherein the coded data is arranged in accordance with at least one layout having n-fold rotational symmetry, where n is at least two, the layout including n identical sub-layouts rotated 1/n revolutions apart about a centre of rotation, at least one sub-layout including rotation-indicating data that distinguishes that sub-layout from each other sub-layout.

19. A method according to claim 1, wherein the coded data is arranged in accordance with at least one layout having n-fold rotational symmetry, where n is at least two, the layout encoding orientation-indicating data comprising a sequence of an integer multiple m of n symbols, where m is one or more, each encoded symbol being distributed at n locations about a centre of rotational symmetry of the layout such that decoding the symbols at each of the n orientations of the layout produces n representations of the orientation-indicating data, each representation comprising a different cyclic shift of the orientation-indicating data and being indicative of the degree of rotation of the layout.

20. A printer for printing a security document having a security feature, the printer being for:

receiving the security document;

receiving identity data, the identity data being at least partially indicative of an identity of the security document, the identity data being encrypted using a public key;

determining the identity by decrypting the received identity data using a secret key associated with the public key;

generating a signature using the determined identity, the signature being a digital signature of at least part of the identity;

generating coded data at least partially indicative of;

the identity of the security document; and

,

at least part of the signature; and

,

printing the coded data on the security document.