Systems and methods for information security using one-time pad

• US 8,578,473 B2
• Filed: 03/25/2009
• Issued: 11/05/2013
• Est. Priority Date: 03/25/2009
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: LSI Corporation (Broadcom, Inc.)
• Inventors: Sadler, Lloyd W.
• Primary Examiner(s): Kim, Jung
• Assistant Examiner(s): LEUNG, ROBERT B
• Application Number:
  US12/411,389
• Publication Number:
  US 20100246811A1
• Time in Patent Office: 1,686 Days
• Field of Search: None
• US Class Current: 726/18
• CPC Class Codes: G06F 21/6209 to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: H04L 9/0656 Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
• CPC Class Codes: H04L 9/3226 using a predetermined code, e.g. password, passphrase or PIN network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L63/083

Abstract

A method of verifying a password and methods of encryption and decryption using a key generated from a one-time pad. In one embodiment, the method of verifying includes: (1) receiving a password attempt, (2) retrieving a pointer from memory, (3) searching a one-time pad based on the pointer to retrieve a password, (4) comparing the password attempt with the password and (5) generating a new pointer if the password attempt matches the password.

Claims

1. A method of verifying a password, comprising:

receiving a password attempt;

retrieving, from a computer memory, a single pointer to a position in a common document;

applying at least one of a formula and an offset to said pointer;

retrieving a password by searching said common document stored in said computer memory based on said pointer and said formula or said offset, wherein said pointer includes either a page number and line number of said common document or a chapter number and a paragraph number of said common document;

comparing said password attempt with said password; and

generating and storing in said computer memory a new pointer to a different position in said common document if said password attempt matches said password.

2. The method as recited in claim 1 wherein said offset is a user-selected offset.

3. The method as recited in claim 1 wherein said pointer is formatted such that it appears to be a telephone number.

4. The method as recited in claim 1 further comprising generating a new password based on said new pointer.

5. The method as recited in claim 4 further comprising displaying said new password to a user on an output device.

6. The method as recited in claim 1 wherein said retrieving a password by searching said common document is based on said pointer, said formula and said offset.