Information security via dynamic encryption with hash function

• US 7,457,411 B2
• Filed: 12/12/2003
• Issued: 11/25/2008
• Est. Priority Date: 03/13/2003
• Status: Expired due to Fees

• Current Assignee: Encryptawave Technologies LLC (Inferential Capital LLC)
• Original Assignee: New Mexico Technical Research Foundation
• Inventors: Soliman, Hamdy
• Primary Examiner(s): Lanier; Benjamin E.
• Assistant Examiner(s): Nobahar; Abdulhakim
• Application Number:
  US10/735,445
• Publication Number:
  US 20040184605A1
• Time in Patent Office: 1,810 Days
• Field of Search: 380/44, 380/270, 380/274, 380/277, 713/153, 713/168, 713/169, 713/170, 713/171, 713/182, 726/2, 726/3
• US Class Current: 380/44
• CPC Class Codes: H04L 9/0822 using key encryption key
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04L 9/12 Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
• CPC Class Codes: H04L 9/321 involving a third party or a trusted authority

Abstract

A system and method providing secure information. An encryption key is regenerated by performing byte addition of an encryption key, encrypted data, and a hash vector based upon an encryption key. A hash vector is hashed by scanning indexed bytes of an encryption key and using indices and associated values of indices of an encryption key as indices of two bytes in the hash vector to be swapped. An authentication key is regenerated by performing byte addition of an authentication key, an auxiliary key, and a hash vector based upon an authentication key.

Claims

1. A method of generating an encryption key, the method comprising the steps of:

hashing a hash vector based upon an encryption key by scanning indexed bytes of the encryption key and using indices and associated values of indices of the encryption key as indices of two bytes in a hash vector to be swapped; and

regenerating a new encryption key with the encryption key, encrypted data, and the hash vector based upon the encryption key.

2. The method of claim 1 wherein the step of regenerating a new encryption key with an encryption key, encrypted data, and a hash vector based upon an encryption key comprises performing byte addition of the encryption key, encrypted data, and the hash vector based upon the encryption key.

3. The method of claim 1 wherein the step of regenerating a new encryption key with an encryption key, encrypted data, and a hash vector based upon the encryption key comprises:

selecting a previously encrypted data record; and

regenerating a new encryption key with the encryption key, selected encrypted data, and the hash vector based upon the encryption key.

4. The method of claim 3 wherein the step of selecting a previously encrypted data record comprises:

randomly selecting an index from a predetermined range using a byte of the encryption key as a seed of random generation; and

selecting the previously encrypted data record corresponding to the selected index.

5. The method of claim 1 wherein the step of regenerating a new encryption key with an encryption key, encrypted data, and a hash vector based upon the encryption key comprises regenerating a new encryption key with the encryption key, previously encrypted data, a the hash vector based upon the encryption key, and a received cipher record.

6. A method of generating an encryption key, the method comprising the steps of:

generating n encryption keys;

encrypting n tracks of data records with n tracks of parallel encryption operation;

hashing a hash vector based upon the encryption key by scanning indexed bytes of the encryption key and using indices and associated values of indices of the encryption key as indices of two bytes in a hash vector to be swapped; and

regenerating an encryption key with the encryption key, the hash vector based upon the encryption key, and selected encrypted data.

7. The method of claim 6 wherein the step of regenerating an encryption key with the encryption key, a hash vector based upon the encryption key, and selected encrypted data comprises:

randomly selecting an index from a predetermined range using a byte of the encryption key as a seed of random generation; and

selecting the previously encrypted data record corresponding to the selected index.

8. A method of generating an encryption key, the method comprising the steps of:

hashing a hash vector based upon an encryption key by scanning indexed bytes of the encryption key and using indices and associated values of indices of the encryption key as indices of two bytes in a hash vector to be swapped;

encrypting a data record with the hash vector based upon the encryption key; and

regenerating the encryption key with the encryption key and encrypted data.

9. The method of claim 8 wherein the step of encrypting a data record with a hash vector based upon an encryption key comprises performing a logic operation on a data record and the hash vector based upon the encryption key.

10. The method of claim 9 wherein the step of performing a logic operation on a data record and a hash vector based upon an encryption key comprises performing an XOR operation on a data record and a hash vector based upon the encryption key.

11. The method of claim 8 further comprising the step of decrypting encrypted data, comprising performing a logic operation on an encrypted data record and the hash vector based upon the encryption key.

12. The method of claim 11 wherein the step of performing a logic operation on an encrypted data record and a hash vector based upon an encryption key comprises performing an XOR operation on an encrypted data record and the hash vector based upon the encryption key.

13. A system for generating an encryption key, the system comprising:

a source node;

a destination node;

a data stream created at said source node;

means for encrypting data of said data stream with a hash vector based upon an encryption key;

means for hashing the hash vector based upon the encryption key by scanning indexed bytes of the encryption key and using indices and associated values of indices of the encryption key as indices of two bytes in a hash vector to be swapped; and

means for regenerating a new encryption key with the encryption key, encrypted data, and the hash vector based upon the encryption key.