Encryption processing apparatus, encryption processing unit control apparatus, encryption processing unit, and computer product

• US 20030118189A1
• Filed: 03/20/2002
• Published: 06/26/2003
• Est. Priority Date: 12/20/2001
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Hoshi, Tomoaki, Kadowaki, Shoki, Ibi, Toshiaki, Higashiura, Yasuyuki, Kishino, Takumi
• Application Number:
  US10/101,274
• Publication Number:
  US 20030118189A1
• Time in Patent Office: Days
• US Class Current: 380/277
• CPC Class Codes: H04L 9/0822 using key encryption key
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying

Abstract

The encryption processing apparatus includes a plurality of encryption processing units each of which executes an encryption processing. One encryption processing unit generates a key, encrypts the key, and delivers the encrypted key to the other encryption processing units. Each of the other encryption processing units decodes the received key and stores the key so that the keys stored in all the encryption processing units is same.

Claims

1. An encryption processing apparatus comprising a plurality of encryption processing units each of which executes an encryption processing, wherein

at least one of the encryption processing units generates a key, encrypts the key and delivers the encrypted key to other encryption processing units that have not generated the key, and

each of the other encryption processing units decodes the received key, and stores the key as the key that is the same key as the one generated by the at least one encryption processing unit.

2. The encryption processing apparatus according to claim 1, wherein each of the encryption processing units comprises a consistency unit which keep a consistency of the key stored by that encryption processing unit with the key stored by the other encryption processing units.

3. An encryption processing unit control apparatus comprising:

an encrypted key generation instruction unit which issues an instruction to generate a key, encrypt the generated key and transmit the encrypted key, to a specific encryption processing unit among a plurality of encryption processing unit each of which executes an encryption processing; and

an encrypted key decoding unit which issues an instruction to deliver the encrypted key, decode the encrypted key and hold the same key as the key generated by the specific encryption processing unit, to the other encryption processing units.

4. The encryption processing unit control apparatus according to claim 3, comprising a consistency processing instruction unit which instructs each of the plurality of encryption processing units to perform a key consistency processing to keep the keys stored by the plurality of encryption processing units consistent with one another.

5. An encryption processing control unit comprising:

a key generation unit which generates a key in accordance with an external key generation instruction;

an encrypted key generation unit which generates an encrypted key obtained by encrypting the key to be delivered to the other encryption processing units based on an external encrypted key generation instruction, and then transmits the encrypted key to an outside of the encrypted key generation unit; and

an encrypted key decoding unit which decodes the delivered encrypted key and holds the same key as the key held by the encryption processing unit which generates the key based on an external encrypted key decoding instruction.

6. A computer program which allows a computer to function as:

an encrypted key generation instruction unit which issues an instruction to generate a key, encrypt the generated key and transmit the encrypted key, to a specific encryption processing unit among a plurality of encryption processing unit each of which execute an encryption processing; and

an encrypted key decoding unit which issues an instruction to deliver the encrypted key, decode the encrypted key and hold the same key as the key generated by the specific encryption processing unit, to the other encryption processing units.

7. A computer program which allows a computer to function as:

a key generation unit which generates a key in accordance with an external key generation instruction;

an encrypted key generation unit which generates an encrypted key obtained by encrypting the key to be delivered to the other encryption processing units based on an encrypted key generation instruction, and then transmits the encrypted key to an outside of the encryption processing apparatus; and

an encrypted key decoding unit which decodes the delivered encrypted key and holds the same key as the key held by the encryption processing unit which generates the key based on an external encrypted key decoding instruction.