AT88SA10HS(2009) データシートの表示（PDF） - Atmel Corporation

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AT88SA10HS
(Rev.:2009)

CryptoAuthentication Host Security Chip

Atmel Corporation 

4.5.

GenPersonalizationKey

Loads a personalization key into internal memory and then uses that key along with an input seed to generate a

decryption digest using SHA-256. Neither the key nor the decryption digest can be read from the chip. Upon

completion, an internal bit is set indicating that a secure personalization digest has been loaded and is ready to use by

the BurnSecure command. This bit is cleared (and the digest lost) when the watchdog timer expires or the power is

cycled.

This command will fail if Fuse[87] has been burned.

Table 17.

Opcode

Param1

Param2

Input Parameters

Name

GenPers

Zero

KeyID

Data

Seed

Size

1

1

2

16

Notes

0x20

Must be 0x00

Identification number of the personalization key to be loaded.

Seed for digest generation. The least significant bit of the last byte is

ignored by the AT88SA10HS.

Table 18. Output Parameters

Name

Size

Notes

Success

1 Upon successful execution, a value of 0 will be returned by the AT88SA10HS.

The SHA-256 message body used to create the resulting digest internally stored in the chip consists of the following

512 bits:

256 bits

64 bits

127 bits

1 bits

64 bits

PersonalizeKey[KeyID]

Fixed value of all 1’s

Seed from input stream

‘1’ pad

length of message in bits, fixed at 512

18 AT88SA10HS Host Authentication Chip [Preliminary]

8595B–SMEM–09/09

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