AT88SA10HS-TSU-T View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88SA10HS-TSU-T

Atmel CryptoAuthentication Host Security Chip

Atmel Corporation 

6.1 HOST0

Concatenates the key stored in AT88SA10HS with an input 256-bit challenge and generates the digest of this message. The

result is left in internal memory and cannot be read. In general, the challenge should be a random number generated by the

host system, which will be sent to both the host (AT88SA10HS) and client (AT88SA100S or AT88SA102S).

Table 6-1. Input Parameters

Opcode

Param1

Param2

Data

Name

HOST0

Overwrite

KeyID

Challenge

Size

1

1

2

32

Notes

0x08

If non-zero, overwrite part of internally generated key with secret fuses

The internal key to be used to generate the digest

Challenge to be sent to the client AT88SA100S or AT88SA102S

Table 6-2. Output Parameters

Name

Size Notes

Success

1 Upon successful completion of HOST0, a value of zero will be returned by AT88SA10HS

The 512-bit message block that will be hashed with the SHA-256 algorithm will consist of:

256-bits

key[KeyID]

256-bits

challenge

If the overwrite parameter is 0, then the 512-bit message block that will be hashed using the SHA-256 algorithm will consist of:

256-bits

key[KeyID]

256-bits

challenge

If the overwrite parameter has a value of 0x01, then the 512-bit message block that will be hashed using the SHA-256

algorithm will consist of:

192-bits

key[KeyID]

64-bits

Fuse[0-63]

256-bits

challenge

All other values of the overwrite parameter are not recommended for use.

Atmel AT88SA10HS [DATASHEET] 13

8595G−CRYPTO−9/11

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