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參數(shù)資料
| 型號(hào)： | AT88SA102S-SH-T |
| 廠商： | Atmel |
| 文件頁數(shù)： | 21/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC BATTERY AUTHENTICATION 8SOIC |
| 產(chǎn)品培訓(xùn)模塊： | CryptoAuthentication™ Introduction |
| 標(biāo)準(zhǔn)包裝： | 4,000 |
| 系列： | CryptoAuthentication™ |
| 類型： | 驗(yàn)證芯片 |
| 應(yīng)用： | 網(wǎng)絡(luò)和通信 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
5
1.6
SHA-256 Computation
AT88SA102S performs only one cryptographic calculation – a keyed digest of an input challenge. It includes optionally various
other information stored on the chip within the digested message.
AT88SA102S computes the SHA-256 digest based on the algorithm documented here:
Throughout this document, the complete message processed by the AT88SA102S chip is documented. According to the
above specification, this always includes a single bit of ‘1’ pad after the message, followed by a 64-bit value representing the
total number of bits being hashed (less pad and length). If the length is less than 447 (512-64-1), then the necessary number
of ‘0’ bits are included between the ‘1’ pad and ‘length’ to stretch the last message block out to 512-bits.
When using standard libraries to calculate the SHA-256 digest, these pad and length bits should probably not be passed to the
library as most standard software implementations of the algorithm add them in automatically.
1.6.1
SHA Computation Example
In order to ensure that there is no ambiguity, the following example vector is provided in addition to the sample vectors in the
NIST document. In this example, all values are listed in hex format. For all but the key, bytes are listed in the order that they
appear on the bus – first on the bus is listed on the left side of the page. The key value below is listed in the same order as the
challenge, so the 01 at the left of the key string corresponds to the first byte in the SHA-256 document.
SHA Computation Example
Key
01030507090B0D0F11131517191B1D1F21232527292B2D2F31333537393B3D3F
Challenge
020406080A0C0E10121416181A1C1E20222426282A2C2E30323436383A3C3E40
Opcode
08
Mode
50 (all optional information included in message)
KeyID
Secret Fuses
0000111122223333
Status Fuses
445566
Fuse MfrID
77
Fuse SN
8899AABB
ROMMfrID
CCDD
ROM SN
EEFF
The 88-bytes over which the digest is calculated are:
0103…3D3F0204…3E400850FFFF00001111…EEFF
And the resulting digest is:
6CA7129C8DA9CE80EA6357DDCFB1DDCBBBD89ED373419A5A332D728B42642C62
1.7
Security Features
The AT88SA102S incorporates a number of physical security features designed to protect the keys from release. These
include an active shield over the entire surface of the part, internal memory encryption, internal clock generation, glitch
protection, voltage tamper detection and other physical design features.
Pre-programmed keys stored on the AT88SA102S are encrypted in such a way as to make retrieval of their values via outside
analysis very difficult.
Both the clock and logic supply voltage are internally generated, preventing any direct attack via the pins on these two signals.
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| AT88SA102S-TH-T | 功能描述:序列號(hào)注冊(cè) 58951-Eb CryptoAuth SHA-256 GRN RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度: 電源電壓-最大: 電源電壓-最小: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: |
| AT88SA102S-TSU-T | 功能描述:序列號(hào)注冊(cè) Product Auth. IC CryptoAuth SHA-256 RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度: 電源電壓-最大: 電源電壓-最小: 最大工作溫度: 最小工作溫度: 安裝風(fēng)格: 封裝 / 箱體: |
| AT88SA10HS | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:CryptoAuthentication? Host Security Chip |
| AT88SA10HS_10 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Atmel CryptoAuthentication Host Security Chip |
| AT88SA10HS_11 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Atmel CryptoAuthentication Host Security Chip |
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