Datasheet > AT88SC0204CRF-MR1

AT88SC0204CRF-MR1

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
爱特美尔 - ATMEL		存储可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
9页	305K
描述
13.56 MHz CryptoRF EEPROM Memory 2 Kbits

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AT88SC0204CRF-MR1 数据手册

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AT88SC0204CRF

Communication

Security

Communication between the PICC and reader operates in three basic modes. Standard

mode is the default mode for the device after power-up and anticollision. Authentication

mode is activated by a successful authentication sequence. Encryption mode is

activated by a successful encryption activation, following a successful authentication.

Table 2. Configuration Security Modes

Data Integrity

Mode

Standard

User Data

clear

Passwords

clear

Check

MDC⁽¹⁾

MAC⁽²⁾

Authentication

Encryption

clear

encrypted

Notes: 1. Modification Detection Code

2. Message Authentication Code

Security Methodology

Figure 3. Security Methodology

Device (card)

Host (reader)

Card Number

COMPUTE Challenge A

VERIFY A

Challenge A

Compute Challenge B

Challenge B

VERIFY B

Check Password (RPW)

DATA

Read Password (RPW)

Checksum (CS)

VERIFY CS (optional)

Check Password (WPW)

Write Password (WPW)

DATA

VERIFY CS

Write DATA

Memory Access

Depending on the device configuration, the host will carry out the authentication protocol

and/or present different passwords for each operation: read or write. To insure security

between the different user zones (multiapplication card), each zone can use a different

set of passwords. A specific attempts counter for each password and for the

authentication provides protection against systematic attacks.

5022CS–CRRF–12/06

1 2 3 456 7 8 9

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