MIKROE-2522

      Secure click PID: MIKROE-2522 Weight: 25 g   Secure click carries the ATECC508A cryptographic coprocessor with secure hardware-based key storage. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over I2C interface. ATECC508A features Microchip's ATECC508A integrates ECDH (Elliptic Curve Diffie Hellman) security protocol, an ultra-secure method to provide key agreement for encryption/decryption. It also integrates the ECDSA (Elliptic Curve Digital Signature Algorithm) sign-verify authentication for the Internet of Things (IoT) market, including home automation, industrial networking, accessory and consumable authentication, medical, mobile and more. The ATECC508A includes an EEPROM array which can be used for storage of up to 16 keys, certificates, miscellaneous read/write, read-only or secret data, consumption logging, and security configurations. Access to the various sections of memory can be restricted in a variety of ways and then the configuration can be locked to prevent changes. It features a wide array of defense mechanisms specifically designed to prevent physical attacks on the device itself, or logical attacks on the data transmitted between the device and the system. Hardware restrictions on the ways in which keys are used or generated provide further defense against certain styles of attack. Specifications Type  EEPROM  Applications  IoT node security and ID, secure download and boot, ecosystem control,  message security, anti‐cloning, etc.  On‐board modules  ATECC508A cryptographic co‐processor  Key Features  Performs high‐speed public key (PKI) algorithms, NIST Standard P256 elliptic  curve support, SHA‐256 hash algorithm with HMAC option, 256‐bit key length,  storage for up to 16 Keys  Interface  I2C  Input Voltage  3.3V or 5V  Click board size  M (42.9 x 25.4 mm)   Pinout diagram This table shows how the pinout on Secure click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes  Pin  Pin  Notes    NC  1  AN  PWM  16 NC  NC  2  RST  INT  15 NC     NC  3  CS  TX  14 NC  NC  4  SCK  RX  13 NC  NC  5  MISO  SCL  NC  6  MOSI  SDA  11 SDA I2C data          12 SCL  I2C clock      Power supply  +3.3V  7  3.3V  5V  Ground  8  GND  GND  9  GND Ground  GND  10 +5V Power supply  Jumpers and settings Designator  Name  JP1  Default  Position  PWR.SEL.  Left  Default  Option  3.3V  Description  Power Supply Voltage Selection 3.3V/5V, left position  3.3V, right position 5V  Programming Code examples for Secure click, written for MikroElektronika hardware and compilers are available on Libstock. Code snippet The following code snippet gets the public key from slot 0, generates the signature for a message using that key, and then verifies that signature. 01 if (atcab_get_pubkey(0, publicKeyBuffer) == ATCA_SUCCESS) 02 { 03 LOG( "rnrn Public key: " ); 04 outputHex (publicKeyBuffer, 64); 05 } 06 else LOG( "rn Getting public key failed..." ); 07 //Generates the signature from input message, using key in slot 0. 08 if (atcab_sign(0, messageBuffer, signatureBuffer) == ATCA_SUCCESS) 09 { 10 LOG( "rnrn Generating signature: " ); 11 outputHex (signatureBuffer, 64); 12 } 13 else LOG( "rn Generating signature failed..." ); 14 //Verification of signature 15 LOG( "rnrn Signature verification..." ); 16 if (atcab_verify_extern(messageBuffer, signatureBuffer, publicKeyBuffer, responseBuffer) == ATCA_SUCCESS) 17 { 18 if (responseBuffer [0]) 19 LOG( "rn Signature is valid " ); 20 else LOG( "rn Signature is invalid " ); 21 } 22 else LOG( "rn Verification operation failed..." );                                                  https://shop.mikroe.com/secure‐click 8‐2‐17