NRF9160-SICA-R7 datasheet(80/400 Pages) NORDIC

80 / 400 page

Peripherals

• Prime field: secp160k1, secp192k1, secp224k1, secp256k1

• Edwards/Montgomery curves:

• Ed25519, Curve25519

• ECDH/ECDSA support

• Secure remote password protocol (SRP)

• Up to 3072-bit operations

• Hashing functions

• SHA-1, SHA-2 up to 256 bits

• Keyed-hash message authentication code (HMAC)

• AES symmetric encryption

• General purpose AES engine (encrypt/decrypt, sign/verify)

• 128-bit key size

• Supported encryption modes: ECB, CBC, CMAC/CBC-MAC, CTR, CCM/CCM* (CCM* is a minor

variation of CCM)

• ChaCha20/Poly1305 symmetric encryption

• Supported key size: 128 and 256 bits

• Authenticated encryption with associated data (AEAD) mode

6.1.1 Usage

The CRYPTOCELL state is controlled via a register interface. The cryptographic functions of CRYPTOCELL are

accessible by using a software library provided in the device SDK, not directly via a register interface.

To enable CRYPTOCELL, use register ENABLE on page 82.

Note: Keeping the CRYPTOCELL subsystem enabled will prevent the device from reaching the

System ON, All Idle state.

6.1.2 Always-on (AO) power domain

The CRYPTOCELL subsystem has an internal always-on (AO) power domain for retaining device secrets

when CRYPTOCELL is disabled.

The following information is retained by the AO power domain:

• 4 bits indicating the configured CRYPTOCELL lifecycle state (LCS)

• 1 bit indicating if the hard-coded RTL key, KPRTL (see RTL key on page 81), is available for use

• 128-bit device root key, KDR (see Device root key on page 81)

A reset from any reset source will erase the content in the AO power domain.

6.1.3 Lifecycle state (LCS)

Lifecycle refers to multiple states a device goes through during its lifetime. Two valid lifecycle states are

offered for the device - debug and secure.

The CRYPTOCELL subsystem lifecycle state (LCS) is controlled through register HOST_IOT_LCS on page

85. A valid LCS is configured by writing either value

Debug or Secure into the LCS field of this

the abovementioned register. The LCS_IS_VALID field value will change from

Invalid to Valid once a

valid LCS value has been written.

4418_1315 v2.0

NRF9160-SICA-R7 Datasheet(PDF) 80 Page - Nordic Semiconductor

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