AES-XTS for Automotive

In automotive applications, AES-XTS is used to encrypt data stored on a vehicle’s internal storage devices, such as infotainment systems and navigation systems. This helps to protect sensitive information, such as personal data, navigation data, and vehicle settings, from being accessed by unauthorized parties.

What’s AES-XTS?

AES-XTS is a mode of operation for AES encryption that is designed for disk encryption and other applications that require high throughput. It is a widely used standard for disk encryption in automotive applications because it is fast, secure, and easy to implement.

The AES-XTS mode of operation is based on the AES-CBC mode, but it uses two independent AES keys, called the “tweak” key and the “data” key. The tweak key is used to encrypt the data block’s block number, and the data key is used to encrypt the data block itself. This allows for the encryption of each block to be independent of the others, which is important for disk encryption.

The AES-XTS mode of operation is designed to be resistant to known plaintext attacks, which are a type of cryptographic attack where the attacker has access to a known plaintext and its corresponding ciphertext. This is achieved by using a different initialization vector for each block of data, which is generated by encrypting the block number with the tweak key.

AES-XTS implementation in an automotive application

Implementing AES-XTS encryption in an automotive application is relatively straightforward. The AES-XTS mode of operation is supported by many cryptographic libraries and is available in many programming languages. Once the encryption keys have been generated, the encryption process can be integrated into the application’s code.

In summary, AES-XTS is a widely used standard for disk encryption in automotive applications because it is fast, secure, and easy to implement. The AES-XTS mode of operation is based on the AES-CBC mode, but it uses two independent AES keys, called the “tweak” key and the “data” key. This allows for the encryption of each block to be independent of the others, which is important for disk encryption. The AES-XTS mode of operation is designed to be resistant to known plaintext attacks and implemented in automotive application is relatively straightforward.

Design Gateway’s AES-XTS IP Core for FPGA

AES256-XTS IP Core (AES256XTSIP) implement the advanced encryption standard (AES) with XEX Tweakable Block Cipher with Ciphertext Stealing (XTS) which is widely used in protecting the confidentiality of data on storage devices.

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