Security
ICE-IP-338 High-speed Inline XTS-GCM Multi-Stream Engine
The ICE-IP-338 (EIP-338) Inline Cipher Engine is a scalable, high-performance, multi-stream inline cryptographic engine that offers XTS and GCM modes of operation on bulk data for the AES and optionally SM4 algorithms. Its flexible data path is suitable to scale from 50 Gbps to 2 Tbps providing a tailored engine with minimal area for your application.
The flexible interface makes it possible to perform processing for many different applications and protocols, including inline memory encryption, inline disk encryption, MACsec, IPsec and OTN security. The multi-stream architecture allows interleaved data processing for many independent data streams simultaneously. Switching between streams can be done every clock cycle without loss of performance. Data is processed without flow control and with fixed latency, dependent on the static configuration selected.
The ICE-IP-338 data path can be scaled to widths that are multiples of 128 bit to allow a tradeoff between area and performance that best fits the target application. Configuration options include or exclude support for CipherText Stealing (CTS), the GCM mode, and the SM4 algorithm.
On-chip SRAM external to the ICE-IP-338 is used to store the key database as well as various precomputes and state information for each of the streams the engine is processing in interleaved fashion.
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Product BriefHow the ICE-IP-338 High-speed Inline Cipher Engine Works
The ICE-IP-338 is a data-processing engine and contains input/output data interfaces and interfaces intended for supplying key material that is stored in the engine’s local SRAM.
Before cryptographic processing can start, the Host CPU transfers the key material, together with the algorithm and mode of operation to use, to one of the key slots in the engine. Key material can be shared between multiple streams and many blocks while the key remains available in local SRAM.
The Tweak (for XTS) or IV (for GCM) is provided prior to or at the same time as the first data word, together with a reference to the Key slot and the direction of processing in case of GCM. After processing, the ICE-IP-338 outputs the result data and, in case of GCM mode, authentication tag together with the last output data word.
The external system is responsible for the following items:
- Per-block Tweak or IV generation
- Key lifetime management, to ensure that the key is refreshed when the current key expires
- XTS decrypt key generation in case of an engine configuration without Decrypt Key generator
- Reacting to processing errors reported by the ICE-IP-338
Separate IP cores can be provided to assist with Tweak or Decrypt Key generation.
Full Disk Encryption of Solid State Drives and Root of Trust
File encryption, file system encryption and full disk encryption (FDE) are methods offered by the industry to allow users to protect their data stored on non-volatile storage devices, such as Solid State Disks (SSD). The main feature of FDE is to protect stored system and user date from unauthorized reading, writing, alteration, moving or rolling back. However, extended security features are key to securing FDE implementation.
Solution Offerings
Performance and Configuration
- One input word per clock without any backpressure
- Design can switch stream, algorithm, mode, key and/or direction every clock cycle
- GCM: throughput is solely determined by the data width, data alignment and clock frequency
- XTS: block processing rate may be limited by the number of configured tweak encryption & CTS cores; a configuration allowing 1 block/clock is available
- Design achieves up to 2 GHz in 7nm technologies (DPA: 1 GHz)
Low Latency with Zero Variation
- Low-latency processing with fixed latency per static pipeline configuration.
- Pipeline can be statically configured to reduce latency in cases where certain modes or algorithms are not in use
Cryptographic Processing
- Bi-directional design
- XTS: direction selected on per-key basis
- GCM: direction selected on per-packet basis
- Uni-directional XTS design for reduced area (option)
- Authenticated encryption & decryption: GCM (option)
- Authentication: GMAC (option)
- Encryption: CTR
- Algorithms: AES and option for SM4
- DPA countermeasure option
- Key sizes: 128 and 256 bits
- Tag output
- External 96-bit IV generation that allows supporting various use cases
Packet Interface
- Push-bus time-sliced interface without handshake
- Each data word may belong to a different stream
- Sideband signals for control and processing status
- Configurable bus width, depending on desired throughput in multiples of 128-bit units
Control Plane Interface
- Key loading interface can easily be mapped to a 32-bit wide host interface
- Key set separate from stream state; allows for many parallel streams sharing a limited set of keys to reduce storage requirements
External Memory Interface
- Interfaces to buffer data and control information
- Interfaces are for 1R/1W memory with 2-cycle read latency to allow inserting ECC logic
- ECC uncorrectable status input
- Some memories have per-word chip selection for efficient power usage
Clocking
- Single-clock synchronous design with a number of switchable clock domains for efficient power usage
FIPS Certification
- FIPS 140-3 CAVP, XTS-AES, AES-CTR, AES-GMAC, AES-GCM
Packages
- RTL IP
- Driver Development Kit
Complete Documentation
- Hardware integration guide
- Hardware integration manual
Tools and Scripts
- Verilog for synthesis and simulation
- All scripts and support files needed for standard EDA tool flows
Integration Support
- Complete verification test bench
- Comprehensive set of test vectors
Resources
Videos
