Key Register Bank

Product Specifications

Technical details and manufacturing context for Key Register Bank

Definition

The Key Register Bank is a critical hardware component within the Cryptographic Engine Core responsible for the secure storage, retrieval, and management of cryptographic keys. It acts as a protected repository where symmetric keys, asymmetric private keys, and initialization vectors are held during cryptographic processing. Its design ensures keys are isolated from general-purpose memory and accessible only to authorized cryptographic circuits, preventing unauthorized access or leakage. The bank typically supports a storage capacity of 16 to 64 keys, with key widths ranging from 128 to 256 bits, accommodating AES-128, AES-192, and AES-256 algorithms. Access times for reading or writing a key are in the range of 1 to 10 nanoseconds. The component operates within a supply voltage range of 1.8 to 3.3 volts, with typical active power consumption between 10 and 100 milliwatts. It is designed for industrial temperature ranges from -40°C to 85°C, and storage temperatures from -55°C to 125°C, with relative humidity tolerance of 5% to 95% non-condensing. Data retention is specified at 10 to 20 years, and write endurance is rated at 100,000 to 1,000,000 cycles per key slot. The package footprint is typically QFN or BGA, ranging from 5x5 mm to 10x10 mm, with tamper resistance rated IP54 to IP65 per IEC 60529. The Key Register Bank is fabricated on silicon with metal interconnects such as copper. It is essential for secure key management in cryptographic systems, ensuring that keys are never exposed on external buses or in unprotected memory. For specific applications, verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The Key Register Bank operates by receiving keys from a secure key loader or key derivation function. It stores these keys in volatile or non-volatile registers with hardware-based access controls. When the cryptographic engine requires a key for an operation (e.g., AES encryption), it sends a request to the Key Register Bank. The bank authenticates the request, retrieves the specified key from its protected storage, and transfers it directly to the relevant cryptographic processing unit (e.g., cipher block), ensuring the key is never exposed on external buses or in unprotected memory.

Common Materials

Silicon (for integrated circuits), Metal interconnects (e.g., copper)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Storage Capacity	16–64 keys	Number of cryptographic keys that can be stored simultaneously.
Key Width	128–256 bit	Supports AES-128, AES-192, AES-256.
Access Time	1–10 ns	Time to read or write a key.
Supply Voltage	1.8–3.3 V	Core and I/O voltage range.
Power Consumption	10–100 mW	Typical active power consumption.
Operating Temperature	-40–85 °C	Industrial temperature range.
Storage Temperature	-55–125 °C	Non-operating storage range.
Relative Humidity	5–95 %	Non-condensing.
Data Retention	10–20 years	Retention of keys without power.
Write Endurance	100k–1M cycles	Number of write cycles per key slot.
Tamper Resistance	IP54–IP65	Protection against dust and water ingress.IEC 60529
Package Footprint	5×5–10×10 mm	QFN or BGA package size.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Key Register Array Part
Individual storage elements (registers) that hold the cryptographic key data.

Material: Silicon-based flip-flops or SRAM cells
Access Control Logic
Hardware circuit that validates requests and enforces security policies for key read/write operations.

Material: Silicon logic gates
Key Bus Interface Part
Physical connection and protocol handler for transferring keys to/from the cryptographic processing units.

Material: Metal interconnects, silicon I/O circuits

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Cryptographic Engine Core

View system integration details

Manufacturers of Key Register Bank

Manufacturer profiles associated with Key Register Bank.

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Frequently Asked Questions

What is the storage capacity of the Key Register Bank?

The Key Register Bank can store between 16 and 64 cryptographic keys simultaneously, depending on the specific model and configuration. Verify the exact capacity with the manufacturer for your application.

What key widths are supported?

It supports key widths from 128 to 256 bits, covering AES-128, AES-192, and AES-256 encryption algorithms. Confirm the supported key widths for your specific model.

What is the operating temperature range?

The industrial operating temperature range is -40°C to 85°C, with a storage temperature range of -55°C to 125°C. Ensure your environment meets these conditions.

How does the Key Register Bank ensure key security?

Keys are stored in isolated registers with hardware-based access controls, accessible only to authorized cryptographic circuits. The bank authenticates requests and transfers keys directly to processing units, preventing exposure on external buses or in unprotected memory.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (electronic component)
other spec:	Humidity: 5% to 95% non-condensing, Power Supply: 3.3V ±10%
temperature:	-40°C to +85°C

Product Specifications

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