The AES instruction set is a collection of processor instructions that accelerates parts of the Advanced Encryption Standard (AES) in hardware. Intel calls its implementation AES-NI. It is not a different cipher or an encryption mode: compatible software must use the instructions to benefit, and actual speed gains depend on the processor, implementation, and workload.
What AES-NI means
AES is a symmetric-key encryption algorithm. AES-NI is Intel’s name for processor instructions that carry out computationally intensive AES operations, including encryption and decryption rounds and assistance with generating round keys. Intel describes AES-NI as a set of SIMD instructions for AES encryption and decryption. Intel’s AES-NI overview and its processor documentation explain the extension and its role.
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The distinction matters: AES defines the cipher, while AES-NI is a hardware facility that software can use to implement it more efficiently. AES-NI is not itself a cipher, mode of operation, or a feature that encrypts files automatically.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsWhat the six AES-NI instructions do
Intel documents six AES-NI instructions. Four handle encryption or decryption rounds; one performs an inverse transformation used in decryption; and one assists with key expansion. Intel’s instruction overview describes their roles.
#1 Best Overall
- 【Processor & OS】Firewall Mini PC with Intel J3710 CPU up to 2.64GHz, 4Cores 4threads 2MB L2 Cache, TDP 6.5w, supports AES-NI. It tested with pf-sens/opn-sense linux ubuntu and other popular open source os. ("DEL" key to enter BIOS)
- 【Interfaces】The firewall pc has 4 * Intel I226 lan ports, 2 * USB3.0 ports, 1 * RS232COM port, 2 * HD port, 1 * DC port. Equipped with VESA mount, you can install the micro pc behind the monitor to save space.
- 【Fanless Design】only 6.5W; fanless heat dissipation design, aluminum alloy shell, efficient and fast heat dissipation, which can withstand temperatures up to 60°C. support 24/7 hours working, no noise.
- 【RAM & Storage】The firewall router equipped with 8G DDR3 RAM, max support 8GB; 64GB mSATA SSD, up to 512GB. Not support HDD. Size:5.27 * 4.98 * 1.43 inches, Weigh:500g, small but powerful.
- 【12 Months Service】You will get a firewall pc and accessories，If you encounter any problems during the use, please contact us through Amazon, we have a professional and efficient team dedicated to serving you.
| Instruction | Role |
|---|---|
AESENC |
Performs a non-final AES encryption round. |
AESENCLAST |
Performs the final AES encryption round. |
AESDEC |
Performs a non-final AES decryption round. |
AESDECLAST |
Performs the final AES decryption round. |
AESIMC |
Performs the inverse mix-column transformation used in the equivalent inverse cipher. |
AESKEYGENASSIST |
Assists with generating round keys from the cipher key. |
The names reflect their purpose: ENC and DEC refer to encryption and decryption, while LAST marks the final round. AESKEYGENASSIST supports key-schedule work; it does not replace the cipher key or generate a complete encryption process on its own.
How AES rounds relate to the instructions
AES operates on 128-bit data blocks. Its standard key lengths are 128, 192, and 256 bits, which use 10, 12, and 14 rounds respectively. Intel’s Software Developer’s Manual documents these block, key, and round sizes along with the instruction behavior.
Rank #2
- 1*SO-DIMM DDR5 memory 4800MHz compatible with 5200/5600MHZ
- 4*Intel i226-V network card chip full UDE2.5G with filter connector
- HDM12.1+DP1.4 dual display interface, support 4096 x 2160@60Hz
- M.2NVMe x4 high-speed interface, can split multiple M.2 hard drives through the adapter board
- M.2 WiFi slot supports Bluetooth/WiFi6 wireless receiving block;M.2 WiFi interface supports adapter board expansion M.2NVMe or mSATA solid state disk
The round instructions operate on AES data as the cipher progresses. Encryption uses the non-final round instruction for intermediate rounds and the final-round instruction at the end; decryption has corresponding non-final and final instructions. Key expansion prepares round keys used during the cipher, and the inverse mix-column operation supports the equivalent inverse decryption process.
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What AES-NI support does—and does not—tell you
A processor must support AES-NI, and the software performing encryption or decryption must use the instructions, either directly or through a library or compiler implementation. Their presence alone does not make every application faster or automatically secure. Performance depends on how much of a workload is spent in AES operations, as well as the processor and software implementation. Intel’s older overview discusses workload-dependent acceleration, not a guaranteed speedup for every system.
Rank #3
- Powerful 12th Gen N300 Processor: Glovary Firewall Box Computer with Twin Lake 12th Gen N300 Processor, 8 Cores 8 Threads, 6M Cache, up to 3.8 GHz, TDP 7W. Supports OPNsense, Linux, Openwrt, etc
- 6 x i226V 2.5GbE Lan: Firewall router with 6 x i226-V network card, 2.5x faster than common Gigabit Ethernet. Soft Router can monitor network data, improve network security, powerful and widely used
- DDR5 RAM 2 x M.2 NVMe Slot: Micro firewall appliance with 1 x DDR5 SO-DIMM, 2 x M.2 2280 NVMe SSD slot, 1 x SATA 3.0 for 2.5" SSD/HDD (SATA 3.0 Cable Included)
- UHD Graphics & Triple Display: Mini PC Firewall with 2HD+Type-C triple display interfaces support 4K@60Hz, N300 processor integrated UHD Graphics. Fanless design with aluminium alloy body, quiet running without noise. Supports 12V 4 Pin 80 x 10mm small fan (Package includes 4Pin fan cable)
- Package Contents: 1 xGlovary firewall appliance, 1 xPower adapter, 1 xSATA 3.0 cable, 1 x4pin fan cable, 1 xVESA bracket. Rich interfaces: 6 x2.5G i226V-LAN, 2 xHD, 1 xType-C, 1 xUSB3.2, 4 xUSB2.0, 1 xTF Card slot supports data storage and system boot
AES-NI support is processor-specific. Intel’s 12th Generation Core processor datasheet says the capability may not be available on every SKU. Check the exact processor model’s specifications rather than assuming all processors in a generation or product family include it. Intel’s 12th Generation Core datasheet states this qualification for that processor family.
“AES-NI” is Intel’s terminology. The cited Intel documentation does not establish a vendor-by-vendor comparison or cover naming across other processor makers, so the term should not be treated as proof that Intel is the only source of hardware AES acceleration.
Quick Recap
Best Value
- Intel Processor N150: Intel Twin Lake N150 Processor quad core 4 threads, 6M Cache, up to 3.60 GHz, supports Inter AES-NI
- Ports: 6* 2.5Gbe RJ45 LAN, 4*USB2.0, 1*USB3.0, 1*DC IN, 1*TF solt, 1*Type-C, 2*HDMI 2.1 support dual-screen 4K display
- Storage & Memory: The firewall mini pc comes with 1*SO-DIMM DDR5 RAM slot, supports up to 32GB; 2*M.2 NVMe x1 solt and 1* SATA3.0
- 6 Intel I226-V 2.5G NIC Ports: The fanless firewall mini PC is powered by Intel i226-V NIC chips, which supports 6 2.5 Gigabit Ethernet and is more stable, faster and consumes less power than i225 NIC. It has good compatibility with soft routes, firewalls and other network applications
- Compatibility: No pre-installed operating system. All hardware has been tested with OPNsense, untangle, Windows, Proxmox and other popular open source software solutions
Rank #4
- FANLESS COOLING: No fan. Since heat is conducted through the casing, it is normal for the casing to become hot to the touch. Quiet, Dust-Proof.
- PROCESSOR: Equipped with an Intel N150 CPU (Beat N100), up to 3.6GHz, 4Cores 4threads 6 MB Intel@ Smart Cache, TDP 6w, supports AES-NI.
- OS: It tested with pf-sens/ opn-sense/ linux/ ubuntu/ and other popular open source OS.
- HIGH-PERFORMANCE NETWORK: 4x Intel i226 2.5-Gigabit Ethernet ports and 2x SFP+ ports with transfer speeds of up to 10 Gbps.
- NOTE: For SFP+ ports, you must provide your own modules and compatible network cables.
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