AES-256

AES-256 provides the highest level of symmetric encryption with a 256-bit key and 14 rounds of processing. It meets the requirements for TOP SECRET classification by intelligence agencies and is used in government-grade NFC applications, electronic passports, and secure element implementations. The additional security margin comes at a slight performance cost compared to AES-128.

AES-256 | 256-bit คีย์ | สมมาตร

ช่องโหว่ที่ทราบ

Maximum security for symmetric encryption. No known practical attacks. Used in government and military applications. Provides sufficient security margin against potential quantum computing threats (Grover's algorithm reduces effective strength to 128 bits).