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AES (Advanced Encryption Standard) is a symmetrical block-cipher algorithm with a 128-bit block size, and key sizes of 128, 192 or 256 bits.

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How secure is AES-256?

The cipher AES-256 is used among other places in SSL/TLS across the Internet. It's considered among the top ciphers. In theory it's not crackable since the combinations of keys are massive. …
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7 votes

How secure is AES-256?

Network Operations Division Cryptographic Requirements" includes AES256 under the section "The Long-lived Suite for Network Communication" which further states: Confidentiality must be provided by AES
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