"AES 128 is the most widely used variety of the Advanced Encryption Standard, a block cipher suite formally adopted by NIST in 2001. With no known vulnerabilities in its 30-year history, a brute-force attack is the only known way to break it."
"Amateur cryptographers and mathematicians twisted a series of equations known as Grover's algorithm to declare the death of AES 128 once a cryptographically relevant quantum computer (CRQC) came into being."
"A CRQC would halve the effective strength to just 2 64, a small enough supply that-if true-would allow the same Bitcoin mining resources to brute force it in less than a second."
"Valsorda finally channelled years' worth of frustration fueled by the widely held misunderstanding into a blog post titled Quantum Computers Are Not a Threat to 128-bit Symmetric Keys."
AES 128, a widely used encryption standard, is secure in a post-quantum world. Despite claims that quantum computing could halve its strength, no vulnerabilities exist. Brute-force attacks remain impractical, taking billions of years even with significant computational resources. Misunderstandings about Grover's algorithm have led to fears about AES 128's effectiveness. Filippo Valsorda emphasizes that these fears are unfounded, and AES 128 continues to provide robust security.
Read at Ars Technica
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