Transitioning the Use of Cryptographic Algorithms and Key Lengths

Re:Transitioning the Use of Cryptographic Algorithms and Key... by PeterWhittaker on Tuesday October 22, 2024 @12:12PM (#41915787)

I'm surprised to see symmetric algorithms in this list. It's been a while since I worked adjacent to the field (I'm not a cryptographer but spent a lot of time working with them in a past life), but my understanding is that PQ refers to replacing those algorithms that are vulnerable to advances in quantum computing, e.g., public key algorithms, such as RSA, that use relative primes and are therefore subject to attack by efficient implementations of Shor's algorithm.

AIUI, symmetric algorithms such as 3DES are not subject to these attacks, but my understanding could be wrong.

Care to enlighten?

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Re:Transitioning the Use of Cryptographic Algorithms and Key... by tptacek on Tuesday October 22, 2024 @01:32PM (#41916592)

Both ECB and TDEA are dangerously outmoded even if quantum cryptanalysis is never realized; ECB because you can see penguins through it, and TDEA because of the 8 byte block size.

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Re:Transitioning the Use of Cryptographic Algorithms and Key... by PeterWhittaker on Tuesday October 22, 2024 @01:56PM (#41916868)

Ah, OK, thanks. So part of the broader efforts to modernize, not in response to PQ threats.

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