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I've 8 bytes before encryption (for example: 01 02 03 04 05 06 07 08) and 8 bytes after DES encryption: 08 07 06 06 05 04 03 02 01. Is it possible to calculate the key?

Patriot
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barwnikk
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1 Answers1

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A single p3.16xlarge EC2 instance is capable of evaluating $369\times10^9 \approx 2^{38}$ DES calls per second using hashcat.

This puts the maximum time to recover a key at around $2^{56} / 369\times10^9 / 3600 \approx 54$ hours. This costs a little over $1300 at current pricings.

Samuel Neves
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