Does anyone know the rate at which password-cracking methods are improving? Specifically: what is the doubling time?
Also: the process is probably best expressed as keys cracked per second per $1,000 investment, or $1/(key-second). It's not a flat rate, it's a cost-dependent rate for a given point in time.
Quick maths suggests that if the rate-doubling time is 2 years, and a current key is rated at 1 trillion years, *ACTUAL* effective strength is less than 70 years.
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