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by irundebian
3266 days ago
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The same logic would apply to an 8192 bit key. One more bit doubles the key space. Someone who is be able to crack 2048 bit keys, probably also has the opportunity to crack 4096 bit keys. It may not be cheap for your communication partners to use your 4096 bit key. Smartphones and embedded devices want to use as less energy as possible. With an 4096 bit key, you force your communication partners to spent an unnecessary amount of energy. |
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Yes, except that a 4096 bit key is not just "one more bit", it's double the amount of bits.
> Someone who is be able to crack 2048 bit keys, probably also has the opportunity to crack 4096 bit keys
No, it would require an impossibly large amount of effort to crack 4096 bit keys compared to 2048 bit keys.
> Smartphones and embedded devices want to use as less energy as possible
They can use ed25519 then.
> With an 4096 bit key, you force your communication partners to spent an unnecessary amount of energy.
They spend more energy by running ad-ridden "apps" and electron monstrosities.