9 replies to this topic

[immibis]

This program attempts to decrypt English text encrypted by Malte's Easy Encryption API without knowing the key, only the key length.

The message must be much larger than the key (at least 20 times, maybe more) and must be English text - this probably won't work on Lua code, unless you change rateText. The running time is approximately O(size of key * size of message).

Download

Screenshots at different key lengths:













(the last ones show why I said the message must be many times the key length)

[theoriginalbit]

Haha nice work immibis!

[superaxander]

That looks very funny

[immibis]

Can't edit on my phone - but if you're referring to the last screenshots, that's why I said the message length must be many times the key length.

[Lyqyd]

This is not malicious. Not because the encryption API it targets isn't in wide use, but because all it attempts to do is decrypt a string of cyphertext. If it had other "features" like rednet sniffing, etc. then the tool would start running afoul of the malicious code rule.

[tesla1889]

could the full CC definition of malicious code be posted somewhere please?

[PixelToast]

now break mine!
http://www.computerc...ased-encryption

[tesla1889]

i dont suppose rainbow tables would be much use in CC

[bjornir90]

Looks funny

[Malte]

Wow... Time to make Version 2!