07-01-2014, 09:50 PM
Jmking is correct. The message, based on the inclusion of numbers and letters is consistent with base 64. The result is probably a number that was encoded with ASCII or UTF-8.
However since you mentioned a private key I assume that means there's a public key too. For RSA this would be hard to determine for large numbers but we could probably brute force it. As for jmking's point about how the messsage was split, we would need to know the padding scheme (maybe it's a well known implementation)
However since you mentioned a private key I assume that means there's a public key too. For RSA this would be hard to determine for large numbers but we could probably brute force it. As for jmking's point about how the messsage was split, we would need to know the padding scheme (maybe it's a well known implementation)