GPG's vulnerability to quantum cryptography

[Robert J. Hansen]

> Quantum cryptography was only discussed relating either to asymmetric
> crypto, which AES isn't, or in relation to Grover's algorithm, which is
> used to brute-force an algo.

Peter is correct, but a little clarification may be in order.   
Grover's is not a brute-forcing algorithm: it's a search algorithm.   
To turn Grover's into a brute-forcer you treat the entire keyspace as  
an extremely large database and you're searching through it to find  
one particular entry -- the key.  If you get into more depth in  
quantum computation you'll see Grover's appear in lots of different  
contexts.  It's an important and fundamental algorithm that has  
applicability far beyond crypto.

Let me repeat: Peter is completely correct.  I just want to make sure  
people understand that although Grover's can be used to help  
brute-force a cipher, it is not itself a cryptographic algorithm.  :)