LOCATION@1 has brute-forced RC5 messages encrypted with NUMBER@1 - and 64-bit keys , and is working on cracking a 72-bit key ; as of August NUMBER@2 NUMBER@3 % of the keyspace have been searched .

LOCATION@1 has brute-forced RC5 messages encrypted with NUMBER@1 - and 64-bit keys , and now is working on cracking a 72-bit key .
