Examples include : Early versions of ORGANIZATION@1 's PPTP virtual private network software used the same RC4 key for the sender and the receiver -LRB- later versions had other problems -RRB- .

Examples include : Early versions of ORGANIZATION@1 's PPTP virtual private network software used the same RC4 key for the sender and the receiver -LRB- later versions solved this problem but may still have other problems -RRB- .
