The first rule of security, the mechanism for your security/encryption should be able to fall into enemy hands without compromising said security.
Several years after the theft of source code for several of its security products, Symantec has recommended that users of pcAnywhere, which allows users to remotely connect to another computer, disable the software until further notice.
via Symantec warns users to disable pcAnywhere in wake of source code theft | The Verge.