Aside from developer certifications that include coverage of security topics and passing coverage in general security certifications like CISSP, Security+ and so forth (which means usually only one knowledge domain out of 7 or more such domains relates to your primary area of interest), I'm not aware of any security certifications that aim specifically at developers.
At present, this kind of knowledge is probably easiest to gain by pursuing a master's degree with a specific focus on that topic. At the same time, I would suggest that you consider obtaining Security+, CISSP and perhaps some vendor security certifications like those from Cisco, CheckPoint, RSA, IBM and so forth, to give you a market perspective on what security looks like from a more standard point of view.
Good luck in your pursuit of this entirely laudable subject matter.
For more information on this topic, visit these other SearchSecurity.com resources:
Careers and Certification Tip: The vendor-neutral security certification landscape
Careers and Certification Tip: Survey of vendor-specific security certs
Ask the Expert: Best graduate schools for network security
This was first published in January 2003