(Reuters) - Synchrony Financial said on Monday its has joined R3, a group of companies working on blockchain technology, making it the first credit-card issuer to join the consortium.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=T75MZFczdhg:ttUu3WwNFEk:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=T75MZFczdhg:ttUu3WwNFEk:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=T75MZFczdhg:ttUu3WwNFEk:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=T75MZFczdhg:ttUu3WwNFEk:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=T75MZFczdhg:ttUu3WwNFEk:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/T75MZFczdhg" height="1" width="1" alt="" />