The problem with clientside crypto (besides the security) is what do you do with it in the backend? Without matching code to decrypt on the backend it's pretty

The problem with clientside crypto (besides the security) is what do you do with it in the backend? Without matching code to decrypt on the backend it's pretty useless - unless you're using node, rhino or something. Porting javascript to another language is a pain because of the way javascript handles the long integers generated by these kinds of algorithms.