You can configure OpenSSL so as not to use RC5 and IDEA by using
./config no-rc5 no-idea
-Until the RSA patent expires, U.S. users may want to use
- ./config no-rc5 no-idea no-rsa
-
-Please note that you will *not* be able to communicate with most of
-the popular web browsers without RSA support.
-
* Is OpenSSL thread-safe?