anchor.diff:  
   -type legacy_hash()             :: md5.
   
  --type sign_algo()               :: rsa | dsa | ecdsa.
  +-type sign_algo()               :: rsa | dsa | ecdsa. % exported
  +
   -type kex_algo()                :: rsa |
                                      dhe_rsa | dhe_dss |
                                      ecdhe_ecdsa | ecdh_ecdsa | ecdh_rsa |
  
positive.code:               session_id/0,
                error_alert/0,
                tls_alert/0,
                srp_param_type/0]).
  
  %% -------------------------------------------------------------------------------------------------------
  
  
negative.code:                                  sect163r2 |
                                   secp160k1 |
                                   secp160r1 |
                                   secp160r2. % exported
  
  -type srp_param_type()        :: srp_1024 |
                                   srp_1536 |
  