diff -ru gopher2_3.old/gopherd/authenticate.c gopher2_3/gopherd/authenticate.c
--- gopher2_3.old/gopherd/authenticate.c        Sat Aug 12 16:34:47 2000
+++ gopher2_3/gopherd/authenticate.c    Sat Aug 12 16:51:51 2000
@@ -494,11 +494,12 @@
      char          keystr[256];
      char         *cp;
      Desnum        c;
-     int i;
+     int i, keysize;

-     strcpy(keystr, user);
-     strcat(keystr, ip);
-     strcat(keystr, key);
+     keysize = sizeof(keystr)-1, memset(keystr, 0, keysize+1);
+     strncat(keystr, user, keysize), i = keysize - strlen(keystr);
+     strncat(keystr, ip, i), i = keysize - strlen(keystr);
+     strncat(keystr, key, i);

      Debug("Encoding key %s\n", keystr);