Conclusion

• Less security and patent problems in the future.

• My personal choice:

• If you need standard compatibility use: 64 bit: Triple - DES with 168 bit key 128 bit: Rijndael with 256 bit key

• I you want to build hardware take a look on Serpent.

• If you can do what you want: 64 bit: Blowfish with 256 bit key (or more!-) 128 bit: Twofish with 256 bit key