AES (Advanced Encryption Standard )

 128 bits/Strongest

 Also known as Rijndael. This cipher is used for encryption by default.

 Ideal for both domestic and exportable use.

 Serpent

 128, 192 or 256 / very strong / fast

 128, 192, 256-bit block cipher. Designed by Ross Anderson, Eli Biham and Lars Knudsen as a candidate for the Advanced Encryption Standard.

 Ideal for both domestic and exportable use.

 3DES

 168 bits/strong/Slow

 Applies Data Encryption Standard (DES) cipher three consecutive times to the message to form the message digest. Offers protection against meet-in-the-middle attacks.

 Suitable for domestic use.

 XOR

 Variable block size /very weak / very fast

 160 bit key. XOR encryption is a trivially simple symmetric cipher which is used in many applications where security is not a defined requirement

 Not recommended

 Blowfish

 64-bit block / variable key length: 32 bits to 448 bits/strong/fast

 Symmetric block cipher. It is a Feistel network, iterating a simple encryption function 16 times. The block size is 64 bits, and the key can be any length up to 448 bits. Designed by Bruce Schneier.

 Ideal for both domestic and exportable use. Much faster than DES and IDEA.

 Twofish

 128-bit block/ 28-, 192-, or 256-bit key/ strong/ very fast

 Symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits.

 A widely used and recommended choice for most cases.