Resources

http://etutorials.org/Linux+systems/unix+internet+security/Part+II+Security+Building+Blocks/Chapter+7.+Cryptography+Basics/7.2+Symmetric+Key+Algorithms/

http://etutorials.org/Linux+systems/unix+internet+security/Part+II+Security+Building+Blocks/Chapter+7.+Cryptography+Basics/7.4+Message+Digest+Functions/

https://www.password-depot.com/know-how/blowfish_and_rijndael.htm

https://golang.org/pkg/crypto/cipher/#BlockMode

https://asecuritysite.com/encryption/padding

https://crypto.stackexchange.com/questions/5333/difference-between-stream-cipher-and-block-cipher

https://www.socketloop.com/tutorials/golang-example-for-dsa-functions