What are the differences between these encryption algorithms?

Question

What are the difference between MCRYPT_RIJNDAEL_128, MCRYPT_RIJNDAEL_256, MCRYPT_BLOWFISH, etc. Which one is best suitable for data trans

Answer 1

It depends on the kind of answer you want: Differences in implementation are a mere programming concern whilst differences in design are usually quite detailed mathematical proofs. Explaining the intricate design differences between several encryption algorithms is possibly beyond the scope of this site. In addition, every algorithm has weaknesses, some known, some not. Specific weaknesses in extant algorithms usually result in their retirement, but there can be ways to work around them (Classic example: DES had a subset of keys that resulted in easily crackable code. The workaround was to not use those keys.).