Simplify the following text for a Grade 11 native English-speaking person.
Original: In cryptography , Blowfish is a keyed , symmetric block cipher , made in 1993 by Bruce Schneier and since 1993 has been included ( put together ) in a large number of encryption products .
Simplified: Blowfish is a keyed , symmetric block cipher , designed in 1993 by Bruce Schneier and included in a large number of cipher suites and encryption products .