Words to Describe cryptosystem

How cryptosystem often is described ("________ cryptosystem")

• homomorphic
• secure
• private
• bit
• elliptic
• time
• conventional
• classical
• naval
• public
• fast
• based
• known
• symmetric
• nice
• practical
• basic
• asymmetric
• key
• hybrid
• multiplicative
• underlying
• secret
• efficient