cipher

This understanding wisdom began to be written in ciphers and characters and letters bearing the forms of creatures.

Just then, an attendant to whom the Queen had whispered returned; and taking a small case from her hand, Anne produced a bracelet somewhat similar to the very one with which Francesca had parted, excepting that it had her cipher, surrounded by a wreath of fleurs-de-lis. "Louis, will you offer this to Mademoiselle Carrara?"

The message was written in a simple cipher. Anyone could figure it out.

a public-key cipher

The message is clearly a cipher, but I can't figure it out.

The probability is 1 in 1,000,000,000,000,000 — a number having five ciphers of zeros.

They say no girls in the cipher, so I rock solo

As the night seemed darker, cops is on a hunt / They interrupt your cipher, and crush your blunt

There he was a mere cipher.