1. In a cryptographic manner

See also: cryptographic

• coal gas
• coal house
• coal industry
• coal mine
• coal miner
• coal miner's lung
• coal oil
• coal scuttle
• coal seam
• coal shovel
• coal tar
• coal tongs
• coal-black
• coal-burning
• coal-fired
• coal-tar creosote
• coalbin
• coaler
• coalesce
• coalesced
• coalescence
• coalescency
• coalescent
• coalescing
• coalface