Shafra

shafra [shaf-ra] /ʃafˈrɑ/
 noun (Arabic: شَفرة) 
a. Cryptography: A method of transforming information or data into a secret code or cipher to prevent unauthorized access or reading; encryption. b. Code: An organized system of symbols, letters, or words given certain arbitrary meanings, used for transmitting messages requiring secrecy or brevity. c. Metaphorical Key: An insight, piece of information, or idea that provides a crucial understanding or solution, especially one that reveals the hidden or obscured meaning of a complex issue or problem.