共きょう通つう鍵かぎ暗あん号ごうきょうつうかぎあんごうMeanings1nounsymmetric key cryptographycomputingTechnical term in computing; refers to encryption where the same key is used for both encryption and decryption.共きょう通つう鍵かぎ暗あん号ごうでは、送そう信しん者しゃと受じゅ信しん者しゃが同おなじ鍵かぎを共きょう有ゆうする必ひつ要ようがある。In symmetric key cryptography, the sender and receiver need to share the same key.