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The term 'cipher' is a form of address used by certain members of the First Civilization to identify individuals integral to their plans. The term was used by Juno to address the Helix initiate, and by Jupiter to address Desmond Miles while he was in the Synch Nexus.
The First Civilization typically contact ciphers through the genetic memories of deceased individuals they view, such as those of Ezio Auditore da Firenze, Lydia Frye, though the 6th century Irish Celtic monk Brendan of Clonfert experienced visions due to his nature as a Sage where he was referred to as a cipher.
- 'Cipher' has a number of self-conflicting meanings; it is sometimes used to describe something as having no value, influence, or importance. Other times, it refers to a secret method of writing, as by transposition or substitution of letters.