Cipher runes - Wikipedia

The Rök runestone, Sweden, features 'tent runes' in its uppermost row. Centered in the bottom row is a hook rune. Cipher runes, or cryptic runes, are the cryptographical replacement of the letters of the runic alphabet. Preservation[edit] The knowledge of cipher runes was best preserved in Iceland, and during the 17th–18th centuries, Icelandic scholars produced several treatises on the subject. Th

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暗号ルーン文字。