decoder rings
Cipher jewelry toys
Decoder rings are novelty toys, originally cereal box premiums, that use simple cipher wheels to encode and decode secret messages.
The ring contains rotating discs with letters or numbers that align to reveal hidden text.
Once beloved props of 1930s–50s radio serials, they now evoke nostalgia for childhood mysteries and secret clubs: We used our decoder rings to pass notes in class.
- codebookDocument listing codes' meanings
- cryptogramCoded message puzzle
- cipherHidden writing system
- secret messageCovert transmitted information
- encryptionConverting data into code
substitution · codebreaking · invisible ink · mystery solving · spy gadgets · escape rooms · keys · Ovaltine · cryptanalysis · transposition · hidden meaning · enigmas · steganography · spycraft · secret writing · logic puzzles · secret society · secret handshake
- secret codescipher, password, passphrase, cipher key, ciphers
- spy gearspy gadgets, invisible ink, microfilm, silencers, bugs
decoder ringsplaintext
Unencoded readable information
public announcements · clear text · megaphones · bulletin boards · open letters
decoder, ring, decode, decoding, decoded, decodes, code, codes, coded