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Text Encryption

Text encryption can be useful for different purposes. There's the "easy hiding" of spoilers (e.g. using Caesar-Chiffre aka "ROT-13", also used with Geo-Caching), or Morse-Codes. And there are more serious things like safe-guarding sensitive information with real encryption. For all this, you can find matching Android apps:

Caesar-Cipher

2021-04-13

Caesar-Cipher is also known as "ROT" (from "rotate"), as the algorithm rotates the letters of the alphabet (e.g. 13 times with ROT-13), which is easily revertable. Caesar is said having used this to encrypt military correspondence, hence the name.

Morse Code

Morse code was used for telegraphy long ago. But it's still active in seafaring today (often as light signals), its best known example probably being the SOS distress signal.

Morse Tutors

2021-04-13

General Morse apps

2021-04-13

Morse Keyboards

2021-04-14

Multiple text-encryption methods

2021-04-14

Text encryption with PGP

2021-04-14

Encryption with AES/DES

2021-04-14

Various other encryption apps

2021-04-14

Further Readings:

2021-04-14