加密

jiāmì
  1. to encrypt
  2. encryption
  3. to protect with a password

CEDICT

Entry Composition

1 加 jiā
  1. to add
  2. (math.) plus
  3. to increase; to augment
  4. (used before a disyllabic verb, often after an adverb like 不 bù, 大 dà, 稍 shāo etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良 shāojiāgǎiliáng "make some minor improvements to (it)")
2 密 mì
  1. dense; close; thick
  2. intimate; close
  3. (bound form) secret; confidential
  4. (Internet slang) to send a private message to (sb); to DM