back door

English Thesaurus

1. a secret or underhand means of access (to a place or a position) (noun.act)

hypernym	:	access,
definition	:	the act of approaching or entering (noun.act)

2. an entrance at the rear of a building (noun.artifact)

hypernym	:	exterior door, outside door,
definition	:	a doorway that allows entrance to or exit from a building (noun.artifact)

3. an undocumented way to get access to a computer system or the data it contains (noun.communication)

hypernym	:	access, access code,
definition	:	a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.) (noun.communication)