[Security] CRLF(Carriage Return Line Feed)

□ CRLF(Carriage Return Line Feed)

○ Carriage : Paper control device of Printing device(Printer, Teletypewriter)
○ Carriage Return

- (In printing device) Phenomenon that Paper control device is returned to the initial state(In general, the left end)
- (In PC) Phenomenon that cursor is moved to beginning  of the line

○ Line Feed

- (In printing device) Phenomenon that paper controller move down print position one line
- (In PC) Phenomenon that cursor is moved to one line down

○ Carriage Return Line Feed

- To move the cursor to the beginning of the line and below the line
- In general, LF contains CR
- Because some systems(Teletypewriter etc.) doesn't include CR at LF, expression CRLF's meaning is more clear than LF

○ ASCII CODE : CR(\r) / LF(\n)