Is 3DES secure? What are the alternatives?
Triple DES (also known as 3DES, TDEA and sometimes DES EDE), is a block cipher put together by combining three DES operations in a row in a particular way. Designed to prolong the life of the DES block cipher once its 56-bit key was shown to be too short, it is now itself deprecated.
The triple DES algorithm has been deprecated by the NIST since 2017. In this video Graham explains the unusual story behind the creation of 3DES and what you can do to avoid using it.