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I've written a DES implementation as an exercice and am now wondering if and where (triple-)DES is used today.
I've read about banking cards using it, but I can't find any reliable source for it.
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The Triple Data Encryption Algorithm (TDEA or 3DES) is being officially decommissioned, according to draught guidelines provided by NIST on July 19, 2018. According to the standards, 3DES will be deprecated for all new applications following a period of public deliberation, and its use will be prohibited after 2023.
How is DES used today? As deprecated standards, both the DES and 3DES algorithms and key lengths could still be used. However, users must accept that there is a security risk in using the deprecated algorithm and key length and that the risk will increase over time.
Data Encryption Standard (DES) Published as the Federal Information Processing Standards (FIPS) 46 standard in 1977, DES was officially withdrawn in 2005.
The Advanced Encryption Standard (AES) was introduced in 2001 to replace 3DES.
Triple-DES is still in use today but is widely considered a legacy encryption algorithm. DES is inherently insecure, while Triple-DES has much better security characteristics but is still considered problematic.
NIST is the government organization that standardizes on cryptographic algorithms. The most current symmetric-key encryption algorithm NIST standard is AES, the Advanced Encryption Standard. In fact, there were a number of good nominations to be NIST's AES, including the Rijndael algorithm which became AES, as well as Bruce Schneier's Blowfish, the Twofish algorithm, and the Serpent algorithm.
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