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While 3DES fixed the security issues of its predecessor, it introduced a new problem: performance. Because it runs the DES algorithm three times, it is significantly slower than more modern ciphers. Furthermore, its 64-bit block size eventually became a liability against certain types of cryptanalysis (such as "Sweet32" attacks).

This approach effectively increases the key length to 168 bits (or 112 bits in some implementations), significantly raising the barrier for brute-force attacks. 3DES provided a much-needed security boost and allowed legacy systems to remain relevant for a longer period.

To address the vulnerabilities of DES without completely discarding its proven architecture, the industry introduced Triple DES (3DES). Instead of creating a new algorithm from scratch, 3DES applies the DES cipher three times to each data block. It typically uses three 56-bit keys (K1, K2, and K3) in an encrypt-decrypt-encrypt (EDE) sequence.

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Azmath - Des And 3des Вђ“

While 3DES fixed the security issues of its predecessor, it introduced a new problem: performance. Because it runs the DES algorithm three times, it is significantly slower than more modern ciphers. Furthermore, its 64-bit block size eventually became a liability against certain types of cryptanalysis (such as "Sweet32" attacks).

This approach effectively increases the key length to 168 bits (or 112 bits in some implementations), significantly raising the barrier for brute-force attacks. 3DES provided a much-needed security boost and allowed legacy systems to remain relevant for a longer period. DES and 3DES – AZMATH

To address the vulnerabilities of DES without completely discarding its proven architecture, the industry introduced Triple DES (3DES). Instead of creating a new algorithm from scratch, 3DES applies the DES cipher three times to each data block. It typically uses three 56-bit keys (K1, K2, and K3) in an encrypt-decrypt-encrypt (EDE) sequence. While 3DES fixed the security issues of its