From the course: CompTIA Security+ (SY0-601) Cert Prep: 3 Cryptography Design and Implementation
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3DES
- [Instructor] When researchers discovered a text on DES that rendered the decades old algorithm insecure security professionals face the dilemma. They had tons of old equipment designed to work with DES, but they weren't able to rely on that equipment security. While the government worked to adopt the new advanced encryption standard, which I'll cover in the next video, practical security professionals around the world discovered a work around by using the DES algorithm on the same text multiple times they could achieve greater security. Specifically, three rounds of DES encryption produces much stronger security than existed with standard DES. They called this approach triple DES, sometimes written as three DES. Here's how triple DES works. The person encrypting a message feeds it into the DES algorithm using the first DES key, K1. This produces ciphertext encrypted with a standard data encryption standard…
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