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by lucb1e 1206 days ago
Ah, I had looked for zero, null, and 000 in the DES Wikipedia article but it wasn't mentioned. Didn't think to search for a dedicated article. Thanks!

Saving others a click:

> DES has a few specific keys termed "weak keys" and "semi-weak keys". These are keys that cause the encryption mode of DES to act identically to the decryption mode of DES