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----
-title: The search for the perfect ed25519 key
-description: Here's how you can embed your name in an SSH key
-date: 2024-12-11
----
-
-# The search for the perfect ed25519 key
-
-Todo write intro to catch attention
-
-### Why care about an ed25519 key?
-
-Ed25519 is a cryptographic algorithm for generating
-a pair of keys, a public one that can be shared with anyone
-and a private one that is kept as a secret.
-
-### The ssh public key format
-
-If you have ever accessed a remote server it was most likely by
-ssh-ing into it.  
-You have also most likely had to copy paste something similar to this:
-
-```
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBSSj+yfJLWEb+Df4r4603TOFAUBREYS43qQB+c9i9UW
-```
-
-Let's break it down
-
-- The first part `ssh-ed25519` is the algorithm type, other common algorithms are `ssh-rsa` and `ssh-ecdsa`
-- The second part is a base64-encoded binary format consiting of
-  - the length of the algorithm string, for ed25519 it's always 11 (4 bytes long)
-  - the algorithm type, for ed25519 it's always `ssh-ed25519` in binary (11 bytes long)
-  - the length of the key, 32 bytes for ed25519 (4 bytes long)
-  - the actual ed25519 key (32 bytes long)
-
-### Embedding a word in base64
-
-Base64 is a widely used format for writing binary in a compact and human readable way,
-it uses A-Z, a-z, 0-9, '/' and '+' adding up to 64 unique characters.
-
-It's possible to choose specific bytes in a way that when encoding it with base64
-it will form a word.
-
-For example, to encode "Kyren" in base64, we can use the following bytes  
-`00101011 00101010 01001110` or in hex `2b 2a de`