[morningseagulls]

>Do you write your own crypto libraries too?

Some people do. It's a good challenge.[0]

[0] https://cryptopals.com/

[dahart]

To be fair, the main thing you learn doing the cryptopals challenge is to not write your own crypto.

I had a lesson in writing crypto once, when I made what I thought was a good enough secret mixing procedure to encode some data I wanted to email outside of a company that didn’t allow web access. (Long time ago, circa 2000). It all looked undecipherable and I sent most of the data before I discovered that strings of binary zero were leaking my secret key. Oops, pretty stupid.

[morningseagulls]

>To be fair, the main thing you learn doing the cryptopals challenge is to not write your own crypto.

D'oh! Good point though lol.

[detaro]

But the OP clearly didn't ask about doing it as a challenge or to understand how it works (which is what cryptopals is about), but actual usage.

[morningseagulls]

>But the OP clearly didn't ask about doing it as a challenge or to understand how it works (which is what cryptopals is about), but actual usage.

But the parent of the comment I was replying to clearly had the former in mind, as a subsequent comment showed.[0]

[0] https://news.ycombinator.com/item?id=21240429