What are the best ciphers to use for security in 2020 and is it worth writing your own?

Question

Encryption

What are the best ciphers to use for security in 2020 and is it worth writing your own?
I would like to know which asymmetric and which symmetric cipher is better to use.
They say that RSA should not be used. Here is this individual: https://habr.com/ru/company/virgilsecurity/blog/459370/
Or is it still worth it?
What is the best symmetric cipher? Safer, etc.
Not very long messages need to be encrypted. From 10 to 2000 characters.
Should I write my own encryption algorithm? What books do you need to read to do this? Need to know math?

Answer 1

Latest iteration of a periodically updated list of current crypto by the Cryptopals team. Nothing has changed in almost 2 years.
Actually suggest to use NaCl/libsodium and not to wrinkle mosk. Asymmetry is there on Curve25519, symmetry is AES-256 in GCM or ChaCha20 mode.

Should I write my own encryption algorithm?

If you are asking this question, then the answer is immediately negative. Cryptography is one of the areas of knowledge in which until you learn 99% - there is no point in moving to practice, because. the result will be obviously full of holes.

Answer 2

Take your programming language and see the section on cryptography.
There will be recommended algorithms, key lengths, and even procedures to improve security.

Answer 3

XChaCha20-Poly1305 or XSalsa20-Poly1305
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