Why some people said we should use Asymmetric key to cipher the weak Symmetric key?

NickRar

7/21/23, 2:40 AM

I heard from some people that create a software licensing. They need to generate a short license number format. So if they use RSA (Asymmetric) they will got long key. Also if they use AES (Symmetric). It have only single key. Which can decrypted by attacker and he use it to generate/create KeyGens tool.

So I heard from one of them he said he use Asymmetric to secure the Symmetric Key.... I know what he mean. But in application I think RSA public key will stored. so the symmetric key will be known when decrypt the Symmetric Key variable which maybe saved in resources or something.

I think this is not give more secure to symmetric key. after it decrypted with public key (RSA), Attacker will generate keygens easily. So what the benefits of doing that? Or what they actually try to do with this idea?

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rsa

encryption

aes

public-key

symmetric

fgrieu

7/21/23, 6:36 AM

In most contexts, "decrypted with public key" is a confusion. A public key is not intended to be used to decrypt (because it's public, thus using it in this way goes against the goal of keeping what's encrypted secret). A public key is intended to encrypt something (that will be decrypted with a matching private key), or to verify a signature (that was produced using a matching private key). Perhaps "use Asymmetric to secure the Symmetric Key" means _signing_ the symmetric secret key. Or perhaps it really means _encrypting_; that would be security by obscurity (common in software licensing).

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Why some people said we should use Asymmetric key to cipher the weak Symmetric key?

TH: ทำไมบางคนถึงบอกว่าเราควรใช้คีย์อสมมาตรเพื่อเข้ารหัสคีย์สมมาตรที่อ่อนแอ

RO: De ce unii oameni au spus că ar trebui să folosim cheia asimetrică pentru a cifra cheia simetrică slabă?

RU: Почему некоторые люди говорят, что мы должны использовать асимметричный ключ для шифрования слабого симметричного ключа?

VI: Tại sao một số người nói rằng chúng ta nên sử dụng khóa Bất đối xứng để mã hóa khóa Đối xứng yếu?

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