Public key distribution problem¶

The Public key distribution problem arises in the context of verifying Digital signatures and ensuring secure communication.^[600-developer-tools-security-openssl.md]

In cryptographic systems, a Digital Signature serves to prove that a specific input message originated from the owner of a [[private key]].^[600-developer-tools-security-openssl.md] Verification of this signature relies on the use of the corresponding [[public key]].^[600-developer-tools-security-openssl.md]

The fundamental challenge is that public keys are typically acquired over a network.^[600-developer-tools-security-openssl.md] This creates a security risk: there is no inherent way to prove that the obtained public key is authentic or correct.^[600-developer-tools-security-openssl.md] This vulnerability facilitates the potential for [[Man-in-the-middle attacks]], where an attacker could substitute a legitimate public key with their own.

The industry-standard solution to this problem is the introduction of a [[Certificate Authority|CA (Certificate Authority)]].^[600-developer-tools-security-openssl.md]

Sources¶

• 600-developer-tools-security-openssl.md