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Blockchain Authentication Definition

KZero Staff
Jul 27, 2023

What is Blockchain Authentication?

Applications authenticate users’ identities in various ways. Some of the most common include passwords and biometrics, such as fingerprint or facial recognition.

Blockchain authentication refers to the use of blockchain technology to authenticate a user’s identity. If a person can prove that they are the owner of a particular blockchain account, they are authenticated to the associated account with the application or service.

How Blockchains Handle Authentication

Blockchains use asymmetric or public key cryptography to authenticate the owner of a particular blockchain account. With public key cryptography, a user generates a random private key and then derives a public key from this private key. The private key is used for decrypting data and generating digital signatures, while the public key is used for data encryption and signature verification.

On the blockchain, a user’s account address is derived from their public key. For example, addresses on the Ethereum blockchain are derived by taking a Keccak-256 hash of the public key and truncating it to its last 20 bytes.

One of the main advantages of this approach is that it creates a clear tie between a public key and the associated blockchain address. Every transaction on the blockchain includes a digital signature, which can be verified using the associated public key and used to prove that the owner of the account (or someone with access to their private key) created or approved the transaction.

This design solves one of the main challenges of public key cryptography: proving that a particular public key actually belongs to its alleged owner. Traditional public key infrastructure (PKI) systems involve chains of trust in which the authenticity of each public key is verified by the next party up the chain. With blockchain, public keys are inherently tied to accounts because anyone can derive the address associated with a public key from the key itself.

Using Blockchains for Authentication

Blockchain technology has a built-in method for performing strong user authentication. Users prove their identities by generating digital signatures that can be verified using the public key tied to a particular blockchain account. If a transaction — or other piece of data — is digitally signed, it was created by someone who knows the private key for that account.

Other applications can use blockchains’ authentication mechanisms to verify the identity of their users. During the account setup process, a user could prove that they own a particular blockchain account by digitally signing some data with the private key associated with that account. After the signature has been validated, the user’s account with a service is tied to that blockchain account.

If a user wanted to log into the service in the future, all they would have to do is generate another digital signature for that blockchain account. If they can do so, they know the private key associated with the account and are likely the authorized user.

Benefits of Blockchain Authentication

Using blockchain accounts for identity verification provides an alternative to traditional authentication systems. Some of the advantages of blockchain authentication include:

  • Stronger Security: Blockchain accounts use private keys rather than passwords to identify users. These keys are longer and more random, reducing the risk of weak passwords.
  • Existing Infrastructure: Blockchain technology has built-in identity management solutions. An application just needs to be able to verify digital signatures to authenticate a user’s identity.
  • Anonymous Identification: Blockchain authentication proves that a user is the owner of a blockchain account. This enables an application to authenticate a user’s identity without the need to know their real-world identity.
  • Ecosystem Integration: Blockchain technology is growing rapidly, and many solutions are being built on blockchain platforms. Using blockchain wallets for authentication makes it easier for an application to integrate with these blockchain-based solutions.

Conclusion

Blockchain authentication takes advantage of existing authentication infrastructure in blockchain technology to validate users’ identities for other applications. This approach to authentication offers strong user authentication and the potential for integration with other blockchain-based solutions.

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AAA Cyber Security Definition Access Control List Definition Account Sharing Definition Active Directory Certificate Services Definition Active Directory Federation Services Definition Adaptive Authentication Definition Advanced Encryption Standard (AES) Advanced Persistent Threat (APT) Definition Adware Definition AiTM Definition Altcoins API Definition ARP Cache Poisoning Attack Definition Asymmetric Encryption Definition Attack Surface Analysis Definition Attack Vectors Definition Authentication Authentication Protocols Definition Automated Compliance Definition
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CA Certs Definition Canary Cyber Security Definition Catfishing Definition Central Logging Definition Certificate Authority Definition Challenge handshake authentication protocol CHAP Authentication Definition CIA Triad Definition Cipher Definition Cipher Suite Definition Ciphertext Definition CIS Click Fraud Definition Cloud Data Security Definition Cloud Security Risks Definition Computer Viruses Definition Continuous Authentication Definition Corporate Account Takeover Definition Credential Stuffing Definition Cross-site Scripting Definition CRUD Definition Crypto Cryptographic Hash Definition Cryptojacking Definition Cyber insurance Cyber Kill Chain Definition Cybersecurity Cybersecurity Analytics Definition Cybersecurity Honeypot Definition Cyberwarfare Definition
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Elliptic Curve Digital Signature Algorithm (ECDSA) Definition Email Hijacking Definition Encryption Definition Endpoint Detection and Response (EDR) Definition Endpoint Management Definition Endpoint Security Definition Equifax Security Breach Ethereum Ethernet Switch Definition Extensible Authentication Protocol (EAP) Method Definition Eye Authentication
Face Authentication Facial Recognition Definition Fake Hacking Definition Fault Tolerance Definition Federated Authentication Definition FIDO Alliance FIDO Biometrics FIDO Client Software SDK FIDO Cloud Authentication FIDO IoT Security FIDO Server FIDO U2F Authentication FIDO UAF Fido2 Definition Fileless Malware Definition Fingerprint Biometrics Definition Firewall Definition Firewall Rule Definition Firmware Definition Forensic Analysis Definition
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Network Edge Definition Network Security Definition Node NTLM Authentication NTLM Authentication Definition NTLM Definition
OAuth 2.0 Definition OAuth Definition OCSP Definition On-Path Attack Definition One-Factor Authentication Definition One-Time Password Definition Open banking OpenID Connect Flow Definition OPSEC Definition OTP Definition Out-of-band authentication
PAM Tools Definition Parse Logs Definition Passkeys Password Complexity Password Hashing Password Reuse Password Spraying Definition Passwordless Authentication Penetration Testing Definition Personally identifiable information (PII) PGP Definition Phishing Definition PKI Architecture Definition PKI Authentication Definition PKI Certificates Definition Port Scanning Definition Pretexting Definition Privileged Access Management Definition Protected health information (PHI) Proxy Server Definition PSD1 Definition PSD2 Definition Public Key Encryption Definition Push Authentication
QoS Definition QR Code Authentication Quantum Computing Quantum Cryptography Quantum Encryption
RADIUS Protocol Definition Rainbow Table Random Number Generator Ransomware Red Team Remote Access Trojan Definition REST API Definition REST Protocols Definition Reverse Engineering Risk-Based Authentication Rootkit Definition
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Tailgating Attack Thin Client Definition Threat Actor Threat Hunting Threat Intelligence Threat Modeling Ticket-Granting Ticket (TGT) Definition Tiny Banker Trojan Tokenization Definition Tokenized Authentication TOTP Definition Traceroute Definition Transmission Control Protocol (TCP) Definition Transparent Proxy Trickbot Trojan horse Trojan Virus Definition Trustless Two-factor authentication
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