RSA Encryption/Decryption Online

Online RSA encryption and decryption tool. Support 512/1024/2048/4096-bit keys, PKCS1/OAEP/PSS padding, PEM/HEX formats. Professional cryptography calculator.

Key Pair Management

Key Size:
Key Format:

RSA Encryption/Decryption

Padding Mode:

Most commonly used padding mode, suitable for most scenarios

Plaintext Format:
Ciphertext Format:

RSA Encryption Knowledge

What is RSA?

RSA is an asymmetric encryption algorithm using a key pair: public key for encryption and private key for decryption. Its security is based on the difficulty of factoring large numbers.

How it Works

Generates key pairs using the product of two large prime numbers, utilizing number theory concepts like Euler's function and modular arithmetic for encryption and decryption.

Key Length

Key length directly affects security. Currently,2048-bit or longer keys are recommended for adequate security.

Padding Schemes

Uses padding schemes (like OAEP) to enhance security and prevent various known attacks.

RSA Features

  • Asymmetric Encryption: Uses different keys for encryption and decryption
  • High Security: Based on mathematical problems, difficult to crack
  • Simple Key Management: Public key can be freely distributed
  • Digital Signatures: Can be used for authentication and integrity verification

Applications

  • Secure Communications: Protecting sensitive data transmission
  • Digital Certificates: Authentication in SSL/TLS protocols
  • Electronic Signatures: Ensuring document authenticity and integrity
  • Key Exchange: Securely transmitting symmetric encryption keys
  • Secure Email: Email encryption and authentication

Security Recommendations

  • Use sufficiently long keys (minimum 2048 bits)
  • Choose secure padding schemes (OAEP recommended)
  • Safeguard private keys against exposure
  • Regularly update key pairs
  • Use in conjunction with other security measures
The tools on this site are strictly prohibited for illegal purposes. We do not bear any losses and responsibilities caused by using the tools.
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