RSA Encryption/Decryption Online
Online RSA encryption and decryption tool. Support 512/1024/2048/4096-bit keys, PKCS1/OAEP/NONE padding, PEM/HEX formats. Professional cryptography calculator.
Key Pair Management
RSA Encryption/Decryption
Most commonly used padding mode, suitable for most scenarios
RSA Signature/Verification
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.
Public Key Encryption, Private Key Decryption
This is the most fundamental use of RSA. The sender encrypts data with the receiver's public key, and only the receiver holding the corresponding private key can decrypt it. This ensures confidentiality.
Private Key Signing, Public Key Verification
The sender signs data with their own private key, and anyone with the public key can verify the signature's authenticity. This ensures sender reliability and data integrity.
Fully Localized Processing
For your data and privacy security, all calculations (including key generation, encryption, decryption, signing, and verification) are performed locally in your browser. No data is sent to the server.
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