This advanced RSA cipher tool provides professional-grade encryption capabilities. Generate RSA key pairs, encrypt and decrypt messages, create digital signatures, and encrypt files with this comprehensive cryptographic tool. RSA (Rivest-Shamir-Adleman) is one of the first public-key cryptosystems and is widely used for secure data transmission.
Generate RSA keys, encrypt/decrypt text, create digital signatures, and encrypt files
RSA keys consist of a public key (e, n) for encryption and a private key (d, n) for decryption.
Drag & drop a file here or click to browse
Drag & drop an encrypted file here or click to browse
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RSA (Rivest-Shamir-Adleman) is one of the first public-key cryptosystems and is widely used for secure data transmission. It uses a pair of keys: a public key for encryption and a private key for decryption. The security of RSA relies on the practical difficulty of factoring the product of two large prime numbers.
For most applications, 2048-bit keys provide a good balance between security and performance. 1024-bit keys are considered the minimum for secure applications today, while 4096-bit keys offer maximum security but require more computational resources.
This tool implements the RSA algorithm correctly and runs entirely in your browser, meaning your data never leaves your computer. However, for highly sensitive information, we recommend using established cryptographic libraries and professional security tools.
Yes, this tool includes file encryption capabilities. However, note that RSA is typically used to encrypt symmetric keys rather than large files directly due to performance considerations. For large files, hybrid encryption (combining symmetric and asymmetric encryption) is more efficient.
Digital signatures provide authentication, integrity, and non-repudiation. They allow the recipient to verify that a message was created by a known sender and that it was not altered in transit. This is crucial for secure communications, software distribution, and legal documents.
To share encrypted messages, you need to exchange public keys. The sender uses the recipient's public key to encrypt the message, and only the recipient with the corresponding private key can decrypt it. Never share your private key.