✍️ Digital Signature Maker
Create secure digital signatures for your documents and text. Generate cryptographically secure e-signatures with verification.
🔒 How Digital Signatures Work
⚡ Technical Process
1Hash Generation: Text is hashed using SHA-256 algorithm
2Key Generation: RSA key pair (2048-bit) is generated
3Signature Creation: Hash is encrypted with private key using RSA-SSA PKCS1 v1.5
4Encoding: Result is Base64 encoded for transmission
🔍 Why Hash is Used?
Yes, digital signatures are created from hashes! The original text is first converted to a SHA-256 hash, then this hash is encrypted with the private key.
- Fixed size: Always 256 bits regardless of text length
- Secure: Impossible to reverse the hash to get original text
- Efficient: Only hash is encrypted, not the entire document
- Tamper-proof: Any change in text creates a completely different hash
A digital signature is a cryptographic technique that provides:
- ✅ Authentication: Verifies the identity of the signer using cryptographic proof
- ✅ Integrity: Ensures the content hasn't been tampered with - any change invalidates the signature
- ✅ Non-repudiation: Prevents the signer from denying they signed it - legally binding
Note: This tool generates signatures for demonstration purposes. For legal documents, use certified digital signature services with proper key management.