simple: Anonymous Public-key Encryption (Sealed Box)

In sodium: A Modern and Easy-to-Use Crypto Library

Anonymous Public-key Encryption (Sealed Box)

Description

Create an encrypted message (sealed box) from a curve25519 public key.

Usage

simple_encrypt(msg, pubkey)

simple_decrypt(bin, key)

Arguments

msg	message to be encrypted
pubkey	public key of the receiver
bin	encrypted ciphertext
key	private key of the receiver

Details

Simple public key encryption allows for sending anonymous encrypted messages to a recipient given its public key. Only the recipient can decrypt these messages, using its private key.

While the recipient can verify the integrity of the message, it cannot verify the identity of the sender. For sending authenticated encrypted messages, use auth_encrypt and auth_decrypt.

References

https://doc.libsodium.org/public-key_cryptography/sealed_boxes.html

Examples

# Generate keypair
key <- keygen()
pub <- pubkey(key)

# Encrypt message with pubkey
msg <- serialize(iris, NULL)
ciphertext <- simple_encrypt(msg, pub)

# Decrypt message with private key
out <- simple_decrypt(ciphertext, key)
stopifnot(identical(out, msg))

sodium documentation built on Oct. 4, 2024, 5:08 p.m.