Anonymous Public-key Encryption (Sealed Box)

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))