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encrypt 

        # OpenSSL::PKey::PKey.encrypt

(from ruby core)
### Implementation from PKey
---
    pkey.encrypt(data [, options]) -> string

---

Performs a public key encryption operation using `pkey`.

See #decrypt for the reverse operation.

Added in version 3.0. See also the man page EVP_PKEY_encrypt(3).

`data`
:   A String to be encrypted.
`options`
:   A Hash that contains algorithm specific control operations to
    OpenSSL. See OpenSSL's man page EVP_PKEY_CTX_ctrl_str(3) for
    details.


Example:
    pkey = OpenSSL::PKey.generate_key("RSA", rsa_keygen_bits: 2048)
    data = "secret data"
    encrypted = pkey.encrypt(data, rsa_padding_mode: "oaep")
    decrypted = pkey.decrypt(data, rsa_padding_mode: "oaep")
    p decrypted #=> "secret data"

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