encryption

This class allows to sign, verify, encrypt and decrypt messages at all levels of escrow processing.

The algorithm includes the implementation of the PGP encryption algorithm multi-public key encryption on python. Using the vanilla ed25519 implementation Schnorr signatures for signature and curve25519 for encryption. Learn more.

Code Example

from human_protocol_sdk.encryption import Encryption

private_key = """-----BEGIN PGP PRIVATE KEY BLOCK-----

xVgEZJ1mYRYJKwYBBAHaRw8BAQdAGLLi15zjuVhD4eUOYR5v40kDyRb3nrkh
0tO5pPNXBIkAAQCXERVkGLDJadkZ3yzerGQeJyxM0Xl5IaEWrzQsSCt/mwz7
zRRIdW1hbiA8aHVtYW5AaG10LmFpPsKMBBAWCgA+BQJknWZhBAsJBwgJEAyX
rIbvfPxlAxUICgQWAAIBAhkBAhsDAh4BFiEEGWQNXhKpp2hxuxetDJeshu98
/GUAAFldAP4/HVRKEso+QiphYxfAIPbCbrZ+xy6RTFAW0tdjpDQwJQD+P81w
74pFhmBFjb8Aio87M1lLRzLSXjEVpKEciGerkQjHXQRknWZhEgorBgEEAZdV
AQUBAQdA+/XEHJiIC5GtJPxgybd2TyJe5kzTyh0+uzwAgD33R3cDAQgHAAD/
brJ3/2P+H4wOTV25YBp+UVvE0MqiVrCLk5kBNJdpN8AQn8J4BBgWCAAqBQJk
nWZhCRAMl6yG73z8ZQIbDBYhBBlkDV4SqadocbsXrQyXrIbvfPxlAAC04QD+
Jyyd/rDd4bEuAvsHFQHK2HMC2r0OLVHdMjygPELEA+sBANNtHfc60ts3++D7
dhjPN+xEYS1/BntokSSwC8mi56AJ
=GMlv
-----END PGP PRIVATE KEY BLOCK-----"""
passphrase = "passphrase"

encryption = Encryption(private_key, passphrase)

Module

class human_protocol_sdk.encryption.encryption.Encryption(private_key_armored, passphrase=None)

Bases: object

A class that provides encryption and decryption functionality using PGP (Pretty Good Privacy).

__init__(private_key_armored, passphrase=None)

Initializes an Encryption instance.

  • Parameters:

    • private_key_armored (str) – Armored representation of the private key

    • passphrase (Optional[str]) – Passphrase to unlock the private key. Defaults to None.

decrypt(message, public_key=None)

Decrypts a message using the private key.

  • Parameters:

    • message (str) – Armored message to decrypt

    • public_key (Optional[str]) – Armored public key used for signature verification. Defaults to None.

  • Return type: str

  • Returns: Decrypted message

  • Example:

    from human_protocol_sdk.encryption import Encryption

private_key = """-----BEGIN PGP PRIVATE KEY BLOCK-----
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=GMlv
-----END PGP PRIVATE KEY BLOCK-----"""

passphrase = "passphrase"

encryption = Encryption(private_key, passphrase)
decrypted_message = encryption.decrypt(encrypted_message)

sign(message)

Signs a message using the private key.

  • Parameters: message (str) – Message to sign

  • Return type: str

  • Returns: Armored and signed message

  • Example:

    from human_protocol_sdk.encryption import Encryption

private_key = """-----BEGIN PGP PRIVATE KEY BLOCK-----

xVgEZJ1mYRYJKwYBBAHaRw8BAQdAGLLi15zjuVhD4eUOYR5v40kDyRb3nrkh
0tO5pPNXBIkAAQCXERVkGLDJadkZ3yzerGQeJyxM0Xl5IaEWrzQsSCt/mwz7
zRRIdW1hbiA8aHVtYW5AaG10LmFpPsKMBBAWCgA+BQJknWZhBAsJBwgJEAyX
rIbvfPxlAxUICgQWAAIBAhkBAhsDAh4BFiEEGWQNXhKpp2hxuxetDJeshu98
/GUAAFldAP4/HVRKEso+QiphYxfAIPbCbrZ+xy6RTFAW0tdjpDQwJQD+P81w
74pFhmBFjb8Aio87M1lLRzLSXjEVpKEciGerkQjHXQRknWZhEgorBgEEAZdV
AQUBAQdA+/XEHJiIC5GtJPxgybd2TyJe5kzTyh0+uzwAgD33R3cDAQgHAAD/
brJ3/2P+H4wOTV25YBp+UVvE0MqiVrCLk5kBNJdpN8AQn8J4BBgWCAAqBQJk
nWZhCRAMl6yG73z8ZQIbDBYhBBlkDV4SqadocbsXrQyXrIbvfPxlAAC04QD+
Jyyd/rDd4bEuAvsHFQHK2HMC2r0OLVHdMjygPELEA+sBANNtHfc60ts3++D7
dhjPN+xEYS1/BntokSSwC8mi56AJ
=GMlv
-----END PGP PRIVATE KEY BLOCK-----"""

passphrase = "passphrase"

encryption = Encryption(private_key, passphrase)
signed_message = await encryption.sign("MESSAGE")

sign_and_encrypt(message, public_keys)

Signs and encrypts a message using the private key and recipient’s public keys.

  • Parameters:

    • message (str) – Message to sign and encrypt

    • public_keys (List[str]) – List of armored public keys of the recipients

  • Return type: str

  • Returns: Armored and signed/encrypted message

  • Example:

    from human_protocol_sdk.encryption import Encryption

private_key = """-----BEGIN PGP PRIVATE KEY BLOCK-----

xVgEZJ1mYRYJKwYBBAHaRw8BAQdAGLLi15zjuVhD4eUOYR5v40kDyRb3nrkh
0tO5pPNXBIkAAQCXERVkGLDJadkZ3yzerGQeJyxM0Xl5IaEWrzQsSCt/mwz7
zRRIdW1hbiA8aHVtYW5AaG10LmFpPsKMBBAWCgA+BQJknWZhBAsJBwgJEAyX
rIbvfPxlAxUICgQWAAIBAhkBAhsDAh4BFiEEGWQNXhKpp2hxuxetDJeshu98
/GUAAFldAP4/HVRKEso+QiphYxfAIPbCbrZ+xy6RTFAW0tdjpDQwJQD+P81w
74pFhmBFjb8Aio87M1lLRzLSXjEVpKEciGerkQjHXQRknWZhEgorBgEEAZdV
AQUBAQdA+/XEHJiIC5GtJPxgybd2TyJe5kzTyh0+uzwAgD33R3cDAQgHAAD/
brJ3/2P+H4wOTV25YBp+UVvE0MqiVrCLk5kBNJdpN8AQn8J4BBgWCAAqBQJk
nWZhCRAMl6yG73z8ZQIbDBYhBBlkDV4SqadocbsXrQyXrIbvfPxlAAC04QD+
Jyyd/rDd4bEuAvsHFQHK2HMC2r0OLVHdMjygPELEA+sBANNtHfc60ts3++D7
dhjPN+xEYS1/BntokSSwC8mi56AJ
=GMlv
-----END PGP PRIVATE KEY BLOCK-----"""

passphrase = "passphrase"

public_key2 = """-----BEGIN PGP PUBLIC KEY BLOCK-----
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=4PJh
-----END PGP PUBLIC KEY BLOCK-----"""

public_key3 = """-----BEGIN PGP PUBLIC KEY BLOCK-----
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=62qY
-----END PGP PUBLIC KEY BLOCK-----"""

encryption = Encryption(private_key, passphrase)
encrypted_message = encryption.sign_and_encrypt(
    "your message", [public_key2, public_key3]
)

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