diff --git a/security/py-shamir-mnemonic/Makefile b/security/py-shamir-mnemonic/Makefile
new file mode 100644
index 000000000000..9b2efe4ab7a1
--- /dev/null
+++ b/security/py-shamir-mnemonic/Makefile
@@ -0,0 +1,22 @@
+PORTNAME=	shamir-mnemonic
+DISTVERSION=	0.3.0
+CATEGORIES=	security python
+MASTER_SITES=	PYPI
+PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+DISTNAME=	shamir_mnemonic-${DISTVERSION}
+
+MAINTAINER=	ehaupt@FreeBSD.org
+COMMENT=	Implementation of SLIP-0039 Shamir mnemonic secret sharing
+WWW=		https://pypi.org/project/shamir-mnemonic/ \
+		https://github.com/trezor/python-shamir-mnemonic
+
+LICENSE=	MIT
+LICENSE_FILE=	${WRKSRC}/LICENSE
+
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}poetry-core>=1.0:devel/py-poetry-core@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}click>=8,<9:devel/py-click@${PY_FLAVOR}
+
+USES=		python
+USE_PYTHON=	autoplist pep517
+
+.include <bsd.port.mk>
diff --git a/security/py-shamir-mnemonic/distinfo b/security/py-shamir-mnemonic/distinfo
new file mode 100644
index 000000000000..a6705c5fd511
--- /dev/null
+++ b/security/py-shamir-mnemonic/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1770843433
+SHA256 (shamir_mnemonic-0.3.0.tar.gz) = bc04886a1ddfe2a64d8a3ec51abf0f664d98d5b557cc7e78a8ad2d10a1d87438
+SIZE (shamir_mnemonic-0.3.0.tar.gz) = 21757
diff --git a/security/py-shamir-mnemonic/pkg-descr b/security/py-shamir-mnemonic/pkg-descr
new file mode 100644
index 000000000000..f562476a1720
--- /dev/null
+++ b/security/py-shamir-mnemonic/pkg-descr
@@ -0,0 +1,12 @@
+shamir-mnemonic is a Python implementation of SLIP-0039, a standard for
+splitting secrets into multiple mnemonic word shares using Shamir's
+Secret Sharing scheme.
+
+It is designed primarily for use with cryptocurrency wallets and
+hardware devices, enabling secure backup and recovery of sensitive
+secrets through human-readable word lists.
+
+The library provides tools for generating mnemonic shares, combining
+shares to recover secrets, and validating share sets, while remaining
+compatible with SLIP-0039 implementations used by Trezor and related
+ecosystems.