pyscard>=1.9.9 #2.0.0
pyaes>=1.6.1 # last-resort secure-channel AES, for builds without cryptography/pycryptodomex
cryptography>=42.0.0 # primary backend for all private-key EC operations and for secure-channel AES
pyopenssl>=20.0.0 # for certificate chain validation
pycryptodomex>=3.18 # fallback when OpenSSL is unavailable (certificates + secure-channel AES)
certifi

