How to encrypt symmetric to many passphrases?

[Per Tunedal Casual]

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Hi,
I would like to encrypt symmetric to more than one passphrase. How to
do it?

And further: How to encrypt both to a key and to one ore more
passphrases?
Vänligen
Per Tunedal
Civ. ing. Civ. ek.

S:t Mickelsgatan 148
129 44 Hägersten
Telefon: 08-646 34 83
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