This article explains why during a connection you’re asked to provide a passphrase for a PuTTY key (encrypted with a passphrase), even after you’ve already entered the correct passphrase.
The problem occurs with PuTTY keys in the version 3 format, which was introduced and added as the default format for saving keys in PuTTY 0.75. As of now, Termius cannot decrypt this kind of private key.
To make sure you’ve faced this particular problem, check that the key contains the following line:
There are two workarounds to the problem:
- Converting the key to OpenSSH format via the 'Conversions' > 'Export OpenSSH key' option in PuTTYgen.
- Resaving the key in the version 2 instead of 3. For that, in PuTTYgen, choose '2' in 'Key' > 'Parameters for saving key files' > 'PPK file version'.
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