Yubico Replacing YubiKey FIPS Devices Due to Security Issue
Yubico is in the process of replacing YubiKey FIPS (Federal Information Processing Standards) security keys following the discovery of a potentially serious cryptography-related issue that can cause RSA keys and ECDSA signatures generated on these devices to have reduced strength.
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Story added 14. June 2019, content source with full text you can find at link above.