Switck appears to be a reference to the androgenous/trans character Switch in the Matrix. The switck GitHub and Twitter profiles use the identical profile pic. The Twitter profile contains the pronouns "She/he/his/hers." in the bio. Coinkite CTO Peter D. Gray's GPG key signed a large number of commits under the switck GitHub account in the libngu repository (the library that introduced the critical RNG preprocessor bug). This includes the key January 2021 commit (f19de05) that contained the defective #ifndef guard. Multiple independent checks (terminal verification scripts shared publicly) confirmed the signatures match Peter’s known key used for Coldcard/firmware work under the doc-hex identity.