The wallet attestation is no more signed with a DID but with a key provided in a X509 inside the attestation itself.
The key is in the x5c attribute of the jwt header.
There maybe several x509 certificates, as the first one is the leaf and others are intermediary.
NB : there is 1 exp for the WIA and one exp for the status listof the WIA
below a wallet attestation jwt
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.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.pk9APJV6Yibpw6pUj46ExsdoAzFfb4ejjEJY-yZEpFpN50vV0-93JeSi5g6ISR7DWTeJD2M2nk3xTmz5Rt9PVQ
Eventually read the doc https://github.com/eu-digital-identity-wallet/eudi-doc-standards-and-technical-specifications/blob/main/docs/technical-specifications/ts3-wallet-unit-attestation.md
The wallet attestation is no more signed with a DID but with a key provided in a X509 inside the attestation itself.
The key is in the x5c attribute of the jwt header.
There maybe several x509 certificates, as the first one is the leaf and others are intermediary.
NB : there is 1 exp for the WIA and one exp for the status listof the WIA
below a wallet attestation jwt
eyJhbGciOiJFUzI1NiIsInR5cCI6Im9hdXRoLWNsaWVudC1hdHRlc3RhdGlvbitqd3QiLCJ4NWMiOlsiTUlJRCtEQ0NBbUNnQXdJQkFnSVVCU0ZpWHpMYWRzYUdHRG9OakJGRGN1ZzVDdnd3RFFZSktvWklodmNOQVFFTEJRQXdnWUl4Q3pBSkJnTlZCQVlUQWtaU01RNHdEQVlEVlFRSERBVlFZWEpwY3pFek1ERUdBMVVFQ2d3cVZHRnNZVzhnUTJ4cFpXNTBJRUYwZEdWemRHRjBhVzl1SUZSbGMzUWdWSEoxYzNRZ1FXNWphRzl5TVM0d0xBWURWUVFERENWVVlXeGhieUJEYkdsbGJuUWdRWFIwWlhOMFlYUnBiMjRnVkdWemRDQlNiMjkwSUVOQk1CNFhEVEkyTURjek1ERXdNVEEwT0ZvWERUSTRNVEV3TVRFd01UVTBPRm93Y2pFTE1Ba0dBMVVFQmhNQ1JsSXhEakFNQmdOVkJBY01CVkJoY21sek1TOHdMUVlEVlFRS0RDWlVZV3hoYnlCRGJHbGxiblFnUVhSMFpYTjBZWFJwYjI0Z1ZHVnpkQ0JRY205MmFXUmxjakVpTUNBR0ExVUVBd3daZDJGc2JHVjBMWEJ5YjNacFpHVnlMbXh2WTJGc2FHOXpkREJaTUJNR0J5cUdTTTQ5QWdFR0NDcUdTTTQ5QXdFSEEwSUFCUDd3VTlvaE1waUwxNGRNWWZtdVJ3L3lRS2JucGRzMzdsOVBRTFNFaXRZZ3RtbFJFdFduajA3SWpleWNjL0tDR2NrbEZGUFN4MXp3L0ZoNzVNRGlMb09qZ2I4d2did3dEQVlEVlIwVEFRSC9CQUl3QURBT0JnTlZIUThCQWY4RUJBTUNCNEF3RXdZRFZSMGxCQXd3Q2dZSUt3WUJCUVVIQXdNd0hRWURWUjBPQkJZRUZCVk9pOXdxQ243d0JXaUFKbjdhc0NSeFZWRVBNQjhHQTFVZEl3UVlNQmFBRkcrTFlxM0g2VzdXeEZ2K0ZxdC96UEU2R0RtSk1FY0dBMVVkRVFSQU1ENkNHWGRoYkd4bGRDMXdjbTkyYVdSbGNpNXNiMk5oYkdodmMzU0dJV2gwZEhCek9pOHZkMkZzYkdWMExYQnliM1pwWkdWeUxteHZZMkZzYUc5emREQU5CZ2txaGtpRzl3MEJBUXNGQUFPQ0FZRUFZU3BZRG93OWpOL29hUXVUZlBMekdza3FiQ3cvQjhKR08vUXlPMlZ3aVVidWNwUDJndEZwK2FyOTBqZ0JtdXI3cG8rNnFtV2duN0dVaVFUNHlHaFZzME4wRVdDNkJKZWlnQmpVY0Z5SHpCZEVYODRIMEduQ1lReXRGSWZSMUt6U3J5elM3bTBGQ0JkL3gybnE5OHdxWmh3cnRTcUFPUFgxblhaMWVzNTI2ajNTME9pcjBRUWxzMjljTS9aeitpYVJkK3ZpQzRsTERVTi8rUVQ3THBmb1FLYkRVSEpON3doRURmQWdxNFVYK01PbllZc3JVVXBiRlliQXdPZzNJeTFzUUIrU21VZFRSTnYrT0RaVE5vM1hkbm9oSFZ2SWExQ3lLOTVoS0NiblpzVHlmOWM1N3FNbEZVeVBabyt0bXdGTWFYYURhbzNjWEllRkY3RGNONFNxT3pSTjBrOHpBUEwzNm5JLzlJOUd5clhyZXBGNkVabEpOTFJJTklJdWtJN1o2TFhHUStRODRlSmN2MmswRVd5VU1JcXJtaGdVU0hZaXV1cjg2TExkdG5STzhtOTdudzdQUGRBcUFDR21QdFJTdzgxQnBLNHFpK2NCcHorSGZsc3ZUaFdDM3BZZ1BzQXcyL1ROcnJNZU9ZTnRDdXREZExIYmhoYi9LNmtCSitsaCJdfQ.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.pk9APJV6Yibpw6pUj46ExsdoAzFfb4ejjEJY-yZEpFpN50vV0-93JeSi5g6ISR7DWTeJD2M2nk3xTmz5Rt9PVQ
Eventually read the doc https://github.com/eu-digital-identity-wallet/eudi-doc-standards-and-technical-specifications/blob/main/docs/technical-specifications/ts3-wallet-unit-attestation.md