PrismKit加密與資安PDF 簽章檢查器PDF 簽章檢查器在瀏覽器中執行本機複製連結Markdown檢視 PDF 中嵌入的數位簽章，並檢查檔案在簽署後是否被修改。憑證解碼器Decode a PEM certificate or CSR to see its subject, issuer, validity, names, key and fingerprints.憑證格式轉換器Convert certificates between PEM and DER, unpack PKCS#7 (.p7b) and PKCS#12 (.p12/.pfx) files, and build a .p12 from a certificate and key.