Unverified50% confidenceFactExact time
RFC 4648 定义了 base64url 变体，将 + 和 / 替换为 - 和 _，使编码结果可用于 URL 参数，被 JWT 广泛采用
1
Sources
50%
Confidence
Long-term
Relevance
7/6/2026
First Seen
Sources
Related Claims
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