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Copy file name to clipboardExpand all lines: data/9000/rfc9580-trans.json
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"number": 9580,
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"created_at": "2024-08-01 23:24:19.510145+09:00",
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"updated_by": "",
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"updated_by": "自動生成&有志による翻訳・編集",
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"contents": [
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"text": "The key words \"MUST\", \"MUST NOT\", \"REQUIRED\", \"SHALL\", \"SHALL NOT\", \"SHOULD\", \"SHOULD NOT\", \"RECOMMENDED\", \"NOT RECOMMENDED\", \"MAY\", and \"OPTIONAL\" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.",
"text": "where x and y are coordinates of the point P = (x, y), and each is encoded in the big-endian format and zero-padded to the adjusted underlying field size. The adjusted underlying field size is the underlying field size rounded up to the nearest 8-bit boundary, as noted in the \"fsize\" column in Section 9.2. This encoding is compatible with the definition given in [SEC1].",
"text": "where p is the public key of the point encoded using the rules defined for the specified curve. This format is used for ECDH keys based on curves expressed in Montgomery form and for points when using EdDSA.",
"text": "Given the above definitions, the exact size of the MPI payload for an encoded point is 515 bits for both NIST P-256 and brainpoolP256r1, 771 for both NIST P-384 and brainpoolP384r1, 1059 for NIST P-521, 1027 for brainpoolP512r1, and 263 for both Curve25519Legacy and Ed25519Legacy. For example, the length of an EdDSALegacy public key for the curve Ed25519Legacy is 263 bits: 7 bits to represent the 0x40 prefix octet and 32 octets for the native value of the public key.",
"text": "Even though the zero point (also called the \"point at infinity\") may occur as a result of arithmetic operations on points of an elliptic curve, it SHALL NOT appear in data structures defined in this document.",
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