PROBLEM TO BE SOLVED: To provide an authenticity assurance method for reducing time and efforts of executing authentication processing over a plurality of times while an electrocardiogram waveform is measured, and improving convenience for a user.SOLUTION: An authenticity assurance method includes: a step S18 in which an authenticity assurance device 400 receives an electrocardiogram waveform of a subject from a portable information terminal 200； steps S12 and S15 in which the authenticity assurance device receives an authentication ID of a person to be authenticated and a pulse wave of the person to be authenticated from an authentication device 300； a step S19 in which the authenticity assurance device executes collation processing for collating the electrocardiogram waveform and the pulse wave； a step S20 in which the authenticity assurance device executes continuity determination on whether or not the electrocardiogram waveform is continuously received when the collation by the collation processing is successful； and a step S21 in which the authenticity assurance device outputs an authentication determination result.SELECTED DRAWING: Figure 4【課題】心電図波形が測定されている間、複数回にわたって認証処理を行う手間を軽減してユーザの利便性を向上させることのできる真正性保証方法を提供する。【解決手段】真正性保証方法は、真正性保証装置４００が、携帯情報端末２００から、被測定者の心電図波形を受信するステップＳ１８と、認証装置３００から、被認証者の認証ＩＤ及び被認証者の脈波を受信するステップＳ１２、Ｓ１５と、心電図波形及び脈波を照合する照合処理を行うステップＳ１９と、照合処理による照合が成功した場合、心電図波形が連続して受信されていたか否かの連続性判定を行うステップＳ２０と、真正性判定結果を出力するステップＳ２１と、を含む。【選択図】図４
