diff --git a/back/src/auth/jwt.strategy.ts b/back/src/auth/jwt.strategy.ts
new file mode 100644
index 0000000..a03932e
--- /dev/null
+++ b/back/src/auth/jwt.strategy.ts
@@ -0,0 +1,20 @@
+
+import { ExtractJwt, Strategy } from 'passport-jwt';
+import { PassportStrategy } from '@nestjs/passport';
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+
+@Injectable()
+export class JwtStrategy extends PassportStrategy(Strategy) {
+  constructor(private configService: ConfigService) {
+    super({
+      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
+      ignoreExpiration: false,
+      secretOrKey: configService.get('JWT_SECRET'),
+    });
+  }
+
+  async validate(payload: any) {
+    return { id: payload.id, username: payload.username };
+  }
+}
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