6.1.10 KEN: KeyExpiryNumber 钥匙失效号码
A KEN is associated with each VendingKey by the KMS, and defines the time when a VendingKey and any corresponding DecoderKey will expire, after which it becomes invalid for further use, subject to certain concessions.
KMS将KEN与每个VendingKey关联起来，并定义了VendingKey和任何相应的解码器密钥的过期时间，过期后将失效，以获得某些让步。
The KEN corresponds to the most significant 8 bits of the 24-bit TID. Any token identifier whose most significant 8 bits are greater than a given key's KEN cannot be encrypted or decrypted with that key.
KEN对应于24位TID的最高8位。任何最高8位大于给定密钥KEN的令牌标识符都不能用该密钥加密或解密。
See 6.5.2.6 for a detailed definition of this data element.
有关该数据元素的详细定义，请参见6.5.2.6。
See also C.3.4 for Code of practice on managing this data element.
有关管理该数据元素的实践代码，请参见C.3.4。
6.1.11 DOE: DateOfExpiry 失效日期
The use of this date is optional and is associated with a validity period for identity related data that gets encoded onto an identity-carrying device. For example: a payment meter ID card or a second record encoded onto the TokenCarrier together with the token data. In some implementations it is found to be useful to let the customer bring back a used token carrier to serve as his decoder identification to the POS when purchasing his next token. (See for example 5.1.4 and 5.2.4.9 of IEC 62055-51 :2007).
该日期的使用是可选的，并与身份相关数据的有效期相关联，这些数据被编码到携带身份的设备上。例如：支付表ID卡或与令牌数据一起编码到令牌运营商的第二个记录。在某些实现中，人们发现让客户带回一个使用过的令牌载体，作为购买下一个令牌时POS机的解码器标识是有用的。（参见IEC 62055-51:2007的示例5.1.4和5.2.4.9）。
This date may also be used, for example, in cases where a consumer has been granted a
concessionary tariff for a limited period. The date encoded is the last month for which the card
is valid.
这一日期也可用于，例如，在消费者获得一段有限时期的优惠关税的情况下。编码的日期是该卡有效的最后一个月。
DOE is in the format YYMM and shall always contain 4 digits.Where YY or MM is less than 1 0, it shall be right justified and left padded with 0 (for example 01 , 02, 09, etc.).When the DOE in the IDRecord is not used, then YYMM = 0000.
DOE 格式是 YYMM，通常是 4 位数。YY或MM小于10时，右对齐，左填充0（如01、02、09等）。如果不使用IDRecord中的DOE，则YYMM = 0000。
DOE code values for the year and month are given in Table 9 and Table 1 0.
年份和月份的DOE代码值见表9和表10。
6.1.12 BDT: BaseDate
The BaseDate is a date and time marker, from which a token identifier (TID) is calculated (see 6.3.5 for using the BaseDate to calculate a TID).
BaseDate是一个日期和时间标记，可以从中计算令牌标识符（TID）（使用BaseDate计算TID的内容，请参见6.3.5）。
BaseDate is given with respect to Coordinated Universal Time (UTC) time zone.In order to accommodate the fact that the 24-bit TID will roll over approximately every 31 years, three BaseDate values are defined and are given in Table 1 1 .
BaseDate是基于协调世界时（UTC）时区给出的。为了适应24位TID大约每31年滚动一次的事实，表1中定义了3个基准值。
